BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//FeRMI - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
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:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20230326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20231029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230106T100000
DTEND;TZID=Europe/Paris:20230106T123000
DTSTAMP:20260513T213653
CREATED:20230105T051856Z
LAST-MODIFIED:20230105T073012Z
UID:8738-1672999200-1673008200@fermi.univ-tlse3.fr
SUMMARY:Propriétés spectrales des canaux quantiques aléatoires (Ion Nechita / HDR / LPT). - 6/01/2023\, 10H
DESCRIPTION:Soutenance de HDR \nIion Nechita \nLieu : Amphithéâtre Schwartz de l’IMT\, Bat. 1R3
URL:https://fermi.univ-tlse3.fr/event/proprietes-spectrales-des-canaux-quantiques-aleatoires-ion-nechita-hdr-lpt-6-01-2023/
LOCATION:Amphithéâtre Schwartz de l’IMT\, Bat. 1R3
CATEGORIES:Events,HDR / Thesis,LPT
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230109T093000
DTEND;TZID=Europe/Paris:20230109T123000
DTSTAMP:20260513T213653
CREATED:20230108T072842Z
LAST-MODIFIED:20230109T072245Z
UID:8745-1673256600-1673267400@fermi.univ-tlse3.fr
SUMMARY:Novel Prospects of Image Restoration Inspired by Concepts of Quantum Mechanics (Sayantan DUTTA / Thesis / LPT). - 9/01/2023\, 9H30
DESCRIPTION:Sayantan DUTTA\, Equipe MINDS IRIT et Equipe Cohérence quantique LPT \n \nLieu : Auditorium J. Herbrand – IRIT  \net Lien zoom :\nhttps://univ-tlse3-fr.zoom.us/j/88599330360?pwd=RUJ5TUc2V2tMWWtnNSt6cUIxN0JWUT09\nID de réunion : 885 9933 0360\nCode secret : 114975 \nAbstract : Decomposition of digital images into other basis or dictionaries than time or space domains is a very common and effective approach in image processing and analysis. Such a decomposition is commonly obtained using fixed transformations (e.g.\, Fourier or wavelet) or dictionaries learned from example databases or from the signal or image itself. In recent years\, with the growth of computing power\, data-driven strategies exploiting the redundancy within patches extracted from one or several images to increase sparsity have become more prominent. They have demonstrated very promising image restoration results. The question to pursue in this thesis is how to design such an adaptive transformation based on principles of quantum mechanics. \nIn this thesis\, we explore new possibilities of constructing such image-dependent bases inspired by quantum mechanics. First\, we construct an image-dependent basis using the wave solutions of the Schrödinger equation\, in particular\, by considering the image as a potential in the discretized Schrödinger equation. The efficiency of the proposed decomposition is illustrated through denoising results in the case of Gaussian\, Poisson\, and speckle noises and compared to the state-of-the-art algorithms. We further generalize our proposed adaptive basis by exploiting the data-driven strategy inspired by quantum many-body theory. Based on patch analysis\, the similarity measures in a local image neighborhood are formalized through a term akin to interaction in quantum mechanics that can efficiently preserve the local structures of real images. The versatile nature of this adaptive basis extends the scope of its application to image-independent or image-dependent noise scenarios without any adjustment. We carry out a rigorous comparison with contemporary methods to demonstrate the denoising capability of the proposed algorithm regardless of the image characteristics\, noise statistics and intensity. We show the ability of our approaches to deal with real-medical data such as clinical dental computed tomography image denoising and medical ultrasound image despeckling applications. We further extend our work to image deconvolution and super-resolution tasks exploiting our proposed quantum adaptive denoisers. In particular\, following recent developments\, we impose these external denoisers as a prior functions within the Plug-and-Play and Regularization by Denoising approaches. \nLastly\, we present a deep neural network architecture unfolding our proposed baseline adaptive denoising algorithm\, relying on the theory of quantum many-body physics. The key ingredients of the proposed method are on one hand\, its ability to handle non-local image structures through the patch-interaction term and the quantum-based Hamiltonian operator\, and\, on the other hand\, its flexibility to adapt the hyperparameters patch wisely\, due to the training process. Furthermore\, it is shown that with very slight modifications\, this network can be enhanced to solve more challenging image restoration tasks such as image deblurring\, super-resolution and inpainting. Despite a compact and interpretable (from a physical perspective) architecture\, the proposed deep learning network outperforms several recent benchmark algorithms from the literature\, designed specifically for each task. Finally\, we address the problem of clinical cardiac ultrasound image enhancement to demonstrate the potential of our proposed deep unfolded network in real-world medical applications. \n 
