Normal state of a polarized Fermi gas at unitarity
Normal state of a polarized Fermi gas at unitarity
We study the Fermi gas at unitarity and at T=0 by assuming that, at high polarizations, it is a normal Fermi liquid composed of weakly interacting quasiparticles associated with the minority spin atoms. With a quantum Monte Carlo approach we calculate their effective mass and binding energy, as well as the full equation of state of the normal phase as a function of the concentration x=n?/n? of minority atoms. We predict a first order phase transition from normal to superfluid at xc=0.44 corresponding, in the presence of harmonic trapping, to a critical polarization Pc=(N?-N?)/(N?+N?)=77%. We calculate the radii and the density profiles in the trap and predict that the frequency of the spin dipole mode will be increased by a factor of 1.23 due to interactions
200403 -[4pp]
Lobo, C.
cde7843a-c00b-4242-a8cd-1abb2dfe0703
Recati, A.
4f2a6759-f4f7-4bc7-819e-027ff21a56a5
Giorgini, S.
b0a1b36d-128c-4d7b-8794-1d247f539647
Stringari, S.
76042105-4119-4bbd-9680-1b2314e497d9
November 2006
Lobo, C.
cde7843a-c00b-4242-a8cd-1abb2dfe0703
Recati, A.
4f2a6759-f4f7-4bc7-819e-027ff21a56a5
Giorgini, S.
b0a1b36d-128c-4d7b-8794-1d247f539647
Stringari, S.
76042105-4119-4bbd-9680-1b2314e497d9
Lobo, C., Recati, A., Giorgini, S. and Stringari, S.
(2006)
Normal state of a polarized Fermi gas at unitarity.
Physical Review Letters, 97 (20), .
(doi:10.1103/PhysRevLett.97.200403).
Abstract
We study the Fermi gas at unitarity and at T=0 by assuming that, at high polarizations, it is a normal Fermi liquid composed of weakly interacting quasiparticles associated with the minority spin atoms. With a quantum Monte Carlo approach we calculate their effective mass and binding energy, as well as the full equation of state of the normal phase as a function of the concentration x=n?/n? of minority atoms. We predict a first order phase transition from normal to superfluid at xc=0.44 corresponding, in the presence of harmonic trapping, to a critical polarization Pc=(N?-N?)/(N?+N?)=77%. We calculate the radii and the density profiles in the trap and predict that the frequency of the spin dipole mode will be increased by a factor of 1.23 due to interactions
Text
PhysRevLett.97.200403.pdf
- Version of Record
More information
Published date: November 2006
Organisations:
Applied Mathematics
Identifiers
Local EPrints ID: 205901
URI: http://eprints.soton.ac.uk/id/eprint/205901
PURE UUID: 270b85c5-5b18-411d-b3e7-3b3dc4e0416a
Catalogue record
Date deposited: 15 Dec 2011 09:10
Last modified: 15 Mar 2024 03:32
Export record
Altmetrics
Contributors
Author:
A. Recati
Author:
S. Giorgini
Author:
S. Stringari
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
