Polaritons and Pairing Phenomena in Bose-Hubbard Mixtures
- Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom)
Motivated by recent experiments on cold atomic gases in ultrahigh finesse optical cavities, we consider the two-band Bose-Hubbard model coupled to quantum light. Photoexcitation promotes carriers between the bands, and we study the interplay between Mott insulating behavior and superfluidity. The model displays a U(1)xU(1) symmetry which supports the coexistence of Mott insulating and superfluid phases and yields a rich phase diagram with multicritical points. This symmetry is shared by several other problems of current experimental interest, including two-component Bose gases in optical lattices and the bosonic BEC-BCS crossover for atom-molecule mixtures induced by a Feshbach resonance. We corroborate our findings by numerical simulations.
- OSTI ID:
- 21180338
- Journal Information:
- Physical Review Letters, Vol. 102, Issue 13; Other Information: DOI: 10.1103/PhysRevLett.102.135301; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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