BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//FeRMI - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:FeRMI
X-ORIGINAL-URL:https://fermi.univ-tlse3.fr
X-WR-CALDESC:Évènements pour FeRMI
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20270328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20271031T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260424T110000
DTEND;TZID=Europe/Paris:20260424T123000
DTSTAMP:20260428T063257
CREATED:20260421T121320Z
LAST-MODIFIED:20260422T070504Z
UID:12155-1777028400-1777033800@fermi.univ-tlse3.fr
SUMMARY:Rouler plus vite grâce à la physique ? - (Philippe ODIER / Seminar / SFP). - 24/04/2026\, 11H
DESCRIPTION:Séminaire SFP \nPhilippe ODIER ENS Lyon\, Salle de Conférence\, Bât. 3R4 \nAffiche Rouler plus vite grâce à la physique ? \n 
URL:https://fermi.univ-tlse3.fr/event/rouler-plus-vite-grace-a-la-physique-philippe-odier-seminar-sfp-24-04-2026-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,Seminars,SFP / SFC
ATTACH;FMTTYPE=image/jpeg:https://fermi.univ-tlse3.fr/wp-content/uploads/2026/04/AFFICHE_SFP_Odier_24_04_2026.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260423T140000
DTEND;TZID=Europe/Paris:20260423T150000
DTSTAMP:20260428T063257
CREATED:20260422T065723Z
LAST-MODIFIED:20260422T065723Z
UID:12186-1776952800-1776956400@fermi.univ-tlse3.fr
SUMMARY:The Status of Axion Dark Matter Searches and the Next Frontier. -  ( Yannis K. Semertzidis /  LNCMI / Seminar). - 23/04/2026\, 14H
DESCRIPTION:Seminar LNCMI \nYannis K. Semertzidis\, Korea Advanced Institute of Science and Technology (KAIST) in Daejeon \nSeminar LNCMI\, 23/04/2026\, 14H\, LNCMI\,Visio \nAbstract\nOver the past decade\, axion dark matter searches have made substantial progress\, with resonant haloscope experiments probing well-motivated regions of parameter space at unprecedented sensitivity. Advances in high-Q cavities\, quantum-limited amplifiers\, and optimized scanning strategies have enabled leading experiments to approach\, and in some cases reach\, key theoretical benchmarks. \nExtending this sensitivity to higher frequencies\, however\, remains a central challenge. As cavity volumes decrease and technical demands increase\, the experimental figure of merit B^2 V becomes the dominant limiting factor in achievable signal power. In this regime\, access to large magnetic fields over significant volumes is not simply advantageous—it is decisive. \nProf. Semertzidis will review the current experimental landscape and discuss emerging directions aimed at the sub-GHz and tens-of-GHz range with theoretically motivated sensitivities. In particular\, he will highlight how facilities that already meet the most demanding B^2 V requirements are uniquely positioned to lead this effort\, provided that complementary detection capabilities are developed in parallel. This combination offers a realistic and timely path toward exploring a largely uncharted region of axion parameter space with competitive sensitivity. \nLien Zoom : https://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1
URL:https://fermi.univ-tlse3.fr/event/the-status-of-axion-dark-matter-searches-and-the-next-frontier-yannis-k-semertzidis-lncmi-seminar-23-04-2026-14h/
LOCATION:Visio
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260420T133000
DTEND;TZID=Europe/Paris:20260420T170000
DTSTAMP:20260428T063257
CREATED:20260416T081555Z
LAST-MODIFIED:20260416T121550Z
UID:12102-1776691800-1776704400@fermi.univ-tlse3.fr
SUMMARY:Interférométrie atomique à très grand transfert d'impulsion fondée sur l'approche de Floquet. - (Léo Calmels / LCAR / Thèse). - 20/04/2026\, 13H30
DESCRIPTION:Soutenance de thèse \nLéo Calmels\, LCAR\, Salle de conférence\, Bat. 3R4 – 13H30 \n\n \n \n 
URL:https://fermi.univ-tlse3.fr/event/interferometrie-atomique-a-tres-grand-transfert-dimpulsion-fondee-sur-lapproche-de-floquet-leo-calmels-lcar-these-20-04-2026-13h30/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,HDR / Thesis,LCAR
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260416T140000
DTEND;TZID=Europe/Paris:20260416T153000
DTSTAMP:20260428T063257
CREATED:20260416T112808Z
LAST-MODIFIED:20260416T121540Z
UID:11988-1776348000-1776353400@fermi.univ-tlse3.fr
SUMMARY:TS-Free Prediction of Activation Strain Components of Diels–Alder Reactions with Graph Neural Networks. - ( Daiann Sosa Carrizo / LPCNO / Seminar). - 16/04/2026\, 14H
DESCRIPTION:Séminaire du LCPQ \nDaiann Sosa Carrizo\, LPCNO \nSeminar LCPQ\, 16/04/2026\, 14H \nSummary :\nMachine learning is transforming computational chemistry. From predicting molecular properties — solubility\, spectroscopic\, and drug-likeness — to guiding retrosynthetic planning and catalyst design\, ML models have progressively replaced expensive quantum-chemical calculations with fast\, learned approximations. Yet some class of properties has remained largely out of reach: those that encode transition-state geometry.[1]\nThe Activation Strain Model (ASM) decomposes activation barriers into fragment deformation energies (ΔE‡_strain) and interfragment interaction energy (ΔE‡_int)\, explaining why a reaction is fast or slow rather than merely predicting trends. Computing these quantities requires explicit DFT transition-state optimisation — costly and incompatible with high-throughput screening.[2-3]\nIn this seminar\, I will discuss the application of the directed message-passing neural network (Dual D-MPNN) to predict ASM components from reactant SMILES\, without TS optimisation or hand-crafted descriptors. The model was trained on 802 endo Diels–Alder reactions computed at the M06-2X/6-311+G(d\,p) level of theory.[4] \nError analysis reveals a chemically interpretable result: diene conformational rigidity\, not electronic complexity\, is the primary determinant of model accuracy. Rigid heteroaromatic dienes such as furans are predicted near chemical accuracy\, while flexible hetero-acyclic dienes bearing conjugated carbonyl groups remain the principal failure mode. This is not an architectural limitation — it reflects a fundamental constraint of 2D molecular graphs\, which cannot encode the conformational ambiguity that determines TS geometry in flexible systems. \nAs a prospective application\, this model will be used to screen virtual diene libraries and identify reactive candidates for Diels–Alder reactions targeting terpenoid and alkaloid natural products. In these systems\, the ASM decomposition provides design principles — distinguishing strain-controlled from interaction-controlled reactivity — that barrier heights alone cannot offer. \n\n[1]. Chen\, X. et al. Nat. Synth. 2025\, 4\, 877–887.\n[2] Bickelhaupt\, F. M. et al. Angew. Chem. Int. Ed. 2017\, 56\, 10070–10086\n[3] Brunard\, E. et al. J. Am. Chem. Soc. 2024\, 146\, 5843–5854.\n[4] Vargas\, S. et al. J. Chem. Theory Comput. 2021\, 17\, 6098–6110.
