Role of interactions in spin-polarized atomic Fermi gases at unitarity
Role of interactions in spin-polarized atomic Fermi gases at unitarity
We study the zero temperature properties of a trapped polarized Fermi gas at unitarity by assuming phase separation between an unpolarized superfluid and a polarized normal phase. The effects of the interaction are accounted for using the formalism of quasiparticles to build up the equation of state of the normal phase with the Monte Carlo results for the relevant parameters. Our predictions for the Chandrasekhar-Clogston limit of critical polarization and for the density profiles, including the density jump at the interface, are confirmed with excellent accuracy by the recent experimental results at MIT. The role of interaction on the radial width of the minority component, on the gap of spectral functions, and on the spin oscillations in the normal phase is also discussed. Our analysis points out the Fermi liquid nature of these strongly interacting spin-polarized configurations.
023633-[6pp]
Recati, A.
4f2a6759-f4f7-4bc7-819e-027ff21a56a5
Lobo, C.
cde7843a-c00b-4242-a8cd-1abb2dfe0703
Stringari, S.
76042105-4119-4bbd-9680-1b2314e497d9
28 August 2008
Recati, A.
4f2a6759-f4f7-4bc7-819e-027ff21a56a5
Lobo, C.
cde7843a-c00b-4242-a8cd-1abb2dfe0703
Stringari, S.
76042105-4119-4bbd-9680-1b2314e497d9
Recati, A., Lobo, C. and Stringari, S.
(2008)
Role of interactions in spin-polarized atomic Fermi gases at unitarity.
Physical Review A, 78 (2), .
(doi:10.1103/PhysRevA.78.023633).
Abstract
We study the zero temperature properties of a trapped polarized Fermi gas at unitarity by assuming phase separation between an unpolarized superfluid and a polarized normal phase. The effects of the interaction are accounted for using the formalism of quasiparticles to build up the equation of state of the normal phase with the Monte Carlo results for the relevant parameters. Our predictions for the Chandrasekhar-Clogston limit of critical polarization and for the density profiles, including the density jump at the interface, are confirmed with excellent accuracy by the recent experimental results at MIT. The role of interaction on the radial width of the minority component, on the gap of spectral functions, and on the spin oscillations in the normal phase is also discussed. Our analysis points out the Fermi liquid nature of these strongly interacting spin-polarized configurations.
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Published date: 28 August 2008
Organisations:
Mathematics
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Local EPrints ID: 156295
URI: http://eprints.soton.ac.uk/id/eprint/156295
ISSN: 1050-2947
PURE UUID: 635d4db0-2aa1-4401-bb2f-5ff854e05f97
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Date deposited: 01 Jun 2010 08:58
Last modified: 14 Mar 2024 02:54
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Author:
A. Recati
Author:
S. Stringari
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