Dynamics of a classical gas including dissipative and mean-field effects

Journal Article · Wed Oct 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.043608· OSTI ID:20640371

Pedri, P ^[1]; Guery-Odelin, D ^[2]; Stringari, S ^[1]

---

1. Dipartimento di Fisica, Universita di Trento and BEC-INFM, I-38050 Povo (Italy)
2. Laboratoire Kastler Brossel, Ecole Normale Superieure, 24, Rue Lhomond, F-75231 Paris Cedex 05 (France)

By means of a scaling ansatz, we investigate an approximated solution of the Boltzmann-Vlasov equation for a classical gas. Within this framework, we derive the frequencies and the damping of the collective oscillations of a harmonically trapped gas and we investigate its expansion after releasing of the trap. The method is well suited to study the collisional effects taking place in the system and in particular to discuss the crossover between the hydrodynamic and the collisionless regimes. An explicit link between the relaxation times relevant for the damping of the collective oscillations and for the expansion is established.

• OSTI ID: 20640371
• Journal Information: Physical Review. A, Vol. 68, Issue 4; Other Information: DOI: 10.1103/PhysRevA.68.043608; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BOLTZMANN EQUATION
BOLTZMANN-VLASOV EQUATION
DAMPING
EXPANSION
FLUIDS
HYDRODYNAMICS
MATHEMATICAL SOLUTIONS
MEAN-FIELD THEORY
OSCILLATIONS
RELAXATION
TRAPPING
TRAPS