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

Hui Hu, Gao Xianlong, and Xia-Ji Liu
Phys. Rev. A 90, 013622 – Published 21 July 2014

Abstract

We theoretically investigate collective modes of a one-dimensional (1D) interacting Bose gas in a harmonic tras at finite temperatures, by using a variational approach and the 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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  • Received 6 February 2014

DOI:https://doi.org/10.1103/PhysRevA.90.013622

©2014 American Physical Society

Authors & Affiliations

Hui Hu1, Gao Xianlong2, and Xia-Ji Liu1,*

  • 1Centre for Quantum and Optical Science, Swinburne University of Technology, Melbourne 3122, Australia
  • 2Department of Physics, Zhejiang Normal University, Jinhua 321004, China

  • *xiajiliu@swin.edu.au

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Vol. 90, Iss. 1 — July 2014

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