Modulation of order parameter of exciton bose-einstein condensate in a ring

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3 Citations (Scopus)


We have studied theoretically the Bose-Einstein condensation (BEC) of two-dimensional excitons in a ring with a random variation of the effective exciton potential along the circumference. We derive a nonlinear Gross-Pitaevkii equation (GPE) for such a condensate, which is valid even in the presence of a weak magnetic field. For several types of the 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 of the GPE. We have investigated how the mean distance between modulation peaks depends on properties of the random potentials.

Original languageEnglish
Pages (from-to)3797-3802
Number of pages6
JournalInternational Journal of Modern Physics B
Issue number27-29
Publication statusPublished - 2004 Nov 30

Bibliographical note

Funding Information:
SREY thanks D. Chemla and L.V. Butov for useful conversations. This work is supported by Korea Research Foundation grant KRF-2003-015-C00223, and by grant No.(R01-1999-00018) from the interdisciplinary research program of the KOSEF, and by KOSEF R01-2001-00016.


  • Exciton Bose-Einstein condensate
  • Modulation of the order parameter
  • Random exciton potential

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics


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