BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//6.4.7.2//EN
TZID:Europe/Paris
X-WR-TIMEZONE:Europe/Paris
BEGIN:VEVENT
UID:0-760@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20210209T110000
DTEND;TZID=Europe/Paris:20210209T120000
DTSTAMP:20210128T221038Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-alberto-biella-lptms/
SUMMARY:Séminaire du LPTMS : Alberto Biella (LPTMS) - LPTMS (100% online s
 eminar) - 9 Fév 21 11:00
DESCRIPTION:Measurement-induced entanglement phase transitions and the Quan
 tum Zeno Effect\nAlberto Biella (LPTMS)\n\nOnline seminar --- ZOOM Meeting
  ID: 918 3216 1661 -- Password: Ask L. Mazza or D. Petrov --\n\nIt is well
  known that by repeatedly measuring a quantum system it is possible to com
 pletely freeze its dynamics into a well defined state\, a signature of the
  Quantum Zeno Effect. In my talk I will discuss how\, for a many-body syst
 em evolving under competing unitary evolution and variable-strength measur
 ements\, the onset of the Zeno effect takes the form of a sharp phase tran
 sition [1].  Using the Quantum Ising chain with continuous monitoring of t
 he transverse magnetization as paradigmatic example\, we show that for wea
 k measurements the entanglement produced by the unitary dynamics remains p
 rotected\, while only above a certain threshold the system is sharply brou
 ght into an uncorrelated Zeno subspace. Furthermore\, we show that this tr
 ansition is invisible to the average dynamics\, but encoded in the rare fl
 uctuations of the stochastic measurement process. Finally we trace an intr
 iguing connection between the onset of the Zeno effect and the subradiance
  transition of the associated non-Hermitian Hamiltonian.\n\n[1] AB\, M. Sc
 hirò\, arXiv:2011.11620
CATEGORIES:seminars
LOCATION:LPTMS (100% online seminar)\, LPTMS - Bâtiment Pascal n° 530 rue
  André Rivière - Université Paris-Saclay\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=LPTMS - Bâtiment Pascal n
 ° 530 rue André Rivière - Université Paris-Saclay\, Orsay\, 91405\, Fr
 ance;X-APPLE-RADIUS=100;X-TITLE=LPTMS (100% online seminar):geo:0,0
END:VEVENT
BEGIN:VTIMEZONE
TZID:Europe/Paris
X-LIC-LOCATION:Europe/Paris
BEGIN:STANDARD
DTSTART:20201025T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
END:STANDARD
END:VTIMEZONE
END:VCALENDAR