URL:https://fermi.univ-tlse3.fr/event/ts-free-prediction-of-activation-strain-components-of-diels-alder-reactions-with-graph-neural-networks-daiann-sosa-carrizo-lpcno-seminar-2-02-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LCPQ,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260416T110000
DTEND;TZID=Europe/Paris:20260416T123000
DTSTAMP:20260428T063257
CREATED:20260414T082435Z
LAST-MODIFIED:20260414T085115Z
UID:12105-1776337200-1776342600@fermi.univ-tlse3.fr
SUMMARY:Quantum key distribution: an information-theoretic view. - ( Meryem BENAMMAR / LCAR / Seminar). - 16/04/2026\, 11H
DESCRIPTION:Séminaire LCAR \nMeryem BENAMMAR\,  Institut Supérieur de l’Aéronautique et de l’Espace (ISAE)\, Toulouse  \nSummary\nWith the ever-growing need for secure communication links\, and the rapid evolving of quantum computing\, secret key generation has become a corner stone in the design of modern communication networks. Quantum key distribution (QKD) is one of the effective approaches for secret key generation under a quantum computing threat\, since its security stems from quantum mechanics (physics) and not from computational hardness of some mathematical problem. Hence\, QKD falls under the so-called physical layer secret key generation. While secret key generation from classical physical sources is well established in the information-theoretic literature since the seventies\, secret key generation from quantum sources is\, in turn\, more challenging to analyze from an information-theoretic perspective due to intrinsic differences between classical and quantum information processing tools. In this talk\, based on a simple BB84 protocol\, we describe an information theoretical framework to analyze and design QKD schemes by resorting to tools and results of quantum information theory\, while highlighting the main differences with classical secret key generation.
URL:https://fermi.univ-tlse3.fr/event/quantum-key-distribution-an-information-theoretic-view-meryem-benammar-lcar-seminar-16-04-2026-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LCAR,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260416T103000
DTEND;TZID=Europe/Paris:20260416T120000
DTSTAMP:20260428T063257
CREATED:20260414T083059Z
LAST-MODIFIED:20260414T085123Z
UID:12107-1776335400-1776340800@fermi.univ-tlse3.fr
SUMMARY:"La Coordination Nationale de la Sécurité des Systèmes d'Information (CNSSI) et ses activités"  &  "Le Numérique\, un enjeu de souveraineté" .  - (Michel Chabanne / CEMES /  Seminar). - 16/04/2026\, 10H30
DESCRIPTION:Séminaire du Jeudi\, CEMES \nMichel Chabanne RSSI du CNRS\,\n \nCEMES\, 16/04/2026\, 10H30 \nLein web : https://visio.numerique.gouv.fr/bpw-acmf-gtt
URL:https://fermi.univ-tlse3.fr/event/la-coordination-nationale-de-la-securite-des-systemes-dinformation-cnssi-et-ses-activites-le-numerique-un-enjeu-de-souverainete-michel-chabanne-cemes-seminar-16-04-2026/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:CEMES,Events,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260408T140000
DTEND;TZID=Europe/Paris:20260408T170000
DTSTAMP:20260428T063257
CREATED:20260328T084334Z
LAST-MODIFIED:20260330T124424Z
UID:12081-1775656800-1775667600@fermi.univ-tlse3.fr
SUMMARY:Le Contrôle quantique appliqué à l'information de Fisher : réalisation de mesures quantiques optimales en temps fini. - (Nicolas Ombredane / LCAR / Thèse). - 8/04/2026\, 14H
DESCRIPTION:Soutenance de thèse \nNicolas Ombredane\, LCAR\, Salle de conférence\, Bat. 3R4 \n\n \n \n 
URL:https://fermi.univ-tlse3.fr/event/le-controle-quantique-applique-a-linformation-de-fisher-realisation-de-mesures-quantiques-optimales-en-temps-fini-nicolas-ombredane-lcar-these-8-04-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,HDR / Thesis,LCAR
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260407T140000
DTEND;TZID=Europe/Paris:20260407T150000
DTSTAMP:20260428T063257
CREATED:20260329T075454Z
LAST-MODIFIED:20260330T075644Z
UID:11803-1775570400-1775574000@fermi.univ-tlse3.fr
SUMMARY:TBA. - (Gilles Parez / LPT / Seminar). -7/04/2026\, 14H
DESCRIPTION:Séminaire LPT \nGilles Parez (LAPTh) \nSeminar LPT\, 7/04/2026\, 14H\, 3R4\, salle de conférence
URL:https://fermi.univ-tlse3.fr/event/tba-gilles-parez-lpt-seminar-17-02-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260402T140000
DTEND;TZID=Europe/Paris:20260402T153000
DTSTAMP:20260428T063257
CREATED:20260330T052823Z
LAST-MODIFIED:20260330T123043Z
UID:12091-1775138400-1775143800@fermi.univ-tlse3.fr
SUMMARY:Investigating the electronic properties of two-dimensional heterostructures  with optics and magneto-optics. -  ( Elena Blundo /  LNCMI / Seminar). - 2/04/2026\, 14H
DESCRIPTION:Seminar LNCMI \nElena Blundo\, Walter Schottky Institute at the Technical University of Munich \nSeminar LNCMI\, 2/04/2026\, 14H\, LNCMI\,Visio \nAbstract\nIn the so-called layered materials\, the crystal layers are held together by weak van der Waals (vdW) interactions [1]. This has enabled the exfoliation of atomically-thin\, two-dimensional (2D) crystals\, opening the door to a burgeoning field of research. 2D materials open new opportunities for matter manipulation at the nanoscale\, far beyond what conventional covalent materials allow. vdW interactions enable the creation of heterostructures with unprecedented freedom in the choice of the materials and even in their rotational alignment. \nIn this seminar\, we will explore how assembling different vdW crystals (e.g.\, semiconducting transition metal dichalcogenides such as MoSe2 and WSe2) gives rise to entirely new materials. The opto-electronic properties of these 2D heterostructures differ strikingly from those of their constituent materials\, as interlayer interactions unlock the formation of new exciton states with distinct energy\, lifetime\, spin-valley selection rules\, and spatial confinement\, thereby affecting light absorption and emission. We will show how the system’s interaction with light—also in combination with high magnetic fields or electric fields—can be exploited to reveal the properties of these new electronic configurations [2\,3].Going beyond the fundamental physics of 2D heterostructures\, we will explore novel strategies to control and manipulate these electronic states\, e.g. through ferroelectricity [4] or ferromagnetism\,opening new pathways for precise material design and tuneable light emission. \nLien Zoom : https://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1 \nReferences:\n[1] E. Blundo\, T. Yildirim\, G. Pettinari\, and A. Polimeni\, Experimental Adhesion energy in van der Waals crystals and heterostructures from atomically-thin bubbles\, Phys. Rev. Lett. 127\, 046101 (2021).\n[2] E. Blundo\, F. Tuzi\, S. Cianci\, M. Cuccu\, K. Olkowska-Pucko\, Ł. Kipczak\, G. Contestabile\, A. Miriametro\, M. Felici\, G. Pettinari\, T. Taniguchi\, K. Watanabe\, A. Babiński\, M. R. Molas\, and A. Polimeni\, Localisation-to-delocalisation transition of moiré excitons in WSe2/MoSe2 heterostructures\, Nat. Commun. 15\, 1057 (2024).\n[3] P. Soubelet\, A. Delhomme\, E. Blundo\, A.V. Stier\, and J.J. Finley\, Polarons shape the interlayer exciton emission of MoSe2/WSe2 heterobilayers\, Nat. Commun. 16\, 8735 (2025).\n[4] J. Schwandt-Krause\, M. E. A. Miloudi\, E. Blundo\, S. Deb\, J.-N. Heidkamp\, K. Watanabe\, T. Taniguchi\, R. Schwartz\, A. Stier\, J. J. Finley\, O. Kühn\, and T. Korn\, Ferroelectric Control of Interlayer Excitons in 3R-MoS2 / MoSe2 Heterostructures\, Nano Lett. 26\, 214 (2026).
