Interaction Effects on Number Fluctuations in a Bose-Einstein Condensate of Light

Abstract

We investigate the effect of interactions on condensate-number fluctuations in Bose-Einstein condensates. For a contact interaction we variationally obtain the equilibrium probability distribution for the number of particles in the condensate. To facilitate comparison with experiment, we also calculate the zero-time delay autocorrelation function $g^{(2)}(0)$ for different strengths of the interaction. Finally, we focus on the case of a condensate of photons and discuss possible mechanisms for the interaction.

13 pages, version 3, 4 figures

References in corpus (2)

• Bose-Einstein condensation of photons in an optical microcavity
• Long-range correlations of density in a Bose-Einstein condensate expanding in a random potential

Cited by in corpus (8)

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• Variable Potentials for Thermalized Light and Coupled Condensates
• Bose-Einstein condensation of photons with nonlocal nonlinearity in a dye-doped graded-index microcavity
• Phase-space views into dye-microcavity thermalised and condensed photons
• Polarization dynamics in a photon BEC
• Continuum of classical-field ensembles from canonical to grand canonical and the onset of their equivalence
• Interferometry with independently prepared Bose-Einstein condensates
• The Effective Interaction Strength in a Bose-Einstein Condensate of Photons in a Dye-Filled Microcavity