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:0-1096@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20260317T110000
DTEND;TZID=Europe/Paris:20260317T120000
DTSTAMP:20260309T151121Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-jerome-dubailuniversite-de-strasbourg-cnrs/
SUMMARY:LPTMS Seminar: Jérôme Dubail (CESQ &amp\; ISIS\, Strasbourg) - Sa
 lle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 17 Mar
  26 11:00
DESCRIPTION:Limit shapes in measured many-particle quantum states in the la
 rge deviation regime\nJérôme Dubail (CESQ &amp\; ISIS\, Strasbourg)\n&nb
 sp\;\n\nMotivated by the possibility of imaging density profiles of ultrac
 old quantum gases with high resolution\, e.g. at the single-atom level wit
 h quantum gas microscopes\, we investigate the effect of measuring the num
 ber of particles in an extended subsystem\, and of post-selecting those ra
 re measurements outcomes where the subsystem particle number differs signi
 ficantly from its mean value. In a gas of non-interacting bosons\, the eff
 ect of that protocol is clear: the measured state is a tensor product of t
 he equilibrium state at the measured density inside the subsystem\, and at
  the complementary density (so that the total number of particles in the f
 ull system is conserved) in its complement. The natural expectation about 
 interacting systems would then be that this picture would be mildly modifi
 ed only in a small region around the interface between the subsystem and i
 ts complement. However\, this expectation turns out to be completely wrong
 \, and the density profiles are drastically different even in simple syste
 ms like the ground state of non-interacting fermions. I will discuss a few
  examples combining analytical techniques and results from quantum Monte C
 arlo\, and argue that the emergence of limit shapes in the density profile
  of such measured systems is a generic phenomenon. I will also discuss cor
 relations in such measured quantum states\, and their relation with 'symme
 try-resolved entanglement entropy' and argue that 'entanglement equipartit
 ion'\, generically expected in the regime of small deviations\, breaks dow
 n and is replaced by an area law in the large deviation regime.
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
END:VEVENT
BEGIN:VTIMEZONE
TZID:Europe/Paris
X-LIC-LOCATION:Europe/Paris
BEGIN:STANDARD
DTSTART:20251026T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
END:STANDARD
END:VTIMEZONE
END:VCALENDAR