Mixed Bubbles in Bose-Bose Mixtures – Archive ouverte HAL

P. NaidonD. s. Petrov 1

P. Naidon, D. s. Petrov. Mixed Bubbles in Bose-Bose Mixtures. Physical Review Letters, American Physical Society, 2021, 126 (11), ⟨10.1103/PhysRevLett.126.115301⟩. ⟨hal-03223902⟩

Repulsive Bose-Bose mixtures are known to either mix or phase-separate into pure components. Here we predict a mixed-bubble regime in which bubbles of the mixed phase coexist with a pure phase of one of the components. This is a beyond-mean-field effect which occurs for unequal masses or unequal intraspecies coupling constants and is due to a competition between the mean-field term, quadratic in densities, and a nonquadratic beyond-mean-field correction. We find parameters of the mixed-bubble regime in all dimensions and discuss implications for current experiments.

  • 1. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques