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Metastable state and macroscopic quantum tunneling of binary mixtures

  • Mesoscopic and Nanoscale Systems
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Abstract

We provide a mixing model to explore the metastable state and the macroscopic quantum tunneling (MQT) of binary mixtures. For \(g_{12} >\sqrt {g_1 g_2}\), we first observe the two condensates form the symmetry-breaking state (SBS) and then suddenly transfer to the symmetry-preserving state (SPS) through the MQT. The SBS is shown to be the metastable state in our system. We find the MQT does not spontaneously arise. The inducement mechanism is the damping but not the excitations. The damping mechanism can also control the lifetime and the tunneling decay rate of the SBS. Finally, we further present the origin of these phenomena by examining the energy of the system.

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Authors and Affiliations

  1. Department of Physics, Xiangtan University, Xiangtan, 411105, Hunan, P.R. China

    C. F. Liu & Y. Tang

  2. Institute of Modern Physics, Xiangtan University, Xiangtan, 411105, Hunan, P.R. China

    Y. Tang

Authors
  1. C. F. Liu
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  2. Y. Tang
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Correspondence to Y. Tang.

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Liu, C., Tang, Y. Metastable state and macroscopic quantum tunneling of binary mixtures. Eur. Phys. J. B 70, 193–199 (2009). https://doi.org/10.1140/epjb/e2009-00216-2

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  • DOI: https://doi.org/10.1140/epjb/e2009-00216-2

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