Disordered bosons in one dimension: from weak to strong randomness criticality

Fawaz Hrahsheh; Thomas Vojta

doi:10.1103/physrevlett.109.265303

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arXiv · 1210.4807

Disordered bosons in one dimension: from weak to strong randomness criticality

Fawaz Hrahsheh·Thomas Vojta

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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.

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BibTeX RIS

Fawaz Hrahsheh, Thomas Vojta. 2013-01-02. Disordered bosons in one dimension: from weak to strong randomness criticality. https://doi.org/10.1103/physrevlett.109.265303

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