Quantum effects on curve crossing in a Bose-Einstein condensate

Details Quantum effects on curve crossing in a Bose-Einstein condensate Quantum effects on curve crossing in a Bose-Einstein condensate

2001-08-23

arxiv.org/abs/cond-mat/0108372v1

Phys. Rev. A 65 (2002) 043607

Physics

Condensed Matter

LaTeX, 5 pages, uses REVTeX, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevA.65.043607

Formation of atomic pairs by the dissociation of a molecular condensate or by inelastic collisions in an atomic condensate due to a time-dependent curve crossing process is studied beyond the mean-field approximation. The number of atoms formed by the spontaneous process is described by a Landau-Zener formula multiplied by an exponential amplification factor due to quantum many-body effects. The atomic pairs are formed in an entangled (squeezed) state. The rate of stimulated processes depends on the relative phase of the two fields.

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