URL:https://fermi.univ-tlse3.fr/event/investigating-the-electronic-properties-of-two-dimensional-heterostructures-with-optics-and-magneto-optics-elena-blundo-lncmi-seminar-2-04-2026-14h/
LOCATION:Visio
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260331T140000
DTEND;TZID=Europe/Paris:20260331T153000
DTSTAMP:20260428T063257
CREATED:20260330T073149Z
LAST-MODIFIED:20260330T122000Z
UID:12031-1774965600-1774971000@fermi.univ-tlse3.fr
SUMMARY:Hall effect in quasi-1D interacting systems. - (Thierry Giamarchi / LPT / Seminar). -31/03/2026\, 14H
DESCRIPTION:Séminaire LPT \nThierry Giamarchi (Université de Genève) \nSeminar LPT\, 31/03/2026\, 14H\, 3R4\, salle de conférence \nSummary\nHall effect is one of the most central measures in condensed matter systems. In the most naïve semi-classical theories\, it gives access to the number of carriers. We know however that this vision is way too simple and for non-interacting systems the Hall effect has been beautifully connected to the curvature of the Fermi surface and to topological invariants. However\, and despite severe efforts\, understanding the Hall effect for interacting systems remain an ongoing challenge. \nI will show in this talk how one can compute the Hall effect for coupled 1D structures such as ladders\, and how using numerical approaches one can predict at large tunnelling between the legs of the latter or large interactions a universal behavior of the Hall coefficient for an interacting ladder.. This prediction will be successfully compared with recent experiments in systems with synthetic gauge fields and synthetic dimensions.. \nI will also discuss how in the opposite limit of small tunnelling\, field theory methods such as bosonisation allow to compute the Hall coefficient and related it to the charge stiffness of the system in the absence of a magnetic field.
URL:https://fermi.univ-tlse3.fr/event/tba-thierry-giamarchi-lpt-seminar-31-03-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260327T110000
DTEND;TZID=Europe/Paris:20260327T123000
DTSTAMP:20260428T063257
CREATED:20260324T084511Z
LAST-MODIFIED:20260325T084659Z
UID:12057-1774609200-1774614600@fermi.univ-tlse3.fr
SUMMARY:Scaling up matter-wave interferometry: Towards next-generation quantum sensors. - (Alexandre Gauguet/ Seminar / SFP). - 27/03/2026\, 11H
DESCRIPTION:Séminaire SFP \nAlexandre Gauguet LCAR\, Salle de Conférence\, Bât. 3R4 \nAffiche presentation séminaire SFP\, Alexandre Gauguet \n 
URL:https://fermi.univ-tlse3.fr/event/scaling-up-matter-wave-interferometry-towards-next-generation-quantum-sensors-alexandre-gauguet-seminar-sfp-27-03-2026-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,Seminars,SFP / SFC
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260326T140000
DTEND;TZID=Europe/Paris:20260326T153000
DTSTAMP:20260428T063257
CREATED:20260325T073831Z
LAST-MODIFIED:20260325T084651Z
UID:12054-1774533600-1774539000@fermi.univ-tlse3.fr
SUMMARY:Terahertz Magnon-Polariton Control Using a Tunable Liquid Crystal Cavity. - (Dmitriy Yavorskiy /  LNCMI / Seminar). - 26/03/2026\, 14H
DESCRIPTION:Seminar LNCMI \nDmitriy Yavorskiy\, Polish Academy of Sciences in Warsaw \nSeminar LNCMI\, 26/03/2026\, 14H\, LNCMI\, Salle Pauthenet \nAbstract\nIn the strong light–matter coupling regime\, polariton modes emerge as hybrid excitations combining electromagnetic cavity modes and material resonances. While magnon–polaritons in ferromagnets have been extensively explored at microwave frequencies\, antiferromagnetic systems enable access to the terahertz (THz) range\, where strong coupling can be achieved using Fabry–Perot cavities. However\, antiferromagnetic magnons are typically tunable only via temperature or high magnetic fields\, which limits dynamic control of magnon–polariton states. Here we demonstrate remote electrical control of antiferromagnetic magnon–polaritons by combining an antiferromagnetic crystal with an electrically tunable photonic environment. The system consists of a nickel oxide (NiO) slab\, chosen for its low spin damping and temperature-dependent resonance frequency near 1.0 THz above room temperature\, placed adjacent to a nematic liquid-crystal cell and separated by a controlled gap of approximately 2.5 mm. The magnon frequency is tuned via the NiO temperature\, while an applied electric field reorients the liquid crystal\, modifying the cavity-mode frequencies and spatial field distributions. Using terahertz time-domain spectroscopy\, we measure reflection spectra as functions of temperature and applied voltage and observe voltage-controlled avoided crossings between cavity modes and magnons\, as well as changes in the magnon–photon coupling strength. These results demonstrate remote electrical control of antiferromagnetic magnon–polariton states at room temperature without direct physical contact between the magnetic material and the electrically active element. \nLien Zoom : https://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1 \nReferences:\n[1] D. Yavorskiy et al\, ACS Photonics 12\, 5c01879 (2025)
URL:https://fermi.univ-tlse3.fr/event/terahertz-magnon-polariton-control-using-a-tunable-liquid-crystal-cavity-dmitriy-yavorskiy-lncmi-seminar-26-03-2026-14h/
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260326T110000
DTEND;TZID=Europe/Paris:20260326T123000
DTSTAMP:20260428T063257
CREATED:20260325T081447Z
LAST-MODIFIED:20260325T084639Z
UID:12026-1774522800-1774528200@fermi.univ-tlse3.fr
SUMMARY:Quantum empty waves revisited. - (Thomas Durt / LCAR / Seminar). - 26/03/2026\, 11H
DESCRIPTION:Séminaire LCAR \nThomas Durt\,  Ecole Centrale Mediterranee\, Institut Fresnel\, Marseille \nSummary\nThe idea of empty waves can be traced back to Einstein who faced the following problem when he developed his theory of the photon: if the localized particle (the photon) carries all the energy and momentum\, how can the wave (here the Maxwell wave) be considered real? A possible way to answer this question is to consider the wave as an empty wave (what Einstein called Gespenterfelder -ghost field-)\, which corresponds to the so-called pilot-wave introduced by L. de Broglie in a quantum framework in 1926\, one century ago. \nIn our talk we will discuss these questions and present an experimental proposal aimed at putting into evidence the objective existence and the reality of such empty waves.
