Collective motion of polarized dipolar Fermi gases in the hydrodynamic regime

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.021606· OSTI ID:21408174

Lima, Aristeu R. P. ^[1]; Pelster, Axel ^[1]

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1. Institut fuer Theoretische Physik, Freie Universitaet Berlin, Arnimallee 14, D-14195 Berlin (Germany)

Recently, a seminal stimulated Raman adiabatic passage (STIRAP) experiment allowed the creation of {sup 40}K{sup 87}Rb molecules in the rovibrational ground state [K.-K. Ni et al., Science 322, 231 (2008)]. To describe such a polarized dipolar Fermi gas in the hydrodynamic regime, we work out a variational time-dependent Hartree-Fock approach. With this we calculate dynamical properties of such a system, for instance, the frequencies of the low-lying excitations and the time-of-flight expansion. We find that the dipole-dipole interaction induces anisotropic breathing oscillations in momentum space. In addition, after release from the trap, the momentum distribution becomes asymptotically isotropic, while the particle density becomes anisotropic.

• OSTI ID: 21408174
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 81; 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
APPROXIMATIONS
CALCULATION METHODS
DIPOLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMI GAS
GROUND STATES
HARTREE-FOCK METHOD
INTERACTIONS
MOLECULES
MULTIPOLES
OSCILLATIONS
TIME DEPENDENCE
TIME-OF-FLIGHT METHOD
VARIATIONAL METHODS