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:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20230326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20231029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20230530T140000
DTEND;TZID=Europe/Paris:20230530T153000
DTSTAMP:20260423T043856
CREATED:20230519T072206Z
LAST-MODIFIED:20230522T093141Z
UID:8969-1685455200-1685460600@fermi.univ-tlse3.fr
SUMMARY:Entanglement and separability of Rokhsar-Kivelson and resonating valence-bond states . - (Gilles Parez / LPT / Seminar). - 30/05/2023\, 14H
DESCRIPTION:Gilles Parez (Université de Montréal) \nSeminar LPT\, 30 mai 2023\, 14H\, 3R1\, seminar room\, 3rd floor \nRésumé : \n\nEntanglement 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 problem\, which has led to important insights in the context of quantum many-body systems. In this talk\, I will discuss entanglement and separability of dimer Rokhsar-Kivelson (RK) states and resonating valence-bond (RVB) states. For dimer RK states on general tilable graphs\, we prove the exact separability of the reduced density matrix of two or more disconnected subsystems\, implying the absence of entanglement between the subsystems. For RVB states\, we show separability for disconnected systems up to exponentially small terms in the distance d between the subsystems. We argue that separability does hold in the scaling limit\, even for arbitrarily small ratio d/L\, where L is the characteristic size of the subsystems. Our results hold irrespective of the underlying graph (which include square and triangular lattices)\, and hence suggest that separability (up to exponentially small terms) between disjoint regions is a universal feature of RVB states. In the case of adjacent subsystems for the RK states\, we derive exact results for the logarithmic negativity in terms of partition functions of the underlying statistical model\, and recover the known result for the Rényi-1/2 entropy in the limit of complementary subsystems. \nBased on joint work with Clément Berthier and William Witczak-Krempa\, arXiv : 2212.11740. \n\n 
URL:https://fermi.univ-tlse3.fr/event/entanglement-and-separability-of-rokhsar-kivelson-and-resonating-valence-bond-states-gilles-parez-lpt-seminar-30-05-2023-14h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
END:VEVENT
END:VCALENDAR