URL:https://fermi.univ-tlse3.fr/event/quantum-empty-waves-revisited-thomas-durt-lcar-seminar-26-03-2026-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LCAR,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260320T093000
DTEND;TZID=Europe/Paris:20260320T130000
DTSTAMP:20260428T063257
CREATED:20260325T090005Z
LAST-MODIFIED:20260325T090005Z
UID:12062-1773999000-1774011600@fermi.univ-tlse3.fr
SUMMARY:Etude de la microstructure et des procédés de fabrication de la porcelaine noire et blanche : une porcelaine décorative caractéristique.  - (Minli Wang / CEMES / These). - 20/03/2026\, 9H30
DESCRIPTION:Soutenance de thèse \nMinli Wang\, Salle de conférence du CEMES \nCompositition du jury: \n\nMme. Catherine DEJOIE\, Rapporteure\, ESRF – European Synchrotron Radiation Facility\nM. Gilles WALLEZ\, Rapporteur\, IRCP – Institut de Recherche de Chimie Paris\nM. Ludovic BELLOT-GURLET\, Examinateur\, Sorbonne Université\nMme. Fen WANG\, Examinatrice\, SUST – Shaanxi University of Science and TechnologyMme. Sophie DUHEM\, Examinatrice\, Université de Toulouse 2 Jean Jaurès\nM. Philippe\, SCIAU\, Directeur de thèse\, CEMES-CNRS\nM. Christophe FAULMANN\, Co-Directeur de thèse\, CEMES-CNRS
URL:https://fermi.univ-tlse3.fr/event/etude-de-la-microstructure-et-des-procedes-de-fabrication-de-la-porcelaine-noire-et-blanche-une-porcelaine-decorative-caracteristique-minli-wang-cemes-these-20-03-2026-9h30/
LOCATION:salle de conférence du CEMES\, CEMES - 29\, rue Jeanne Marvig BP 94347\, Toulouse\, 31055\, France
CATEGORIES:CEMES,Events,HDR / Thesis
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260319T140000
DTEND;TZID=Europe/Paris:20260319T153000
DTSTAMP:20260428T063257
CREATED:20260316T141939Z
LAST-MODIFIED:20260317T142208Z
UID:12049-1773928800-1773934200@fermi.univ-tlse3.fr
SUMMARY:Magnetoelastic effects in the 2D limit enhanced by intense magnetic fields in CrOC. - (Tristan Riccardi /  LNCMI / Seminar). - 19/03/2026\, 14H
DESCRIPTION:Seminar LNCMI \nTristan Riccardi\, LNCMI-Grenoble \nSeminar LNCMI\, 19/03/2026\, 14H\, LNCMI\, Salle Pauthenet \nAbstract\nCrOCl is a van der Waals magnet featuring a rich phase diagram [1\,2] related to its low-symmetry structure\, structural phase transitions\, and a subtle competition of interactions potentially leading to magnetic frustration. In a previously published work [3]\, we showed how\, exploiting the strong magneoelastic coupling in the material\, we can use Raman scattering spectroscopy\, performed at variable temperature and magnetic field\, to decipher the magnetic phase diagram of bulk CrOCl. \n Here we extend this work to the investigation of thin flakes of CrOCl down to the single layer. While previous works on thin layers have used transport techniques and did not show a clear evolution of the properties with the thickness [4]\, we were able to highlight strong effects of the coupling of the lattice with the external field\, leading to zone-folded phonons (produced by the magnetic supercell) or blue/red-shifts of the phonon energies at the metamagnetic transitions to build a phase diagram of the material at varying thickness. Moreover\, we were able to demonstrate the existence of a strong magnetostriction effect at high magnetic field (up to 30T)\, present for all thicknesses down to the monolayer. \nLien Zoom : https://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1\n\nReferences: \n[1] P. G. Reuvekamp. Investigation into the magnetic and the structural properties of two low-dimensional\nantiferromagnets TiPO4 and CrOCl. 2014 \n[2] P. Gu & al. Magnetic phase transitions and magnetoelastic coupling in a two- dimensional stripy\nantiferromagnet. Nano Letters. 22\, 1233–1241. 2022 \n[3] A. Pawbake & al. Magnetic Phases and Zone-Folded Phonons in a Frustrated van der Waals Magnet.\nACS Nano. 19\, 26\, 23693–23702. 2025 \n[4] M. Zhang & al. Spin-Lattice Coupled Metamagnetism in Frustrated van der Waals Magnet CrOCl. Small.\n19\, 2300964. 2023
URL:https://fermi.univ-tlse3.fr/event/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h/
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260319T110000
DTEND;TZID=Europe/Paris:20260319T123000
DTSTAMP:20260428T063257
CREATED:20260316T092508Z
LAST-MODIFIED:20260317T142028Z
UID:12028-1773918000-1773923400@fermi.univ-tlse3.fr
SUMMARY:Les capacités d’un microscope révélées par Fourier.  - (Emmanuel Soubiés / CEMES /  Seminar). - 19/03/2026\, 11 H
DESCRIPTION:Séminaire du Jeudi\, CEMES \nEmmanuel Soubiés IRIT\n \nCEMES\, 19/03/2026\, 11H \nRésumé :\nDans cet exposé\, je commencerai par introduire et illustrer un outil fondamental du traitement du signal et de l’image : la transformée de Fourier. Cet outil permet notamment d’analyser les limites de performance de systèmes d’imagerie\, autrement dit\, jusqu’où un système d’imagerie peut voir ? Dans ce contexte je m’intéresserai à deux techniques de microscopie :\n– La microscopie SIM (Structured Illumination Microscopy)\, une technique de microscopie de fluorescence qui permet de doubler la résolution des microscopes conventionnels et de dépasser la limite de diffraction. Nous verrons comment l’analyse de Fourier permet de comprendre de manière intuitive l’origine de ce gain de résolution.\n– La microscopie ISOM (Interference Scanning Optical Probe Microscopy)\, développée par Wolfgang Bacsa au CEMES. Contrairement à la SIM\, cette technique ne nécessite pas de marquage fluorescent. Je présenterai les résultats récents issus de notre collaboration\, dans lesquels nous proposons une étude théorique de la résolution atteignable par ISOM à l’aide d’une analyse de Fourier. Ces travaux mettent en évidence le potentiel de cette approche et ouvrent de belles perspectives. \nDans les deux cas\, j’évoquerai les problèmes mathématiques posés par la reconstruction des images\, et montrerai comment l’analyse de Fourier permet aussi d’orienter la conception des algorithmes.