URL:https://fermi.univ-tlse3.fr/event/novel-prospects-of-image-restoration-inspired-by-concepts-of-quantum-mechanics-sayantan-dutta-thesis-lpt-9-01-2023-9h30/
CATEGORIES:Events,HDR / Thesis,LPT
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230111T100000
DTEND;TZID=Europe/Paris:20230111T130000
DTSTAMP:20260513T213653
CREATED:20230116T081810Z
LAST-MODIFIED:20230116T081810Z
UID:8768-1673431200-1673442000@fermi.univ-tlse3.fr
SUMMARY:Effet d’éléments d’alliage en substitution et en insertion sur les mécanismes de déformation et sur la tenue mécanique d’intermétalliques TiAl à haute température (Benjamin Galy / Cemes / Theses). - 11/01/2023
DESCRIPTION:Benjamin Galy (CEMES)\n\n\n\n\nLe jury sera composé de : \n\n\n\nJosé Maria SAN JUAN – Université du Pays Basque\, Espagne (Rapporteur)\nJean-Philippe COUZINIE – ICMPE Thiais (Rapporteur)\nBernard VIGUIER – CIRIMAT Toulouse (Examinateur)\nEmmanuel BOUZY – LEM3 Metz (Examinateur)\nFlorence PETTINARI-STURMEL – Université Paul Sabatier Toulouse (Examinatrice)\nJean Philippe MONCHOUX – CEMES Toulouse (Directeur de thèse)\nMuriel HANTCHERLI – INSA Toulouse (Co-Directrice de thèse)\nAlain COURET – CEMES Toulouse(Invité)\n\n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/effet-delements-dalliage-en-substitution-et-en-insertion-sur-les-mecanismes-de-deformation-et-sur-la-tenue-mecanique-dintermetalliques-tial-a-haute-temperature-benjamin-gal/
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:20230112T140000
DTEND;TZID=Europe/Paris:20230112T160000
DTSTAMP:20260513T213653
CREATED:20230108T030044Z
LAST-MODIFIED:20230109T073107Z
UID:8549-1673532000-1673539200@fermi.univ-tlse3.fr
SUMMARY:New strategies for density functional calculations of excited states and application to ultrafast photoreactions in solution (Gianluca Levi/ LCPQ / Seminar) – 12/01/2023\, 14 H
DESCRIPTION:Gianluca Levi\, from the Science Institute of the University of Iceland \n  \nSummary : \n \nSimulating photochemical processes requires methods that can describe different types of electronic excitations and their nuclear energy surfaces. Variational density functional calculations where excited states are obtained as high energy solutions of the Kohn-Sham (KS) equations are emerging as a powerful tool. They have the same computational cost as ground state calculations\, provide analytical atomic forces\, and\, thanks to state-specific orbital relaxation\, can describe a broad range of excitations\, including charge transfer\, Rydberg and doubly excited states. Compared to the ground state\, it is\, however\, more challenging to obtain excited state solutions. First\, excited states typically correspond to saddle points on the multidimensional surface given by the variation of the energy as a function of many electronic degrees of freedom (the orbital rotations). Second\, excited states often display degeneracies\, which lead to convergence issues for common self-consistent field procedures based on eigensolvers.\nThe talk will illustrate the methodologies that we have developed for variational density functional calculations of excited states1\,2\, which\, instead of solving the KS eigenvalue problem\, directly optimize the orbitals by finding the orbital rotations that make the energy stationary. In this way\, the calculations can be tailored to converge to saddle points on the electronic energy surface. The methods employed include efficient quasi-Newton algorithms and a robust mode following approach generalized to target saddle points of any order. The new methodologies made it possible to explore energy surfaces close to conical intersections and avoided crossings3\, and to assess the performance of semilocal functionals on charge transfer excitations in organic molecules. We further use the direct optimization methods in multiscale molecular dynamics simulations of the photochemical dynamics of solvated molecules to aid the interpretation of time-resolved X-ray scattering experiments performed at large scale synchrotron and X-ray free electron laser facilities. As an example\, the talk will show how the simulations made it possible to elucidate the rearrangement of the solvent following photoexcitation of a copper photosensitizer and how it influences the ligand dynamics and photosensitizing properties of the complex4. \n[1] A. V. Ivanov\, G. Levi\, E.  Ö. Jónsson\, and H. Jónsson\, J. Chem. Theory and Comput. 17\, 5034 (2021).\n[2] G. Levi\, A. V. Ivanov\, and H. Jónsson\, J. Chem. Theory Comput. 16\, 6968 (2020).\n[3] Y. L. A. Schmerwitz\, A. V. Ivanov\, E. Ö. Jónsson\, H. Jónsson\, and G. Levi\, J. Chem. Theory and\nComput. 13\, 3990 (2022).\n[4] G. Levi\, E. Biasin\, A. O. Dohn\, and H. Jónsson\, Phys. Chem. Chem. Phys. 22\, 748 (2020). \n 
