Interacting Bose-condensed gases
arXiv:2212.08065 · doi:10.1016/B978-0-323-90800-9.00156-6
Abstract
We provide an overview of the effects of interactions in Bose-condensed gases. We focus on phenomena that have been explored in ultracold atom experiments, covering both tuneable contact interactions and dipolar interactions. Our discussion includes: modifications to the ground state and excitation spectrum, critical behaviour near the Bose--Einstein condensation temperature, the unitary regime where the interactions are as strong as allowed by quantum mechanics, quantum droplets in mixtures, and supersolids in dipolar gases.
9 pages, 8 figures, invited contribution to Encyclopedia of Condensed Matter Physics, 2nd edition
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