URL:https://fermi.univ-tlse3.fr/event/les-capacites-dun-microscope-revelees-par-fourier-emmanuel-soubies-cemes-seminar-19-03-2026-11-h/
LOCATION:salle de conférence du CEMES\, CEMES - 29\, rue Jeanne Marvig BP 94347\, Toulouse\, 31055\, France
CATEGORIES:CEMES,Events,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260318T133000
DTEND;TZID=Europe/Paris:20260318T170000
DTSTAMP:20260428T063257
CREATED:20260317T092916Z
LAST-MODIFIED:20260317T142020Z
UID:12035-1773840600-1773853200@fermi.univ-tlse3.fr
SUMMARY:Impact du cycle cellulaire et de la transcription sur la dynamique de la chromatine. - (Léa Costes / LPT- CBI / Thèse). - 18/03/2026\, 13H30
DESCRIPTION:Soutenance de thèse \nLéa Costes\, LPT-CBI\nsous la direction de Prof. Kerstin BYSTRICKY (CBI) et Prof. Manoel MANGHI (LPT). \nRésumé :\nLes études d’imagerie en cellules vivantes ont montré que la chromatine présente des dynamiques hétérogènes\, reflétant la complexité de l’environnement physique et biologique du noyau. Ces mouvements résultent de l’interaction entre les fluctuations thermiques passives\, la nature polymérique de la fibre de chromatine\, et des processus actifs entraînés par des enzymes nucléaires et des machines moléculaires\, notamment la transcription\, le remodelage de la chromatine et d’autres activités dépendantes de l’ATP. Au-delà de la régulation transcriptionnelle\, la dynamique de la chromatine est également fortement influencée par le cycle cellulaire\, au cours duquel le génome subit d’importantes réorganisations structurelles et fonctionnelles associées à la réplication de l’ADN\, à la duplication de la chromatine et aux changements de l’organisation nucléaire. Dans cette thèse\, nous cherchons à élucider comment le cycle cellulaire et la transcription\, processus central de la régulation du génome\, influencent la dynamique de la chromatine. Pour répondre à ces questions\, nous combinons des simulations numériques et des approches expérimentales. Avec les simulations\, nous étudions comment la progression d’un train d’ARN polymérase II (RNAP2) le long d’un gène affecte le mouvement de la fibre de chromatine. Du point de vue expérimental\, la dynamique de la chromatine est quantifiée dans différentes conditions transcriptionnelles et à différentes phases du cycle cellulaire\, à l’aide du suivi de particules uniques de loci marqués et du suivi à grande échelle de la chromatine (Hi-D). Le mouvement de la chromatine est analysé à l’aide du déplacement quadratique moyen (MSD)\, combiné à un modèle de diffusion mixte intégrant sous-diffusion et mouvements dirigés\, permettant de dissocier les contributions passives d’origine thermique des processus actifs. À l’aide de simulations\, nous montrons que la présence d’un train de RNAP2 réduit la mobilité de la chromatine aux courtes échelles de temps\, et augmente sa mobilité aux échelles de temps longues. En effet\, la vitesse imposée du train de RNAP2 induit un mouvement dirigé de la chromatine\, dont la vitesse est proportionnelle à la vitesse de transcription. Expérimentalement\, nous observons des effets distincts de l’inhibition de la transcription sur la dynamique de la chromatine selon les conditions et les échelles spatiales. L’analyse détaillée et l’interprétation de ces résultats sont actuellement en cours. Concernant le cycle cellulaire\, nous avons observé une diminution progressive du mouvement de la chromatine de la phase S à la phase G2\, par rapport à la phase G1. Cette diminution de la dynamique n’est corrélée ni à l’activité des ADN polymérases\, ni à l’enchevêtrement progressif des chromatides sœurs par le complexe de cohésine. Il apparaît que le doublement du contenu en ADN\, et l’augmentation qui en résulte de la fraction du volume nucléaire occupée par la chromatine\, est responsable de la diminution de la diffusion de la chromatine observée en G2. Cette étude ouvre des perspectives prometteuses pour comprendre comment les fluctuations dynamiques contribuent à la régulation des fonctions nucléaires et/ou y répondent\, dans différents types cellulaires et dans des conditions normales ou pathologiques. \n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/impact-du-cycle-cellulaire-et-de-la-transcription-sur-la-dynamique-de-la-chromatine-lea-costes-lpt-cbi-these-18-03-2026-13h30/
LOCATION:Centre de Biologie Intégrative
CATEGORIES:Events,HDR / Thesis,LPT
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260317T140000
DTEND;TZID=Europe/Paris:20260317T150000
DTSTAMP:20260428T063257
CREATED:20260310T201733Z
LAST-MODIFIED:20260311T091526Z
UID:11839-1773756000-1773759600@fermi.univ-tlse3.fr
SUMMARY:Ordres concurrents dans les systèmes à plusieurs électrons : une perspective de groupe de renormalisation. - (Kilian Fraboulet / LPT / Seminar). - 17/03/2026\, 14H
DESCRIPTION:Séminaire LPT \nKilian Fraboulet  MPI-FKF\, Stuttgart \nSeminar LPT\, 17/03/2026\, 14H\, 3R4\, salle de conférence \nSummary\nThe renormalization group is an established approach to study quantum many-body systems\, and this applies especially to one of its modern implementations known as functional renormalization group (FRG). In particular\, the FRG constitutes a flexible and unbiased tool for the study of competing orders. In this talk\, I will outline recent progress in this direction for correlated electron systems. For this\, I will first discuss the competition between antiferromagnetism\, charge density waves and superconductivity in the 2D Hubbard model\, thus making a connection with cuprate superconductors. The special role of bosonization methods will also be emphasized along the way. I will also show how the FRG can be efficiently combined with dynamical mean-field theory to treat d-wave superconductivity and with density functional theory to study altermagnetism. As a next step\, I will increase the complexity of the model including non-local interactions and discuss unconventional superconductivity in an extended Hubbard model with a connection to moiré materials. Special consideration will also be given to the treatment of retarded interactions with electron-phonon couplings. Finally\, I will also highlight recent FRG studies of quantum criticality in Dirac materials\, with a connection to graphene. \n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/ordres-concurrents-dans-les-systemes-a-plusieurs-electrons-une-perspective-de-groupe-de-renormalisation-kilian-fraboulet-lpt-seminar-17-03-20265-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260313T100000
DTEND;TZID=Europe/Paris:20260313T130000
DTSTAMP:20260428T063257
CREATED:20260325T085454Z
LAST-MODIFIED:20260325T090145Z
UID:12060-1773396000-1773406800@fermi.univ-tlse3.fr
SUMMARY:Le rôle des interférences optiques dans les cellules solaires silicium/graphène.  - (Elie Rouchy / CEMES / These). - 13/03/2026\, 10H00
DESCRIPTION:Soutenance de thèse \nElie Rouchy\, Salle de conférence du CEMES \nCompositition du jury: \n\nM. Erwann FOURMOND\, Rapporteur\, INSA Lyon\nM. Yannick DAPPE\, Rapporteur\, CNRS Ile-de-France Gif-sur-Yvette\nMme Marie BRUT\, Examinatrice\, Université de Toulouse\nM. Marc RESPAUD\, invité\, INSA Toulouse\nM. Reasmey TAN\, invité\, INSA Toulouse\nM. Wolfgang BACSA\, Directeur de thèse\, Université de Toulouse
