Quantum phase diffusion of a Bose system: beyond the Hartree-Fock-Bogoliubov approximation
Quantum Physics
2007-08-03 v1
Abstract
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.
Cite
@article{arxiv.0708.0356,
title = {Quantum phase diffusion of a Bose system: beyond the Hartree-Fock-Bogoliubov approximation},
author = {Ferdinando de Pasquale and Gian Luca Giorgi},
journal= {arXiv preprint arXiv:0708.0356},
year = {2007}
}