Phase transition of one dimensional bosons with strong disorder

Ehud Altman, Yariv Kafri, Anatoli Polkovnikov, Gil Refael

Published 2004-02-06, updated 2004-06-29Version 2

We study one dimensional disordered bosons at large commensurate filling. Using a real space renormalization group approach we find a new random fixed point which controls a phase transition from a superfluid to an incompressible Mott-glass. The transition can be tuned by changing the disorder distribution even with vanishing interactions. We derive the properties of the transition, which suggest that it is in the Kosterlitz-Thouless universality class.