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DTSTART;TZID=Europe/Paris:20250203T110000
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CREATED:20250131T090833Z
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UID:11357-1738580400-1738585800@fermi.univ-tlse3.fr
SUMMARY:Quantum simulation and learning of (nearly) free-fermionic states. - (Yaroslav Herasymenko / LPT / Seminar). - 3/02/2025\, 11H
DESCRIPTION:Séminaire LPT \nYaroslav Herasymenko (QuTech [TU Delft]\, QuSoft [CWI\, Amsterdam]) \nSeminar LPT\, 3/02/2025\, 11H\, 3R4\, salle de conférence \nSummary :\nIn this presentation\, I will talk about two problems in quantum computation: (1) how to efficiently simulate a many-body system? And (2) given a simulated quantum state\, how to efficiently learn this state from the measurements? In particular\, I will focus on the systems composed of fermionic particles\, and the settings which are close to non-interacting. Simulations of non-interacting fermions can often be done efficiently on a classical computer. However\, for large systems they become prohibitive. To meet this challenge\, we provide a quantum algorithm to simulate free-fermion evolutions and thermal states. In particular\, I will talk about the speedup that a quantum computer can offer in solving this problem\, ranging from a substantial algebraic up to exponential\, depending on the system. Switching gears to the quantum learning problem\, I will explain how to efficiently learn states which come from quantum circuits dominated by free-fermionic gates. Our learning algorithm is essentially optimal and also applicable to impurity model evolutions\, as will be briefly discussed. I will close by describing some open directions in quantum computing for fermionic systems\, such as the accelerated simulation of so-called ’sign-free’ interacting systems\, and learning of unitaries rather than the states. \nThe talk will be based on the recent works arXiv:2409.04550 (under review) and arXiv:2402.18665 (PRX Quantum\, to appear).
URL:https://fermi.univ-tlse3.fr/event/tba-yaroslav-herasymenko-lpt-seminar-3-02-2025-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
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