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arxiv: 1310.0601 · v1 · pith:WDQYA6HQnew · submitted 2013-10-02 · ❄️ cond-mat.str-el · cond-mat.dis-nn

Spin wave theory for 2D disordered hard-core bosons

classification ❄️ cond-mat.str-el cond-mat.dis-nn
keywords bosonsdiscussedhard-corelocalizationrandomapproachboseboson
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A spin-wave (SW) approach for hard-core bosons is presented to treat the problem of two dimensional boson localization in a random potential. After a short review of the method to compute 1/S-corrected observables, the case of random on-site energy is discussed. Whereas the mean-field solution does not display a Bose glass (BG) phase, 1/S corrections do capture BG physics. In particular, the localization of SW excitations is discussed through the inverse participation ratio.

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