URL:https://fermi.univ-tlse3.fr/event/new-strategies-for-density-functional-calculations-of-excited-states-and-application-to-ultrafast-photoreactions-in-solution-gianluca-levi-lcpq-seminar-12-01-2023-14-h/
CATEGORIES:Events,LCPQ,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230113T110000
DTEND;TZID=Europe/Paris:20230113T123000
DTSTAMP:20260513T213653
CREATED:20230107T075340Z
LAST-MODIFIED:20230109T075402Z
UID:8755-1673607600-1673613000@fermi.univ-tlse3.fr
SUMMARY:Non equilibrium physics with quantum fluids of light (Quentin Glorieux /  LCAR / Seminar). - 13/01/23\, 11H
DESCRIPTION:Quentin Glorieux (Laboratoire Kastler Brossel (LKB)\, Ecole Normal Supérieur – Sorbonne Université – CNRS\, Paris\, France) \nSéminaire\, vendredi 13 janvier 2023 11H. – Salle de séminaire\, 3R1\, 3ème étage \nRésumé :\nHot atomic vapors are widely used in non-linear and quantum optics due to their large Kerr non-linearity. This non-linearity induces effective photon-photon interactions allowing light to behave as a fluid displaying quantum properties such as superfluidity. In this presentation\, I will show that we have full control over the Hamiltonian that drives the system and that we can engineer an analogue simulator with light. In particular\, I will discuss 2 experiments:\n1– Observation of a pre-thermal state in a 2D quantum fluid and the analogy with non-equilibrium BKT physics\n2– Emergence of isotropy and inverse energy cascade in a 2D turbulent fluid light
URL:https://fermi.univ-tlse3.fr/event/non-equilibrium-physics-with-quantum-fluids-of-light-quentin-glorieux-lcar-seminar-13-01-23-11h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LCAR,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230124T140000
DTEND;TZID=Europe/Paris:20230124T153000
DTSTAMP:20260513T213653
CREATED:20230123T070038Z
LAST-MODIFIED:20230123T093722Z
UID:8680-1674568800-1674574200@fermi.univ-tlse3.fr
SUMMARY:Suppression of Heating due to Emergence of Local Conservation Laws in Clean Interacting Floquet Quantum Matter (Asmi Haldar / Seminar / LPT). - 24/01/2023
DESCRIPTION:Asmi Haldar (MPIPKS\, Dresden) \nSeminar LPT\, Tuesday January 24\, 2023 – 14:00 – Seminar room\, 3R1 – 3rd floor \n  \nAbstract: We consider a clean quantum system subject to strong periodic driving. The existence of a dominant energy scale\, hxD\, can generate considerable structure in an effective description of a system that\, in the absence of the drive\, is nonintegrable and interacting\, and does not host localization. In particular\, we uncover a threshold of drive strength beyond which the system transits sharply from a quantum chaotic to a dynamically frozen regime. We identify special points of freezing in the space of drive parameters (frequency and amplitude). At those points\, the dynamics is severely constrained due to the emergence of an almost exact\, local conserved quantity\, which scars the entire Floquet spectrum by preventing the system from heating up ergodically\, starting from any generic state\, even though it delocalizes over an appropriate subspace. At large drive frequencies\, where a naïve Magnus expansion would predict a vanishing effective (average) drive\, we devise instead a strong-drive Magnus expansion in a moving frame. There\, the emergent conservation law is reflected in the appearance of the « integrability » of an effective Hamiltonian. These results hold for a wide variety of Hamiltonians\, including the Ising model in a transverse field in any dimension and for any form of Ising interaction. The phenomenon is also shown to be robust in the presence of two-body Heisenberg interactions with any arbitrary choice of couplings. Furthermore\, we construct a real-time perturbation theory that captures resonance phenomena where the conservation breaks down\, giving way to unbounded heating. This approach opens a window on the low-frequency regime where the Magnus expansion fails. Finally\, using iTEBD we demonstrate the persistence of the threshold\, and the conservation law beyond it in infinite systems.
