Coexistence of photonic and atomic Bose-Einstein condensates in ideal atomic gases

Abstract

We have studied conditions of photon Bose-Einstein condensate formation that is in thermodynamic equilibrium with ideal gas of two-level Bose atoms below the degeneracy temperature. Equations describing thermodynamic equilibrium in the system were formulated; critical temperatures and densities of photonic and atomic gas subsystems were obtained analytically. Coexistence conditions of these photonic and atomic Bose-Einstein condensates were found. There was predicted the possibility of an abrupt type of photon condensation in the presence of Bose condensate of ground-state atoms: it was shown that the slightest decrease of the temperature could cause a significant gathering of photons in the condensate. This case could be treated as a simple model of the situation known as "stopped light" in cold atomic gas. We also showed how population inversion of atomic levels can be created by lowering the temperature. The latter situation looks promising for light accumulation in atomic vapor at very low temperatures.

18 pages, 3 figures

References in corpus (6)

• Bose-Einstein condensation of photons in an optical microcavity
• Hierarchical maximum entropy principle for generalized superstatistical systems and Bose-Einstein condensation of light
• Bose-Einstein condensation of light in a cavity
• Green-function method in the theory of ultraslow electromagnetic waves in an ideal gas with Bose-Einstein condensates
• Bose-Einstein Condensation of Photons in a Microscopic Optical Resonator: Towards Photonic Lattices and Coupled Cavities
• Classical and quantum analysis of a heterotriatomic molecular Bose-Einstein-condensate model

Cited by in corpus (5)

• Bose-Einstein condensation of photons in a plasma
• One-dimensional Bose-Einstein condensation of photons in a microtube
• Aspects of Bose-Einstein condensation in a charged boson system over the dielectric surface
• Statistical theory of photon gas in plasma
• Method of canonical transformations in the theory of quantum gases interacting with radiation