Collective excitations of Bose-Einstein-condensed gases at finite temperatures

R. J. Dodd; Mark Edwards; Charles W. Clark; K. Burnett

doi:10.1103/PhysRevA.57.R32

Collective excitations of Bose-Einstein-condensed gases at finite temperatures

R. J. Dodd, Mark Edwards, Charles W. Clark, K. Burnett

Biochemistry, Chemistry & Physics

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140 Scopus citations

Abstract

We have applied the Popov version of the Hartree-Fock-Bogoliubov (HFB) approximation to calculate the finite-temperature excitation spectrum of a Bose-Einstein condensate (BEC) of [Formula Presented] atoms. For lower values of the temperature, we find excellent agreement with recently published experimental data for the JILA time-averaged orbiting potential trap. In contrast to recent comparison of the results of HFB-Popov theory with experimental condensate fractions and specific heats, there is disagreement of the theoretical and recent experimental results near the BEC phase transition temperature.

Original language	English
Pages (from-to)	R32-R35
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	57
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevA.57.R32
State	Published - 1998

Scopus Subject Areas

Atomic and Molecular Physics, and Optics

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title = "Collective excitations of Bose-Einstein-condensed gases at finite temperatures",

abstract = "We have applied the Popov version of the Hartree-Fock-Bogoliubov (HFB) approximation to calculate the finite-temperature excitation spectrum of a Bose-Einstein condensate (BEC) of [Formula Presented] atoms. For lower values of the temperature, we find excellent agreement with recently published experimental data for the JILA time-averaged orbiting potential trap. In contrast to recent comparison of the results of HFB-Popov theory with experimental condensate fractions and specific heats, there is disagreement of the theoretical and recent experimental results near the BEC phase transition temperature.",

author = "Dodd, \{R. J.\} and Mark Edwards and Clark, \{Charles W.\} and K. Burnett",

year = "1998",

doi = "10.1103/PhysRevA.57.R32",

language = "English",

volume = "57",

pages = "R32--R35",

journal = "Physical Review A - Atomic, Molecular, and Optical Physics",

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T1 - Collective excitations of Bose-Einstein-condensed gases at finite temperatures

AU - Dodd, R. J.

AU - Edwards, Mark

AU - Clark, Charles W.

AU - Burnett, K.

PY - 1998

Y1 - 1998

N2 - We have applied the Popov version of the Hartree-Fock-Bogoliubov (HFB) approximation to calculate the finite-temperature excitation spectrum of a Bose-Einstein condensate (BEC) of [Formula Presented] atoms. For lower values of the temperature, we find excellent agreement with recently published experimental data for the JILA time-averaged orbiting potential trap. In contrast to recent comparison of the results of HFB-Popov theory with experimental condensate fractions and specific heats, there is disagreement of the theoretical and recent experimental results near the BEC phase transition temperature.

AB - We have applied the Popov version of the Hartree-Fock-Bogoliubov (HFB) approximation to calculate the finite-temperature excitation spectrum of a Bose-Einstein condensate (BEC) of [Formula Presented] atoms. For lower values of the temperature, we find excellent agreement with recently published experimental data for the JILA time-averaged orbiting potential trap. In contrast to recent comparison of the results of HFB-Popov theory with experimental condensate fractions and specific heats, there is disagreement of the theoretical and recent experimental results near the BEC phase transition temperature.

UR - https://www.scopus.com/pages/publications/0000393590

U2 - 10.1103/PhysRevA.57.R32

DO - 10.1103/PhysRevA.57.R32

M3 - Article

AN - SCOPUS:0000393590

SN - 1050-2947

VL - 57

SP - R32-R35

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

IS - 1

ER -

Collective excitations of Bose-Einstein-condensed gases at finite temperatures

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