Physics – Quantum Physics
Scientific paper
2011-01-19
Eur. Phys. J. D 65, 33--42 (2011)
Physics
Quantum Physics
10 pages
Scientific paper
10.1140/epjd/e2011-20050-3
We develop a mean-field model describing the Hamiltonian interaction of ultracold atoms and the optical field in a cavity. The Bose-Einstein condensate is properly defined by means of a grand-canonical approach. The model is efficient because only the relevant excitation modes are taken into account. However, the model goes beyond the two-mode subspace necessary to describe the self-organization quantum phase transition observed recently. We calculate all the second-order correlations of the coupled atom field and radiation field hybrid bosonic system, including the entanglement between the two types of fields.
Domokos Peter
Konya G.
Szirmai Gergely
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