Response functions and superfluid density in a weakly interacting Bose gas with nonquadratic dispersion

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Abstract

Motivated by the experimental search for Bose condensation of quasiparticles in semiconductors, the response functions of a weakly interacting Bose gas, with isotropic but nonquadratic dispersion, are considered. Nonquadratic dispersion modifies the definition of particle current, and leads to modified sum rules for the current-current response function. The effect of these modifications on the Berezhinski-Kosterlitz-Thouless transition is discussed.

Original languageEnglish
Pages (from-to)155325
Number of pages5
JournalPhysical Review. B, Condensed matter and materials physics
Volume74
Issue number15
DOIs
Publication statusPublished - Oct 2006

Keywords

  • SEMICONDUCTOR MICROCAVITY
  • EINSTEIN CONDENSATION
  • POLARITON LASER
  • SYSTEMS

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