2010/12/02 by Evgeny Mozgunov, E. V. Mozgunov, M. V. Feigel’man +1 · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Excitation #Materials science #Phase transition #Physics #Quantum #Quantum mechanics #Quantum, superfluid, helium dynamics #Range (aeronautics) #Roton #Schrödinger's cat #Spectrum (functional analysis) #Superfluidity #Supersymmetry #cond-mat.stat-mech #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.83.104515
published in Physical Review B 83(10) (American Physical Society) · 6 pages, 6 figures
arxiv created 2010/12/02 · openalex publication_date 2011/03/21 · arxiv updated 2015/03/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have studied the excitation spectrum of the specific two-dimensional model of strongly interacting Bose particles via mapping of the many-body Schr"odinger equation in imaginary time to the classical stochastic dynamics. In a broad range of coupling strengths \ensuremathα, 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.