Interferencing in coupled Bose-Einstein condensates

T Michoel, A Verbeure

Research output: Contribution to journalArticlepeer-review

Abstract

We consider an exactly soluble model of two Bose Einstein condensates with a Josephson-type of coupling. Its equilibrium states are explicitly found showing condensation and spontaneously broken gauge symmetry. It is proved that the total number and total phase fluctuation operators, as well as the relative number and relative current fluctuations operators form both a quantum canonical pair. The exact relation between the relative current and phase fluctuation operators is established. Also the dynamics of these operators is solved showing the collapse and revival phenomenon.

Original languageEnglish
Pages (from-to)1383-1405
Number of pages23
JournalJournal of Statistical Physics
Volume102
Issue number5-6
DOIs
Publication statusPublished - Mar 2001

Keywords

  • Bose-Einstein condensation
  • fluctuations of a Josephson-type current
  • phase fluctuations
  • collapse and revivals
  • interferences in equilibrium

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