Analytical approach to relaxation dynamics of condensed Bose gases

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Annals of Physics (New York)

DOI:https://doi.org/10.1016/j.aop.2010.11.001· OSTI ID:21579881

Escobedo, Miguel; Pezzotti, Federica ^[1]; Valle, Manuel ^[2]

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1. Departamento de Matematicas, Universidad del Pais Vasco, Apartado 644, E-48080 Bilbao (Spain)
2. Departamento de Fisica Teorica, Universidad del Pais Vasco, Apartado 644, E-48080 Bilbao (Spain)

Research Highlights: > Time evolution of perturbations from equilibrium in a condensed Bose gas is studied. > Just below the critical temperature the perturbations vanish algebraically. > Anisotropic perturbations are unstable. > At very low temperature perturbations decay exponentially. - Abstract: The temporal evolution of a perturbation of the equilibrium distribution of a condensed Bose gas is investigated using the kinetic equation which describes collision between condensate and noncondensate atoms. The dynamics is studied in the low momentum limit where an analytical treatment is feasible. Explicit results are given for the behavior at large times in different temperature regimes.

• OSTI ID: 21579881
• Journal Information: Annals of Physics (New York), Vol. 326, Issue 4; Other Information: DOI: 10.1016/j.aop.2010.11.001; PII: S0003-4916(10)00190-9; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0003-4916
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
ATOMS
BOSE-EINSTEIN GAS
COLLISIONS
CONDENSATES
CRITICAL TEMPERATURE
DECAY
DISTRIBUTION
DISTURBANCES
EQUILIBRIUM
KINETIC EQUATIONS
PERTURBATION THEORY
RELAXATION
TEMPERATURE RANGE 0013-0065 K
TURBULENCE
EQUATIONS
PHYSICAL PROPERTIES
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE