Quantum field effects in coupled atomic and molecular Bose-Einstein condensates

Details Quantum field effects in coupled atomic and molecular Bose-Einstein condensates Quantum field effects in coupled atomic and molecular Bose-Einstein condensates

2001-06-21

arxiv.org/abs/cond-mat/0106427v1

Physics

Condensed Matter

4 postscript figures

Scientific paper

10.1103/PhysRevA.64.053608

This paper examines the parameter regimes in which coupled atomic and molecular Bose-Einstein condensates do not obey the Gross-Pitaevskii equation. Stochastic field equations for coupled atomic and molecular condensates are derived using the functional positive-P representation. These equations describe the full quantum state of the coupled condensates and include the commonly used Gross-Pitaevskii equation as the noiseless limit. The model includes all interactions between the particles, background gas losses, two-body losses and the numerical simulations are performed in three dimensions. It is found that it is possible to differentiate the quantum and semiclassical behaviour when the particle density is sufficiently low and the coupling is sufficiently strong.

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