Ground state correlations in a trapped quasi one-dimensional Bose gas

[摘要] We review the basic concepts of a non-equilibrium kinetic theory of a trapped bosonic gas. By extending the successful mean-field concept of the Gross-Pitaevskii equation with the effects of non-local. two particle quantum correlations, one obtains a renormalized binary interaction and allows for the dynamic establishment of non-classical many-particle quantum correlations. These concepts are illustrated by self-consistent numerical calculations of the first- and second-order ground state quantum correlations of a harmonically trapped, quasi one-dimensional bosonic gas. We do find a strong suppression of the density fluctuations or. in other words. an enhanced number squeezing with decreasing particle density. (C) 2004 Elsevier B.V. All rights reserved.

[发布日期] 2004-12-21

[关键词] quasi one-dimensional Bose gas;ground state correlations;Hartree-Fork-Bogoliubov