BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:Europe/Vienna
BEGIN:DAYLIGHT
DTSTART:20230326T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:CEST
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:20231029T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:CET
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20240806T011326Z
UID:1685628900@ist.ac.at
DTSTART:20230601T161500
DTEND:20230601T171500
DESCRIPTION:Speaker: Martin Ravn\nhosted by Robert Seiringer\nAbstract: In
this talk we consider the correlation energy of a Fermi gas on a torus as
the particle number N goes to infinity\,with the interaction potential sca
led by a factor proportional to N^{-1/3}.In the second-quantized picture\,
the Hamiltonian of such a system can be written in the form of a quadrati
c Hamiltonian with respect to certain "quasi-bosonic" operators. By applyi
ng the theory of bosonic Bogolubov transformations\, this Hamiltonian can
be approximately diagonalized to yield a "bosonic contribution" to the cor
relation energy. For highly singular potentials\, such as the Coulomb pote
ntial\, the correlation energy also consists of an "exchange contribution"
due to the underlying fermionic nature of the system. We will see that th
is is nonetheless automatically captured by the same approach\, provided o
ne keeps careful track of the fermionic correction terms.Based on joint wo
rk with Christian Hainzl and Phan Thành Nam.
LOCATION:Heinzel Seminar Room (I21.EG.101)\, Office Building West\, ISTA\,
ISTA
ORGANIZER:birgit.oosthuizen-noczil@ist.ac.at
SUMMARY:Martin Ravn: The Correlation Energy of a Fermi Gas in the Mean-Fiel
d Regime
URL:https://talks-calendar.ista.ac.at/events/4170
END:VEVENT
END:VCALENDAR