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:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250203T110000
DTEND;TZID=Europe/Paris:20250203T123000
DTSTAMP:20260413T133559
CREATED:20250131T090833Z
LAST-MODIFIED:20250131T094715Z
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250204T140000
DTEND;TZID=Europe/Paris:20250204T153000
DTSTAMP:20260413T133559
CREATED:20250131T053708Z
LAST-MODIFIED:20250131T094635Z
UID:11215-1738677600-1738683000@fermi.univ-tlse3.fr
SUMMARY:Pushing and pulling forces by actin : from microscopic to macroscopic models. - (Serge Dmitrieff / LPT / Seminar). - 4/02/2025\, 14H
DESCRIPTION:Séminaire LPT \nSerge Dmitrieff (Institut Jacques Monod) \nSeminar LPT\, 4/02/2025\, 14H\, 3R4\, salle de conférence \nSummary :\nActin networks generate large forces at the cellular scale. In this talk\, we will use a combination of simulations and analytical models to understand how macroscopic mechanics emerge from microscopic elements. In particular\, we will be interested in pushing forces by actin\, that can reach tens of nanoNewton of magnitude in-vivo. These forces emerge from the energy gained by filament polymerization and network mechanics. We show that the growth speed and pushing force of actin networks can be predicted by scaling arguments. We will also consider contractile actin-myosin networks\, such as cellular cortex. These networks are usually represented theoretically as active gels. Scaling arguments predict which forms of actin gels are good representation of actin networks – which we can verify in simulations. We can also predict how the contractile term depends on network architecture and myosin properties.
URL:https://fermi.univ-tlse3.fr/event/tba-serge-dmitrieff-lpt-seminar-4-02-2025-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250211T140000
DTEND;TZID=Europe/Paris:20250211T140000
DTSTAMP:20260413T133559
CREATED:20250206T080101Z
LAST-MODIFIED:20250207T092017Z
UID:11382-1739282400-1739282400@fermi.univ-tlse3.fr
SUMMARY:Unusual spin-orbit couplings in antiferromagnets. - (Revaz Ramazashvili / LPT / HDR). - 11/02/2025\, 14H
DESCRIPTION:Soutenance de HDR \nRevaz Ramazashvili\, LPT\, Salle de conférence\, Bat. 3R4 \nSummary: \nThis work is devoted to unusual spin-orbit couplings in antiferromagnets: those that fall outside the textbook classification by order of the expansion in the inverse speed of light 1/c. Contrary to the textbook Pauli spin-orbit coupling that arises only at second order in 1/c\, the unusual couplings of this work appear already at first and zeroth order in 1/c: \n– The Zeeman spin-orbit coupling\, arising from a substantial momentum dependence of the g-tensor\, is first-order in 1/c. \n– A smooth texture (non-uniform configuration) of the Néel order parameter generates a spin-orbit coupling that is of order zero in 1/c. \nBoth the Zeeman and the texture-induced spin-orbit coupling produce anomalous effects that are also a subject of this work. \n\n \n \n 
URL:https://fermi.univ-tlse3.fr/event/unusual-spin-orbit-couplings-in-antiferromagnets-revaz-ramazashvili-lpt-hdr-11-02-2025-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,HDR / Thesis,LPT
ATTACH;FMTTYPE=image/jpeg:https://fermi.univ-tlse3.fr/wp-content/uploads/2025/02/HDR_Ramazashvili.jpg
END:VEVENT
END:VCALENDAR