Ground State and Excitations of Disordered Boson Systems

Details Ground State and Excitations of Disordered Boson Systems Ground State and Excitations of Disordered Boson Systems

1993-11-03

arxiv.org/abs/cond-mat/9311007v1

Physics

Condensed Matter

13 pages. (postscript file because of the figures inserted in the text.)

Scientific paper

10.1007/BF00692042

After an introduction to the dirty bosons problem, we present a gaussian theory for the ground state and excitations. This approach is physically equivalent to the Bogoliubov approximation. We find that ODLRO can be destroyed with sufficient disorder. The density of states and localization of the elementary excitations are discussed. (To appear in JLTP Proceedings of the Conference on Condensed Bose Systems at the University of Minnesota, 1993.)

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