Ground state and quasiparticle spectrum of a two-component Bose-Einstein condensate

C. P. Search, A. G. Rojo, P. R. Berman

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We consider a dilute homogenous atomic Bose-Einstein condensate with two nondegenerate internal energy levels that achieve a state of chemical equilibrium in the presence of an external radiation field that couples the two states. The presence of the radiation field can result in new ground states for the condensate as a consequence of the lowering of the condensate energy due to the interaction energy with the field. We analyze the ground-state energy as a function of the coupling constants for the two-body interactions, the Rabi frequency of the radiation field, and the detuning of the field, and we give explicit expressions for the quasiparticle excitation spectrum.

Original languageEnglish
Pages (from-to)7
Number of pages1
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume64
Issue number1
DOIs
StatePublished - 2001

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