A Gaussian Theory of Superfluid--Bose-Glass Phase Transition

We show that gaussian quantum fluctuations, even if infinitesimal, are sufficient to destroy the superfluidity of a disordered boson system in 1D and 2D. The critical disorder is thus finite no matter how small the repulsion is between particles. Within the gaussian approximation, we study the natur...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Nisamaneephong, P, Zhang, L, M Ma
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 20.07.1993
Subjects
Elementary excitations
Fluids
Phase transitions
Quantum phenomena
Superfluidity
Online AccessGet full text

Cover

More Information
Summary:We show that gaussian quantum fluctuations, even if infinitesimal, are sufficient to destroy the superfluidity of a disordered boson system in 1D and 2D. The critical disorder is thus finite no matter how small the repulsion is between particles. Within the gaussian approximation, we study the nature of the elementary excitations, including their density of states and mobility edge transition. We give the gaussian exponent \(\eta\) at criticality in 1D and show that its ratio to \(\eta\) of the pure system is universal.
ISSN:2331-8422
DOI:10.48550/arxiv.9307044