URL:https://fermi.univ-tlse3.fr/event/le-role-des-interferences-optiques-dans-les-cellules-solaires-silicium-graphen-elie-rouchy-cemes-these-13-03-2026-10h00/
LOCATION:salle de conférence du CEMES\, CEMES - 29\, rue Jeanne Marvig BP 94347\, Toulouse\, 31055\, France
CATEGORIES:CEMES,Events,HDR / Thesis
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260312T140000
DTEND;TZID=Europe/Paris:20260312T153000
DTSTAMP:20260428T063257
CREATED:20260311T090741Z
LAST-MODIFIED:20260311T090741Z
UID:12024-1773324000-1773329400@fermi.univ-tlse3.fr
SUMMARY:Investigating field-induced magnetic phases in TbB4. - (Fabienne Duc /  LNCMI / Seminar). - 12/03/2026\, 14H
DESCRIPTION:Seminar LNCMI \nFabienne Duc\, LNCMI-Toulouse \nSeminar LNCMI\, 12/03/2026\, 14H\, LNCMI-Toulouse \nAbstract\nNeutron diffraction in high magnetic fields offers a powerful and complementary approach to uncover exotic magnetic phases in frustrated systems\, providing direct insight into magnetic structures and their field-induced transformations. \nThis seminar will focus on neutron diffraction studies of TbB4\, a tetraboride compound that exhibits a rich phase diagram under applied magnetic fields. \nUsing the 2 K/40 T pulsed-field cryomagnet\, developed through collaboration between LNCMI-Toulouse\, ILL-Grenoble\, and CEA-Grenoble\, we demonstrate how high-field neutron diffraction enables the investigation of complex magnetic structures. \nThe seminar will highlight the technical progress achieved in performing such experiments\, as well as the improvements required for studying materials with small magnetic moments. \nLien Zoom : https://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1
URL:https://fermi.univ-tlse3.fr/event/investigating-field-induced-magnetic-phases-in-tbb4-fabienne-duc-lncmi-seminar-12-03-2026-14h/
LOCATION:Salle de seminaire du LNCMI\, Champs Magnétiques Pulsés\, 143 avenue de Rangueil\, Toulouse\, France
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260310T140000
DTEND;TZID=Europe/Paris:20260310T150000
DTSTAMP:20260428T063257
CREATED:20260302T100517Z
LAST-MODIFIED:20260303T092931Z
UID:11888-1773151200-1773154800@fermi.univ-tlse3.fr
SUMMARY:TBA. - (Yasmina BEDDAR / LPT / Seminar). - 10/03/2026\, 14H
DESCRIPTION:Séminaire LPT \nYasmina BEDDAR\, CNRS (DR14) \nSeminar LPT\, 10/03/2026\, 14H\, 3R4\, salle de conférence \n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/tba-yasmina-beddar-lpt-seminar-10-03-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260227T110000
DTEND;TZID=Europe/Paris:20260227T123000
DTSTAMP:20260428T063257
CREATED:20260215T082008Z
LAST-MODIFIED:20260217T092727Z
UID:11960-1772190000-1772195400@fermi.univ-tlse3.fr
SUMMARY:Listening to the millihertz Universe with the Laser Interferometer Space Antenna (LISA). - (John G. BAKER / Seminar/ SFP). - 27/02/2026\, 11H
DESCRIPTION:Séminaire SFP \nJohn G. BAKER\, Laboratoire des 2 Infinis de Toulouse\, Salle de Conférence\, Bât. 3R4 \nSummary:\nAbout a decade after the first detection of gravitational waves with ground-based observatories in 2015\, the European Space Agency has recently adopted a bold mission to realize a space-based gravitational-wave mission. The expanse of space provides a profoundly quiet environment and room for the kind of gargantuan instrument needed to listen to the universe in a new mHz band with gravitational wavelengths about 10000 times larger than those observed directly from the ground. The rumbling of the universe in this band will provide an unprecedented new perspective on the universe\, revealing new populations of sources\, more numerous\, more immense and more distant that those measured from the ground. \nThis talk will overview what LISA is expected to observe and discuss some of the efforts now underway to prepare for scientific analysis of LISA’s data following launch planned for 2035 \nAffiche presentation séminaire SFP\, John G. Baker \n 
URL:https://fermi.univ-tlse3.fr/event/listening-to-the-millihertz-universe-with-the-laser-interferometer-space-antenna-lisa-john-g-baker-seminar-sfp-27-02-2026-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,Seminars,SFP / SFC
ATTACH;FMTTYPE=image/jpeg:https://fermi.univ-tlse3.fr/wp-content/uploads/2026/02/SFP_Baker_27_02_2026.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260224T140000
DTEND;TZID=Europe/Paris:20260224T153000
DTSTAMP:20260428T063257
CREATED:20260216T103211Z
LAST-MODIFIED:20260217T092721Z
UID:11873-1771941600-1771947000@fermi.univ-tlse3.fr
SUMMARY:Structure de l’intrication multipartite des états quantiques aléatoires et gravité. - (Simon Lin / LPT / Seminar). -24/02/2026\, 14H
DESCRIPTION:Séminaire LPT \nSimon Lin \,NYU Abu Dhabi) \nSeminar LPT\, 24/02/2026\, 14H\, 3R4\, salle de conférence \nAbstract\nEntanglement is the defining feature of a quantum system where different parts of the system cannot be factorized as a product. In terms of bipartite entanglement\, there are clear diagnostics for whether a system is entangled or not. The situation for multipartite entanglement is less understood. In my talk I will discuss different diagnostics of multipartite entanglements that can be formulated as symmetrized contractions of density matrices of the system: Reflected entropy and (genuine) multi-entropy. For random tensor network states\, these signals can be calculated using the replica trick and be reformulated as a combinatorial optimization problem\, allowing explicit evaluation in the large $N$ limit. This in turn leads to interesting connections to minimal cut problems on the graph defining the tensor network. Implications for holography and quantum gravity will also be discussed
URL:https://fermi.univ-tlse3.fr/event/tba-simon-lin-lpt-seminar-24-02-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260210T140000
DTEND;TZID=Europe/Paris:20260210T150000
DTSTAMP:20260428T063257
CREATED:20260207T045156Z
LAST-MODIFIED:20260209T131732Z
UID:11801-1770732000-1770735600@fermi.univ-tlse3.fr
SUMMARY:Corrélations électroniques modulables dans 135 métaux Kagomé. - (Matteo Crispino / LPT / Seminar). -10/02/2026\, 14H
DESCRIPTION:Séminaire LPT \nMatteo Crispino ((Université de Wurtzbourg) \nSeminar LPT\, 10/02/2026\, 14H\, 3R4\, salle de conférence \nSummary : \nKagome metals exhibit rich correlated-electron physics\, yet a systematic understanding of the degree of correlation across transition-metal species remains elusive. Using density-functional theory plus multi-orbital slave-spin mean-field theory\, we investigate electronic correlations in the Ti-\, V-\, and Cr-based 135 compounds with Sb and Bi pnictogens. We find that the significantly stronger degree of correlation of the Cr-based materials compared to Ti and V can only be explained through the synergy of two effects: the larger electron filling of the d-shell and the reduced characteristic kinetic energy. We put forward that the substitution of Sb with Bi strengthens correlations in all compounds and make the prediction that the-yet-to-be-synthesized CsCr3Bi5 must be the most strongly correlated member of the entire family. These findings provide a quantitative\, band-structure-based framework for understanding and predicting correlation strength in Kagome metals.
