Quantum phase diffusion of a Bose system: beyond the Hartree-Fock-Bogoliubov approximation

Details Quantum phase diffusion of a Bose system: beyond the Hartree-Fock-Bogoliubov approximation Quantum phase diffusion of a Bose system: beyond the Hartree-Fock-Bogoliubov approximation

2007-08-02

arxiv.org/abs/0708.0356v1

Physics

Quantum Physics

Scientific paper

A diffusion process is usually assumed for the phase of the order parameter
of a Bose system of finite size. The theoretical basis is limited to the so
called Bogoliubov approximation. We show that a suitable generalization of the
Hartree-Fock-Bogoliubov approach recovers phase diffusion.

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