Collective modes of a one-dimensional trapped atomic Bose gas at finite temperatures

Collective modes of a one-dimensional trapped atomic Bose gas at finite temperatures

We theoretically investigate collective modes of a one-dimensional (1D) interacting Bose gas in harmonic traps at finite temperatures, by using a variational approach and local density approximation. We find that the temperature dependence of collective mode frequencies is notably different in the w...

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Veröffentlicht in:arXiv.org 2014-02
Hauptverfasser: Hu, Hui, Gao Xianlong, Xia-Ji, Liu
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Physics - Quantum Gases
Qualitative analysis
Rubidium
Temperature
Temperature dependence
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description We theoretically investigate collective modes of a one-dimensional (1D) interacting Bose gas in harmonic traps at finite temperatures, by using a variational approach and local density approximation. We find that the temperature dependence of collective mode frequencies is notably different in the weakly and strongly interacting regimes. Therefore, the experimental measurement of collective modes could provide a sensitive probe for different quantum phases of a 1D trapped Bose gas, realized by tuning the interatomic interaction strength and temperature. Our prediction on the temperature dependence of the breathing mode frequency is in good qualitative agreement with an earlier experimental measurement for a weakly interacting 1D Bose gas of rubidium-87 atoms in harmonic traps [Moritz et al., Phys. Rev. Lett. 91, 250402 (2003)].
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subjects Physics - Quantum Gases
Qualitative analysis
Rubidium
Temperature
Temperature dependence
title Collective modes of a one-dimensional trapped atomic Bose gas at finite temperatures
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