URL:https://fermi.univ-tlse3.fr/event/tba-matteo-crispino-lpt-seminar-10-02-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260210T100000
DTEND;TZID=Europe/Paris:20260210T130000
DTSTAMP:20260428T063257
CREATED:20260209T131227Z
LAST-MODIFIED:20260209T131326Z
UID:11919-1770717600-1770728400@fermi.univ-tlse3.fr
SUMMARY:Imagerie d’ondes de spins par holographie électronique.  - (Marine Resano / CEMES / These). - 10/02/2026\, 10H00
DESCRIPTION:Soutenance de thèse \nMarine Resano\, Salle de conférence du CEMES \nCompositition du jury: \n\n\n\n\n\n\n\n\nM. Mohamed Belmeguenai – Rapporteur\, LSPM\, Université Sorbonne Paris Nord\nM. César Magén – Rapporteur\, Instituto de Nanociencia y Materiales de Aragón (INMA) Universidad de Zaragoza-CSIC\nMme Laurence Ressier\, – Examinatrice\, LPCNO – INSA Toulouse\nM. André Thiaville\, – Examinateur\, LPS\nM. Christophe Gatel – Co-Directeur de thèse\, CEMES\nM. Nicolas Biziere – Co-Directeur de thèse\, CEMES\nM. Benjamin Lassagne – LPCNO\, INSA Toulouse
URL:https://fermi.univ-tlse3.fr/event/imagerie-dondes-de-spins-par-holographie-electronique-marine-resano-cemes-these-10-02-2026-10h00/
LOCATION:salle de conférence du CEMES\, CEMES - 29\, rue Jeanne Marvig BP 94347\, Toulouse\, 31055\, France
CATEGORIES:CEMES,Events,HDR / Thesis
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260205T140000
DTEND;TZID=Europe/Paris:20260205T150000
DTSTAMP:20260428T063257
CREATED:20260127T075930Z
LAST-MODIFIED:20260130T064704Z
UID:11890-1770300000-1770303600@fermi.univ-tlse3.fr
SUMMARY:Active space coupled cluster approaches and the eT program. - (Sarai Folkestad / LCPQ / Seminar). - 5/02/2026\, 14H
DESCRIPTION:Séminaire du LCPQ \nSarai Folkestad NTNU \nSeminar LCPQ\, 5/02/2026\, 14H \nAbstact :\nThe seminar will discuss the framework of multilevel and active space coupled cluster models\, their usefulness and limitations\, and the potential computational savings they can provide. The design choices and specialized features of the electronic structure program\, eT\, that ensure efficient active space calculations will also be discussed.  \n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/active-space-coupled-cluster-approaches-and-the-et-program-sarai-folkestad-lcpq-seminar-5-02-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LCPQ,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260205T140000
DTEND;TZID=Europe/Paris:20260205T150000
DTSTAMP:20260428T063257
CREATED:20260127T064551Z
LAST-MODIFIED:20260130T064713Z
UID:11892-1770300000-1770303600@fermi.univ-tlse3.fr
SUMMARY:Direct Determination of Magnetic Anisotropies in Pnictinidenes and Fe(II) compounds from 3 to 6000 cm^-1 by THz-EPR Spectroscopy. - (Tarek Al Said /  LNCMI / Seminar). - 5/02/2026\, 14H
DESCRIPTION:Seminar LNCMI \nTarek Al Said \, Helmholtz-Zentrum Berlin für Materialien und Energie \nSeminar LNCMI\, 5/02/2026\, 14H\, Visio \nAbstract\nThe magnetic anisotropy (zero-field splitting\, ZFS) of a molecular compound is a sensitive probe for the electronic structure and can further present an important property of functional materials.\nFor example\, probing the typically large ZFS in high-spin (HS) Fe(II) compounds\, gives inside in the function of related metalloenzymes or spin-crossover (SCO) compounds [1\,2].\nIn molecular magnetism\, a large magnitude of the anisotropy is desired to increase the spin-reversal barrier [3].\nFor an accurate determination\, electron paramagnetic resonance (EPR) spectroscopy is the method of choice\, however large ZFS poses serve experimental challenges for conventional EPR methods. \nTo study species with large magnetic anisotropy\, we employ frequency-domain Fourier-transform THz-EPR (FD-FT THz-EPR) spectroscopy at BESSY II [4] in a range from 3 to 6000 cm^-1 and at magnetic fields up to 10 T in conjunction with optical excitation.\nIn this talk\, examples on recent research on HS main group and transition metal compounds will be given. First\, we show the EPR characterization of two mononuclear HS Fe(II) complexes [5]\,\nwhich serve as models for SCO compounds\, and give an outlook on the possibilities to study thermally and light-induced SCO by THz-EPR.\nSecond\, studies on different triplet pnictinidenes (R–Pn\, Pn = As\,Bi) reveal the influence of adjacent metal atoms and SOC on the electronic structure of metallo-arsinidenes (Pt– As\, Pd–As) [6]\nand demonstrate the determination of a giant axial ZFS of +5422 cm^-1 in a bismuthinidene (R–Bi) [7]\, to the best of our knowledge\, the largest value experimentally determined up to now. \nThereby\, our studies establish FD-FT THz-EPR as a unique method to probe very large ZFS in order to draw robust magneto-structural correlations with implications for new magnetic materials. \n[1] A. Ozarowski et al.\, J. Am. Chem. Soc 2004\, 126\, 6574.\n[2] P. Gütlich et al.\, Beilstein J. Org. Chem. 2013\, 9\, 342\n[3] F. Neese and D. Pantazis\, Faraday Discuss. 2011\, 148\, 229.\n[4] J. Nehrkorn et al.\, J. Magn. Res. 2017\, 280\, 10.\n[5] Manuscript in preparation\n[6] M. Deben et al.\, J. Am. Chem. Soc 2025\, 147\, 5330.\n[7] T. Al Said et al.\, J. Am. Chem. Soc 2025\, 147\, 84. \nLieu : Salle Pauthenet in Grenoble \nLien Zoom : \nhttps://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1
URL:https://fermi.univ-tlse3.fr/event/direct-determination-of-magnetic-anisotropies-in-pnictinidenes-and-feii-compounds-from-3-to-6000-cm-1-by-thz-epr-spectroscopy-tarek-al-said-lncmi-seminar-5-02-2026-14h/
LOCATION:Visio
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260203T140000
DTEND;TZID=Europe/Paris:20260203T153000
DTSTAMP:20260428T063257
CREATED:20260128T084640Z
LAST-MODIFIED:20260130T064658Z
UID:11796-1770127200-1770132600@fermi.univ-tlse3.fr
SUMMARY:Conductivité de Hall thermique dans les aimants quantiques à partir de l’équation cinétique. - (Léo Mangeolle / LPT / Seminar). -3/02/2026\, 14H
