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DTSTART;TZID=Europe/Paris:20260203T140000
DTEND;TZID=Europe/Paris:20260203T153000
DTSTAMP:20260523T005910
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260210T140000
DTEND;TZID=Europe/Paris:20260210T150000
DTSTAMP:20260523T005910
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:20260224T140000
DTEND;TZID=Europe/Paris:20260224T153000
DTSTAMP:20260523T005910
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
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