4.5 Article

On a thermal cloud-Bose-Einstein condensate coupling system

期刊

EUROPEAN PHYSICAL JOURNAL PLUS
卷 136, 期 5, 页码 -

出版社

SPRINGER HEIDELBERG
DOI: 10.1140/epjp/s13360-021-01510-z

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资金

  1. NSF [DMS-1814149, DMS-1854453]
  2. NSF CAREER [DMS-2044626]
  3. SMU URC Grant 2020
  4. Dedman College of Humanities and Sciences Linking Fellowship
  5. Alexander von Humboldt Fellowship

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A new model describing the behavior of a Bose gas at finite temperatures is derived, incorporating a Gross-Pitaevskii equation for the condensate wave function and a quantum Boltzmann equation for excitations. The model is applicable over a wide range of temperatures and converges to the standard ZNG model when approaching the Bose-Einstein condensate transition temperature.
Starting with an N body system describing a Bose gas at finite temperatures, we derive a new model that contains a Gross-Pitaevskii equation of motion for the condensate wave function and a quantum Boltzmann equation for the excitations. The model is valid for a wide range of finite temperatures and approaches the standard ZNG model when the temperature of the system T is close to the Bose-Einstein condensate (BEC) transition temperature T-c.

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