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arXiv · 1712.08245

Superfluid density and compressibility at the superfluid-Mott glass transition

Cameron Lerch·Thomas Vojta
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Abstract

Systems of disordered interacting bosons with particle-hole symmetry can undergo a quantum phase transition between the superfluid phase and the Mott glass phase which is a gapless incompressible insulator. We employ large-scale Monte Carlo simulations of a two-dimensional site-diluted quantum rotor model to investigate the properties of the superfluid density and the compressibility at this transition. We find that both quantities feature power-law critical behavior with exponents governed by generalized Josephson relations.

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Cameron Lerch, Thomas Vojta. 2017-12-21. Superfluid density and compressibility at the superfluid-Mott glass transition. https://doi.org/10.1140/epjst%2Fe2018-800002-2

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