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:0-1112@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20260410T140000
DTEND;TZID=Europe/Paris:20260410T153000
DTSTAMP:20260402T105131Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/informal-quantum-
 seminar-alvise-bastianello-universite-dauphine/
SUMMARY:Informal Quantum Seminar: Alvise Bastianello (Universite Dauphine) 
 - Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 10
  Avr 26 14:00
DESCRIPTION:New states in one-dimensional ultracold bosons with varying int
 eractions\nAlvise Bastianello (Université Dauphine)\n&nbsp\;\nQuantum sta
 tistics governs ultracold matter: bosons can condense and are generally un
 stable when interactions are attractive. In contrast\, fermions form Fermi
  seas and avoid collapse when attractive via the Pauli principle exclusion
 s. In one dimension\, interactions and statistics intertwine\, blurring th
 is distinction\, and approximate integrability stabilizes novel phases.\nI
 n this talk\, I present recent experimental and theoretical results on ult
 racold bosons driven out of equilibrium by time-dependent interactions. In
  the first experiment\, we realized  Fermi sea-like states with fractiona
 l occupancy\, which we dub fractional Fermi seas (FFS). These FFS showcase
  prominent Friedel oscillations in the one-particle correlator detected in
  the experiment\, and bear clear signatures of criticality beyond the Lutt
 inger Liquid paradigm.\nIn the second experiment\, we gently swipe interac
 tions from the repulsive to the attractive regime\, promoting the formatio
 n of a gas of stable bound states called Bethe strings\, whose binding ene
 rgy leaves a clear signature in the experimentally observed momentum distr
 ibution.\nExperimental data are in quantitative agreement with theoretical
  predictions from Generalized Hydrodynamics\, which provide a comprehensiv
 e characterization of these exotic nonequilibrium states.
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:DAYLIGHT
DTSTART:20260329T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
END:DAYLIGHT
END:VTIMEZONE
END:VCALENDAR