URL:https://fermi.univ-tlse3.fr/event/tba-asmi-haldar-seminar-lpt-24-01-2023/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230127T113000
DTEND;TZID=Europe/Paris:20230127T130000
DTSTAMP:20260513T213653
CREATED:20230125T134847Z
LAST-MODIFIED:20230125T134847Z
UID:8806-1674819000-1674824400@fermi.univ-tlse3.fr
SUMMARY:Nanomagnétisme au cœur du vivant\, un outil pour les thérapies cellulaires et l'ingénierie tissulaire (Claire Wilhelm / Seminar/ SFP). - 27/01/2023\, 11H30
DESCRIPTION:Claire Wilhelm (Laboratoire de Physico-Chimie Institut Curie\, Sorbonne Université\, PSL University\, Paris) \nLieu : Salle de séminaire\, 3ème étage du bâtiment 3R1 – B4 \nRésumé : \nLa plupart des organismes vivants sont insensibles aux champs magnétiques. Cependant\, certains animaux et surtout bactéries possèdent un système de navigation magnétique\, grâce des cristaux de magnétite qui agiraient comme des boussoles internes. Si l’on trouve également quelques cristaux magnétiques dans le cerveau humain\, un sens magnétique chez l’homme reste encore à démontrer. En revanche\, il est possible d’introduire artificiellement ces cristaux magnétiques au sein du vivant afin de pouvoir le manipuler. Une telle approche a ouvert la voie à des nombreuses applications dans le domaine biomédical\, exploitant les propriétés magnétiques d’aimantation\, d’attraction ou encore d’excitation par un champ magnétique. \nCes propriétés inédites pour le vivant permettent d’imaginer toutes sortes de manipulations à distance pour sonder ou imager les cellules\, exercer une action thérapeutique\, ou façonner des tissus par exemple. Dans cette utilisation de nano-outils magnétiques pour le domaine biomédical\, le point de vue fondamental reste central : manipuler la matière vivante par des effets purement physiques peut mener à une nouvelle compréhension des phénomènes dynamiques du vivant. Les applications sont multiples pour la médecine de demain : pour le diagnostic (nanocapteurs\, nanotraceurs pour l’imagerie médicale)\, pour la thérapie (ciblage magnétique d’agents thérapeutiques\, hyperthermie intracellulaire) et pour la réparation tissulaire (prothèses magnétiques\, ingénierie tissulaire …). Néanmoins\, la question de la toxicité potentielle des nanoparticules au cœur des cellules et de leur devenir sur le long-terme reste une question sociétale centrale. Grâce à la physique et à des approches de nano-magnétisme en milieu vivant\, il est possible de décortiquer le cycle de vie des nanoparticules dans l’environnement biologique\, afin de connaitre\, au mieux\, leur devenir et les possibles effets que ces nanomatériaux produisent. \nVoir ici  \n\n 
URL:https://fermi.univ-tlse3.fr/event/nanomagnetisme-au-coeur-du-vivant-un-outil-pour-les-therapies-cellulaires-et-lingenierie-tissulaire-claire-wilhelm-seminar-sfp-27-01-2023-11h30/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,Seminars,SFP / SFC
END:VEVENT
END:VCALENDAR