BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/Vienna
BEGIN:DAYLIGHT
DTSTART:20190331T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:CEST
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:20191027T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:CET
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20260406T121850Z
UID:5c5c38a48b73b840562104@ist.ac.at
DTSTART:20190827T110000
DTEND:20190827T120000
DESCRIPTION:Speaker: Sergey Andreev\nhosted by Mikhail Lemeshko\nAbstract: 
 The field of quantum gases owns its rapid development to the outstanding s
 ynergy of theory and experiment. A dilute interacting gas admits analytica
 l perturbative treatment. On the experimental side\, the crucial tool has 
 been the technique of Feshbach resonance\, which has allowed to test the p
 redictions of the theory in controllable fashion.Excitons and exciton-pola
 ritons addressed in this talk are elementary excitations in direct bandgap
  semiconductor heterostructures. In typical conditions these excitations f
 orm a dilute Bose gas\, which (with some complementary effort) can be cool
 ed and Bose-Einstein condensed. Important difference of the excitonic cond
 ensates from their atomic counterpart is their purely 2D character. Due to
  the properties of 2D kinematics\, two-body interactions of ultra-cold exc
 itons are generically weak. We shall discuss what could be an analog of th
 e Feshbach resonance in this case and present possible evidence of the phe
 nomenon in recent experiments. The associated many-body phases suggest int
 riguing applications\, which can be realized on the basis of the existing 
 semiconductor technology.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Sergey Andreev: Interacting gases of ultra-cold excitons and excito
 n-polaritons in 2D semiconductors
URL:https://talks-calendar.ista.ac.at/events/2045
END:VEVENT
END:VCALENDAR