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DTSTART;TZID=Europe/Paris:20251209T140000
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DTSTAMP:20260412T152842
CREATED:20251207T175048Z
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UID:11772-1765288800-1765294200@fermi.univ-tlse3.fr
SUMMARY:Les ressources de magie fermionique dans les systèmes quantiques à plusieurs corps. - (Piotr Sierant/ LPT / Seminar). - 9/12/2025\, 14H
DESCRIPTION:Séminaire LPT \nPiotr Sierant ((Centro nacional de Supercomputación\, Barcelone) \nSeminar LPT\, 9/12/2025\, 14H\, 3R4\, salle de conférence \nSummary\nUnderstanding the complexity and non-classical features of quantum states is a central challenge in quantum many-body physics. In qubit systems\, fermionic Gaussian states can be efficiently simulated on classical computers and thus provide a natural baseline for assessing quantum complexity. In this talk\, based on [arXiv:2506.00116]\, I will briefly introduce the idea of magic state resource theories and then focus on a framework for quantifying fermionic magic resources\, also known as fermionic non-Gaussianity. I will describe the algebraic structure of the fermionic commutant and introduce fermionic antiflatness (FAF)\, an efficiently computable and experimentally accessible measure of fermionic non-Gaussianity with a clear physical interpretation in terms of Majorana fermion correlation functions. I will argue that FAF detects phase transitions\, reveals universal features of critical points\, and identifies special solvable points in many-body systems. Extending to out-of-equilibrium settings\, I will show that fermionic magic resources proliferate in highly excited eigenstates\, and I will describe the growth and saturation of FAF under ergodic dynamics\, emphasizing how conservation laws and locality constrain the increase of non-Gaussianity during unitary evolution. The main goal of this talk is to present fermionic non-Gaussianity\, alongside entanglement and non-stabilizerness\, as a resource relevant not only for foundational studies of quantum many-body systems but also for experimental platforms aiming at quantum advantage.
URL:https://fermi.univ-tlse3.fr/event/les-ressources-de-magie-fermionique-dans-les-systemes-quantiques-a-plusieurs-corps-piotr-sierant-lpt-seminar-9-12-2025-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
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