Role of Bose statistics in crystallization and quantum jamming

The indistinguishability of particles is a crucial factor destabilizing crystalline order in Bose systems. We describe this effect in terms of damped quasiparticle modes and in the dual language of Feynman paths, and illustrate it by first-principles simulations of dipolar bosons and bulk condensed...

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Bibliographic Details
Published in:Physical review letters 2012-07, Vol.109 (2), p.025302-025302, Article 025302
Main Authors: Boninsegni, M, Pollet, L, Prokof'ev, N, Svistunov, B
Format: Article
Language:English
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Summary:The indistinguishability of particles is a crucial factor destabilizing crystalline order in Bose systems. We describe this effect in terms of damped quasiparticle modes and in the dual language of Feynman paths, and illustrate it by first-principles simulations of dipolar bosons and bulk condensed 4He. The first major implication is that, contrary to conventional wisdom, zero-point motion alone cannot prevent 4He crystallization at near zero pressure. Second, Bose statistics leads to quantum jamming at finite temperature, dramatically enhancing the metastability of superfluid glasses. Only studies of indistinguishable particles can reliably address these issues.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.109.025302