Phase diagram of bosons in a two-dimensional optical lattice with infinite-range cavity-mediated interactions
A high-finesse optical cavity allows the establishment of long-range interactions between bosons in an optical lattice when most cold-atom experiments are restricted to short-range interactions. Supersolid phases have recently been experimentally observed in such systems. Using both exact quantum Mo...
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| Veröffentlicht in: | Physical review. B 2017-04, Vol.95 (14), p.144501, Article 144501 |
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| container_title | Physical review. B |
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| creator | Flottat, T. de Parny, L. de Forges Hébert, F. Rousseau, V. G. Batrouni, G. G. |
| description | A high-finesse optical cavity allows the establishment of long-range interactions between bosons in an optical lattice when most cold-atom experiments are restricted to short-range interactions. Supersolid phases have recently been experimentally observed in such systems. Using both exact quantum Monte Carlo simulations and the Gutzwiller approximation, we study the ground-state phase diagrams of a two-dimensional Bose-Hubbard model with infinite-range interactions which describes such experiments. In addition to superfluid and insulating Mott phases, the infinite-range checkerboard interactions introduce charge-density waves and supersolid phases. We study here the system at various particle densities, elucidate the nature of the phases and quantum phase transitions, and discuss the stability of the phases with respect to phase separation. In particular we confirm the existence and stability of a supersolid phase detected experimentally. |
| doi_str_mv | 10.1103/PhysRevB.95.144501 |
| format | Article |
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| subjects | Bosons Brittleness Charge density waves Computer simulation Fluids Optical lattices Phase diagrams Phase separation Phase transitions Phases Stability Superfluidity Two dimensional models |
| title | Phase diagram of bosons in a two-dimensional optical lattice with infinite-range cavity-mediated interactions |
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