BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Instituto de Física Teórica - ECPv6.15.11//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Instituto de Física Teórica
X-ORIGINAL-URL:https://www.ift.uam-csic.es
X-WR-CALDESC:Events for Instituto de Física Teórica
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Madrid
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
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20270328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20271031T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260603T113000
DTEND;TZID=Europe/Madrid:20260603T123000
DTSTAMP:20260614T012943
CREATED:20260529T082527Z
LAST-MODIFIED:20260602T141630Z
UID:25123-1780486200-1780489800@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: 'Polynomial-time thermalization and Gibbs sampling from system-bath couplings'
DESCRIPTION:Title: ‘Polynomial-time thermalization and Gibbs sampling from system-bath couplings’\n\nSpeaker: Sam Slezak (ENS Lyon)\n\nVenue&Time: Gray Room 3 / 11:30\n\nAbstract: Many physical phenomena\, including thermalization in open quantum systems and quantum Gibbs sampling\, are modeled by Lindbladians approximating a system weakly coupled to a bath. Understanding the convergence speed of these Lindbladians to their steady states is crucial for bounding algorithmic runtimes and thermalization timescales. We study two such families of processes: one characterizing a repeated-interaction Gibbs sampling algorithm\, and another modeling open many-body quantum thermalization. We prove that both converge in polynomial time for several non-commuting systems\, including high-temperature local lattices\, weakly interacting fermions\, and 1D spin chains. These results demonstrate that simple dissipative quantum algorithms can prepare complex Gibbs states and that Lindblad dynamics accurately capture thermal relaxation. Our proofs rely on a novel technical result that extrapolates spectral gap lower bounds from quasi-local Lindbladians to the non-local generators governing these dynamics.
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-polynomial-time-thermalization-and-gibbs-sampling-from-system-bath-couplings/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260603T150000
DTEND;TZID=Europe/Madrid:20260603T163000
DTSTAMP:20260614T012943
CREATED:20260220T111829Z
LAST-MODIFIED:20260602T141751Z
UID:24426-1780498800-1780504200@www.ift.uam-csic.es
SUMMARY:IFT Colloquium: Matthew Headrick (Brandeis & IHES)
DESCRIPTION:Venue&Time: Blue Room / 15:00 \nCoffee will be served in the cafeteria at 16:15h \nTitle: ‘Black holes\, quantum entanglement\, and the geometry of spacetime’ \nSpeaker: Matthew Headrick (Brandeis & IHES) \nAbstract: Black holes are by far the most entropic objects in the universe\, and their enormous entropy directly connects the macroscopic world governed by general relativity to the Planck scale governed by quantum gravity. It turns out that they are just a piece of a much larger and richer story\, hinting that\, despite the notorious difficulty of quantizing gravity\, quantum mechanics and general relativity are actually two sides of the same coin. I’ll explain these connections\, and along the way try to answer the question: Is Newton’s constant really equal to 1?
URL:https://www.ift.uam-csic.es/event/colloquium-matthew-headrick-brandeis-ihes/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Colloquia,Scientific activities
END:VEVENT
END:VCALENDAR