Density matrix renormalization group for disordered bosons in one dimension

Preprint

11 January 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9901080

Abstract

We calculate the zero-temperature phase diagram of the disordered Bose-Hubbard model in one dimension using the density matrix renormalization group. For integer filling the Mott insulator is always separated from the superfluid by a Bose glass phase. There is a reentrance of the Bose glass both as a function of the repulsive interaction and of disorder. At half-filling where no Mott insulator exists, the superfluid density has a maximum where the kinetic and repulsive energies are about the same. Superfluidity is suppressed both for small and very strong repulsion but is always monotonic in disorder.

Keywords

DENSITY MATRIX RENORMALIZATION
MATRIX RENORMALIZATION GROUP
RENORMALIZATION GROUP
SUPERFLUID DENSITY
DISORDERED BOSONS
REPULSIVE

All Related Versions

Version 1, 1999-01-11, ArXiv
Published version: Europhysics Letters, 46 (5), 559.

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