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Title: Sound velocity and multibranch Bogoliubov spectrum of an elongated Fermi superfluid in the BEC-BCS crossover

Abstract

We study properties of excited states of an elongated Fermi superfluid along the Bose-Einstein-condensate-BCS crossover including the unitarity limit. Analytic expressions for the sound velocity in an inhomogeneous as well as homogeneous Fermi superfluid along the crossover are obtained on the basis of the hydrodynamic theory. The complete excitation spectrum of axial quasiparticles with various discrete radial nodes is presented. We discuss the feasibility of measuring the sound velocity and the multibranch Bogoliubov spectrum experimentally.

Authors:
;  [1]
  1. Department of Physics, Okayama University, Okayama 700-8530 (Japan)
Publication Date:
OSTI Identifier:
20786755
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.73.013613; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; BCS THEORY; BOSE-EINSTEIN CONDENSATION; ENERGY SPECTRA; EXCITATION; EXCITED STATES; FERMIONS; HYDRODYNAMICS; QUASI PARTICLES; SOUND WAVES; SUPERFLUIDITY; UNITARITY; VELOCITY

Citation Formats

Ghosh, Tarun Kanti, and Machida, Kazushige. Sound velocity and multibranch Bogoliubov spectrum of an elongated Fermi superfluid in the BEC-BCS crossover. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.0.
Ghosh, Tarun Kanti, & Machida, Kazushige. Sound velocity and multibranch Bogoliubov spectrum of an elongated Fermi superfluid in the BEC-BCS crossover. United States. doi:10.1103/PHYSREVA.73.0.
Ghosh, Tarun Kanti, and Machida, Kazushige. Sun . "Sound velocity and multibranch Bogoliubov spectrum of an elongated Fermi superfluid in the BEC-BCS crossover". United States. doi:10.1103/PHYSREVA.73.0.
@article{osti_20786755,
title = {Sound velocity and multibranch Bogoliubov spectrum of an elongated Fermi superfluid in the BEC-BCS crossover},
author = {Ghosh, Tarun Kanti and Machida, Kazushige},
abstractNote = {We study properties of excited states of an elongated Fermi superfluid along the Bose-Einstein-condensate-BCS crossover including the unitarity limit. Analytic expressions for the sound velocity in an inhomogeneous as well as homogeneous Fermi superfluid along the crossover are obtained on the basis of the hydrodynamic theory. The complete excitation spectrum of axial quasiparticles with various discrete radial nodes is presented. We discuss the feasibility of measuring the sound velocity and the multibranch Bogoliubov spectrum experimentally.},
doi = {10.1103/PHYSREVA.73.0},
journal = {Physical Review. A},
number = 1,
volume = 73,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}