Dispersion relation and excitation character of a two-component Bose-Einstein condensate

Abstract

We present a study for the dispersion relation and character of the excitations of a single and two component Bose Einstein Condensate (BEC). We study the single component dispersion for a finite BEC system and look at examples of quasiparticles to understand and characterize the dispersion relation. Next we present the dispersion relation for a two component BEC in both the miscible and immiscible parameter regimes. Then we present examples of the quasiparticles for both regimes.

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• Critical wetting, first-order wetting and prewetting phase transitions in binary mixtures of Bose-Einstein condensates
• Optical lattice influenced geometry of quasi-2D binary condensates and quasiparticle spectra
• Characteristic temperature for the immiscible-miscible transition of binary condensates in optical lattices
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• Quasiparticle spectra of mixtures of dipolar and non-dipolar condensates at zero and finite temperatures
• Collective modes of two-species Bose-Einstein condensates in a Josephson junction barrier