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

Abstract

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.

Authors:
; ;  [1]
  1. Department of Physics, University of Toronto, Toronto, Ontario, M5S 1A7 (Canada)
Publication Date:
OSTI Identifier:
6640272
Resource Type:
Journal Article
Journal Name:
Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)
Additional Journal Information:
Journal Volume: 51:2; Journal ID: ISSN 1063-651X
Country of Publication:
United States
Language:
English
Subject:
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-)

Citation Formats

Shi, H, Rastegar, H, and Griffin, A. Bose-Einstein condensation of a coupled two-component Bose gas. United States: N. p., 1995. Web. doi:10.1103/PhysRevE.51.1075.
Shi, H, Rastegar, H, & Griffin, A. Bose-Einstein condensation of a coupled two-component Bose gas. United States. https://doi.org/10.1103/PhysRevE.51.1075
Shi, H, Rastegar, H, and Griffin, A. 1995. "Bose-Einstein condensation of a coupled two-component Bose gas". United States. https://doi.org/10.1103/PhysRevE.51.1075.
@article{osti_6640272,
title = {Bose-Einstein condensation of a coupled two-component Bose gas},
author = {Shi, H and Rastegar, H and Griffin, A},
abstractNote = {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.},
doi = {10.1103/PhysRevE.51.1075},
url = {https://www.osti.gov/biblio/6640272}, journal = {Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)},
issn = {1063-651X},
number = ,
volume = 51:2,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 1995},
month = {Wed Feb 01 00:00:00 EST 1995}
}