Random potential and modulation of the order parameter of exciton bose-einstein condensate in a ring

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Abstract

We have studied theoretically the Bose-Einstein condensation (BEC) of two-dimensional excitons in a ring with a small random variation of the effective exciton potential along the circumference. We derive a nonlinear Gross-Pitaevskii equation (GPE) for such a condensate, which is valid even in the presence of a weak magnetic field. For several types of random potentials, our numerical solution of the ground state of the GPE displays a necklace-like structure. This is a consequence of the interplay between the random potential and a strong nonlinear repulsive term in the GPE.

Original languageEnglish
Pages (from-to)388-394
Number of pages7
JournalLaser Physics
Volume15
Issue number2
Publication statusPublished - 2005 Feb

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Industrial and Manufacturing Engineering

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