期刊
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
卷 19, 期 8, 页码 2745-2753出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218127409024451
关键词
Bose gas; quenched disorder; Hartree-Fock mean-field theory; phase diagram; Bose-glass order parameter; Bose-glass phase
A Hartree-Fock mean-field theory of a weakly interacting Bose-gas in a quenched white noise disorder potential is presented. A direct continuous transition from the normal gas to a localized Bose-glass phase is found which has localized short-lived excitations with a gapless density of states and vanishing superfluid density. The critical temperature of this transition is as for an ideal gas undergoing Bose-Einstein condensation. Increasing the particle-number density a first-order transition from the localized state to a superfluid phase perturbed by disorder is found. At intermediate number densities both phases can coexist.
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