Abstract

We investigate the superfluid-insulator quantum phase transition of one-dimensional bosons with off-diagonal disorder by means of large-scale Monte Carlo simulations. For weak disorder, we find the transition to be in the same universality class as the superfluid-Mott insulator transition of the clean system. The nature of the transition changes for stronger disorder. Beyond a critical disorder strength, we find nonuniversal, disorder-dependent critical behavior. We compare our results to recent perturbative and strong-disorder renormalization group predictions. We also discuss experimental implications as well as extensions of our results to other systems.

Department(s)

Physics

Keywords and Phrases

Clean systems; Critical behavior; Disorder strength; Monte Carlo Simulation; Off-diagonal disorder; One dimension; One-dimensional bosons; Renormalization-group predictions; Superfluid-insulator quantum phase transition; Superfluid-Mott-insulator transition; Universality class; Weak disorder; Phase transitions; Statistical mechanics; Bosons

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2012 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

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