Bosonic binary mixtures with Josephson-type interactions

Valéria de C. Souza, Zochil González Arenas, Daniel G. Barci and Cesar A. Linhares

Physica A: Statistical Mechanics and its Applications, 2016, vol. 450, issue C, 134-147

Abstract: Motivated by experiments in bosonic mixtures composed of a single element in two different hyperfine states, we study bosonic binary mixtures in the presence of Josephson interactions between species. We focus on a particular model with O(2) isospin symmetry, lifted by an imbalanced population parametrized by a Rabi frequency, ΩR, and a detuning, ν, which couples the phases of both species. We have studied the model at mean-field approximation plus Gaussian fluctuations. We have found that both species simultaneously condensate below a critical temperature Tc and the relative phases are locked by the applied laser phase, α. Moreover, the condensate fractions are strongly dependent on the ratio ΩR/∣ν∣ that is not affected by thermal fluctuations.

Keywords: Bose–Einstein condensation; Effective potential; Finite temperature field theory; Binary mixtures (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:450:y:2016:i:c:p:134-147

DOI: 10.1016/j.physa.2015.12.146

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