LPT

Natalia Chepiga (TU Delft) Seminar LPT, 25 avril 2023, 14H, 3R1, seminar room, 3rd floor Summary : I will present our recent study of the critical properties of a Majorana chain in the presence of two competing interactions of the shortest possible range. The obtained phase diagram is very rich and contains nine different phases,… Read More »Propriétés critiques de la chaîne de Majorana avec des interactions concurrentes. – (Natalia Chepiga / LPT / Seminar). – 25/04/2023, 14H

Alexandre Bouzdine (LOMA, Bordeaux) Seminar LPT, 16 mai 2023, 14H, the new conference room, building 3R4 Résumé : Although the average properties of the vortex matter in superconductors can be tuned with magnetic fields, temperature, or electric currents, handling individual Abrikosov vortices remains challenging and has been demonstrated only with sophisticated scanning local probe microscopies.… Read More »Optical methods of flux manipulation in superconductors. – (Alexandre Bouzdine / Seminar / LPT). – 16/05/2023, 14H

Danny Laghi (L2iT) Seminar LPT, 23 mai 2023, 14H, 3R1, seminar room, 3rd floor Résumé : Dans ce séminaire, je passerai en revue les bases du Nested Sampling, un algorithme de statistique bayésienne alternatif aux méthodes de Monte Carlo par chaînes de Markov. Cet algorithme permet de calculer l’évidence bayésienne sous la forme d’une intégrale… Read More »Nested Sampling : une revue de la théorie et des applications . – (Danny Laghi / LPT / Seminar). – 23/05/2023, 14H

Gilles Parez (Université de Montréal) Seminar LPT, 30 mai 2023, 14H, 3R1, seminar room, 3rd floor Résumé : Entanglement and separability are two opposite yet intertwined notions in quantum mechanics. A quantum state is said to be entangled if it is not separable, and vice versa. Quantifying how entangled two subsystems are remains a challenging… Read More »Entanglement and separability of Rokhsar-Kivelson and resonating valence-bond states . – (Gilles Parez / LPT / Seminar). – 30/05/2023, 14H

Anna Francuz (Université de Vienne) Seminar LPT, 13/06/2023, 14H, 3R1, seminar room, 3rd floor Summary : Tensor networks have already proven to be extremely useful tools in the studies of strongly correlated quantum systems. Being immune to the sign problem, they enable calculations beyond Quantum Monte Carlo and directly in the thermodynamic limit. The most… Read More »Automatic differentiation in iPEPS simulations : unravelling the black box . – (Anna Francuz / LPT / Seminar). – 13/06/2023, 14H

In this presentation, I will talk about my experience in the financial sector. After reviewing some aspects of the financial markets, I will focus on the areas where a physicist (or a mathematician) can make use of his/her scientific skills to help

Haruki Watanabe (EUniversité de Tokyo) Seminar LPT, 05/09/2023, 14H, 3R1, seminar room, 3rd floor Summary : In this talk, I will introduce two series of simple spin models with unusual properties. The first one is a modified Toric code that may have a unique ground state under periodic boundary condition, despite its nontrivial topological order… Read More »Deux modèles de spin aux propriétés inattendues – (Haruki Watanabe / LPT / Seminar). – 05/09/2023, 14H

Félix Werner (ENS, LKB) Seminar LPT, 19/09/2023, 14H, 3R1, seminar room, 3rd floor Summary : In contrast to conventional QMC methods, expansions of intensive quantities in series of connected Feynman diagrams can be formulated directly in the thermodynamic limit. Over the last decade, diagrammatic Monte Carlo algorithms made it possible to reach large expansion orders… Read More »High-order diagrammatic expansion around BCS Hamiltonians : Polarized superfluid phase of the attractive Hubbard model – (Félix Werner / LPT / Seminar). – 19/09/2023, 14H