Bose-Einstein condensation of a coupled two-component Bose gas

Journal Article · Wed Feb 01 00:00:00 EST 1995 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.51.1075· OSTI ID:6640272

Shi, H; Rastegar, H; Griffin, A ^[1]

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1. Department of Physics, University of Toronto, Toronto, Ontario, M5S 1A7 (Canada)

In experiments on excitons and spin-polarized atomic hydrogen, one deals with a gas involving two Bose branches (for example, paraexcitons and orthoexcitons). Based on a simple model for the coupling between these two components, we discuss how interconversion processes affect Bose condensation in such a system. Our analysis is based on an exact transformation to renormalized Bose particles which are uncoupled. We give results for the condensate fraction as a function of the temperature in the case when the two original Bose particles ([ital a] and [ital b]) are not in chemical equilibrium (i.e., the chemical potentials [mu][sub [ital a]] and [mu][sub [ital b]] are not equal) as well as in the case of chemical equilibrium ([mu][sub [ital a]]=[mu][sub [ital b]]). Our results are of interest in connection with current attempts to observe Bose condensation in atomiclike gases.

• OSTI ID: 6640272
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Vol. 51:2; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
BOSE-EINSTEIN GAS
COPPER OXIDES
ELECTRON-HOLE COUPLING
EXCITONS
HAMILTONIANS
HYDROGEN
TEMPERATURE DEPENDENCE
CHALCOGENIDES
COPPER COMPOUNDS
COUPLING
ELEMENTS
MATHEMATICAL OPERATORS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
QUANTUM OPERATORS
QUASI PARTICLES
TRANSITION ELEMENT COMPOUNDS
661300* - Other Aspects of Physical Science- (1992-)