Dynamical properties of a trapped dipolar Fermi gas at finite temperature

Journal Article · Sun May 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053628· OSTI ID:21546841

Zhang, J -N; Qiu, R -Z; Yi, S ^[1]; He, L ^[2]

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1. Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China)
2. Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet, D-60438 Frankfurt/Main (Germany)

We investigate the dynamical properties of a trapped finite-temperature normal Fermi gas with dipole-dipole interaction. For the free-expansion dynamics, we show that the expanded gas always becomes stretched along the direction of the dipole moment. In addition, we present the temperature and interaction dependences of the asymptotic aspect ratio. We further study the collapse dynamics of the system by suddenly increasing the dipolar interaction strength. We show that, in contrast to the anisotropic collapse of a dipolar Bose-Einstein condensate, a dipolar Fermi gas always collapses isotropically when the system becomes globally unstable. We also explore the interaction and temperature dependences for the frequencies of the low-lying collective excitations.

• OSTI ID: 21546841
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ANISOTROPY
ASPECT RATIO
ASYMPTOTIC SOLUTIONS
BOSE-EINSTEIN CONDENSATION
COLLECTIVE EXCITATIONS
DIMENSIONLESS NUMBERS
DIPOLE MOMENTS
DIPOLES
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPANSION
FERMI GAS
INTERACTIONS
MATHEMATICAL SOLUTIONS
MULTIPOLES
TEMPERATURE DEPENDENCE
TRAPPING