DESCRIPTION:Séminaire LPT \nLéo Mangeolle (Université technique de Munich) \nSeminar LPT\, 3/02/2026\, 14H\, 3R4\, salle de conférence \nSummary\nThermal Hall conductivity has recently emerged as an experimentally accessible property of insulating materials. Theoretical understanding thereof has remained a challenge\, in particular since the breaking of time-reversal symmetry by neutral particles is nontrivial and can emerge from multiple mechanisms (intrinsic semiclassical dynamics\, skew-scattering\, disorder side-jump effects\, etc). In this seminar\, I will show that many of these effects can be studied together within a kinetic (Boltzmann-like) formalism. First\, I will briefly discuss inelastic skew-scattering of energy-carrying bosons by other collective excitations\, with applications to phonon-magnon interactions in antiferromagnets. Second\, I will present how anomalous contributions to the semiclassical dynamics of carriers can be incorporated in a rigorous way\, yielding the intrinsic thermal Hall effect of chiral bosons (e.g. magnons in frustrated magnets). Finally\, I will discuss side-jump phenomena\, a mixed effect of disorder scattering and semiclassical dynamics that may explain some puzzling experimental facts.
URL:https://fermi.univ-tlse3.fr/event/tba-leo-mangeolle-lpt-seminar-3-02-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260202T140000
DTEND;TZID=Europe/Paris:20260202T153000
DTSTAMP:20260428T063257
CREATED:20260129T101942Z
LAST-MODIFIED:20260130T064652Z
UID:11871-1770040800-1770046200@fermi.univ-tlse3.fr
SUMMARY:A geometric picture of excited states in variational theories. - (Laura Grazioli / LCPQ / Seminar). - 2/02/2026\, 14H
DESCRIPTION:Séminaire du LCPQ \nLaura Grazioli CERMICS\, Paris \nSeminar LCPQ\, 2/02/2026\, 14H \nSummary :\nIn exact theory\, excited states correspond to higher-energy solutions of the Schrödinger equation. For an exact wave function\, these states appear as saddle points of the electronic energy functional\, and for a Morse function they can be classified by the number of negative eigenvalues of the Hessian matrix—the nth excited state having Morse index n. When the linear Schrödinger equation is solved within a nonlinear wave-function parameterization\, however\, spurious critical points may emerge. \nTo address this\, we develop manifold-constrained saddle-point search algorithms defined on the manifold of admissible electronic states. These methods target saddle points of fixed index k. A global exploration of the energy landscape is first performed using stochastic algorithms adapted to Riemannian manifolds\, to identify regions likely to contain saddle points. Within these regions\, local critical-point algorithms are then employed\, relying on the Riemannian gradient and selected information from the Riemannian Hessian. A careful treatment of the underlying manifold geometry is essential in both stages\, enabling the construction of stable algorithms for locating saddle points\, which are naturally unstable. \nIn quantum chemistry\, excited states are also commonly computed through linear response theory\, which analyses the linearized dynamics around a stable ground state. Although linear response formulations exist for many variational theories\, their derivations are often technically involved and rely on ad-hoc constructions. We provide a unified derivation for variational theories by exploiting the geometric structure of Kähler manifolds. \nBoth excited-state characterisations—saddle-point theory and linear response theory—are developed and applied first within Hartree–Fock theory\, represented by a Grassmann manifold\, and subsequently within Complete Active Space Self-Consistent Field (CASSCF) theory\, represented by a flag manifold. \n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/a-geometric-picture-of-excited-states-in-variational-theories-laura-grazioli-lcpq-seminar-2-02-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LCPQ,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260130T110000
DTEND;TZID=Europe/Paris:20260130T123000
DTSTAMP:20260428T063257
CREATED:20260130T054820Z
LAST-MODIFIED:20260130T064646Z
UID:11854-1769770800-1769776200@fermi.univ-tlse3.fr
SUMMARY:Interactions robotiques avec les surfaces planétaires et celles des petits corps : défis et enseignements tirés. - (Cecily Sunday / FeRMI / Séminaire). -30/01/2026\, 11H
DESCRIPTION:Séminaire FeRMI \nCecily Sunday\,  ISAE-Supaéro \nNote : Cecily Sunday fait partie des cinq chercheuses américaines ayant bénéficié en 2025 du dispositif d’accueil « Toulouse Safe place for Science » porté par TIRIS\, la Région Occitanie et l’UT (https://tiris.univ-toulouse.fr/aap/toulouse-safe-place-for-science-fr/) \nRésumé :\nLes opérations spatiales robotiques in situ\, telles que l’atterrissage\, l’échantillonnage et la mobilité de surface\, ont fourni des informations précieuses sur la formation et l’évolution des corps célestes de notre Système solaire. Toutefois\, en raison des importantes variations de gravité\, d’atmosphère et des propriétés de surface\, les interactions entre les engins spatiaux et le sol se déroulent rarement comme prévu. Dans ce séminaire\, nous discuterons des défis associés aux opérations robotiques sur les surfaces planétaires et celles des petits corps dans des environnements à faible gravité\, en tirant des enseignements des missions passées vers la Lune\, Mars\, les comètes et les astéroïdes. Nous nous concentrerons sur les interactions avec les matériaux granulaires (régolithe) et montrerons comment les théories et modèles existants peuvent être révisés afin de mieux rendre compte du rôle de la gravité. \n 
URL:https://fermi.univ-tlse3.fr/event/interactions-robotiques-avec-les-surfaces-planetaires-et-celles-des-petits-corps-defis-et-enseignements-tires-cecily-sunday-fermi-seminaire-30-01-2026-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,FeRMIsem,Seminars
END:VEVENT
END:VCALENDAR