Dear Friends,
On Thursday, November 1, there will be an ITAMP topical lunch discussion.
Tea Room (P-226) @ CfA (60 Garden Street)
Time: 12:00-1:30
As always pizza will be served.
Speaker: Prof. Dörte Blume
Title: S-wave interacting fermions under anisotropic harmonic
confinement: Dimensional crossover of energetics and virial
coefficients
Abstract:
Few-body physics has played a prominent role in atomic, molecular,
chemical and nuclear physics since the early days of quantum
mechanics. It is now possible -- thanks to tremendous progress in
cooling, trapping, and manipulating ultracold samples -- to
experimentally study few-body phenomena in trapped atomic and
molecular systems with unprecedented control. This talk summarizes
recent studies of few-body phenomena in trapped fermionic gases. We
present accurate solutions of the Schrodinger equation for three
equal-mass fermions in two different spin states with zero-range
s-wave interactions and discuss the transition from
quasi-one-dimensional to strictly one-dimensional and
quasi-two-dimensional to strictly two-dimensional geometries. We
determine and interpret the eigenenergies of the system as a function
of the trap geometry and the strength of the s-wave interactions. The
eigenenergies are used to investigate the dependence of the second-
and third-order virial coefficients, which play an important role in
the virial expansion of the thermodynamic potential, on the geometry
of the trap. We show that the second- and third-order virial
coefficients for anisotropic confinement geometries are, for
experimentally relevant temperatures, very well approximated by those
for the spherically symmetric confinement for all s-wave scattering
lengths.
[1] S.E. Gharashi, K.M. Daily, and D. Blume, Phys. Rev. A 86, 042702 (2012)
Looking forward to seeing you there,
Misha Lemeshko
--
Dr. Mikhail Lemeshko
Institute for Theoretical Atomic, Molecular, and Optical Physics (ITAMP)
Harvard-Smithsonian Center for Astrophysics MS-14
60 Garden St.
Cambridge, MA 02138
U.S.A.
mlemeshko(a)cfa.harvard.edu
http://sites.google.com/site/mishalemeshko/
Tel. +1 (617) 496-7610
Fax +1 (617) 496-7668