Excitation spectrum of a two-dimensional long-range Bose liquid with supersymmetry

E. V. Mozgunov, M. V. Feigel'Man

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1 Citation (Scopus)

Abstract

We have studied the excitation spectrum of the specific two-dimensional model of strongly interacting Bose particles via mapping of the many-body Schrödinger equation in imaginary time to the classical stochastic dynamics. In a broad range of coupling strengths α, a roton-like spectrum is found, with the roton gap being extremely small in natural units. A single quantum phase transition between a strongly correlated superfluid and a quantum Berezinsky crystal is found.

Original languageEnglish
Article number104515
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number10
DOIs
Publication statusPublished - 21 Mar 2011
Externally publishedYes

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