Abstract Submitted for the MAR05 Meeting of The American Physical Society Superfluidity of interacting bosons in one-dimension via strong disorder

Submitted for the MAR05 Meeting of The American Physical Society Superfluidity of interacting bosons in one-dimension via strong disorder NOAH BRAY-ALI, UC Berkeley, Physics Department, JOEL MOORE, UC Berkeley, Physics Department; Lawrence Berkeley National Laboratory, Materials Science Division — We have found a novel set of superfluid and Mott insulating phases arising in strongly-disordered, one-dimensional optical lattices with large, commensurate filling of bosons. Using a spin-wave approach, we show that the bosons form a true, long-range ordered superfluid at T = 0, provided that the onsite repulsion has a broad distribution. Such broad, power-law distributions arise naturally under real-space renormalization group flow. Furthermore, they describe the asymptotic properties of diluted two-dimensional optical lattices near percolation threshold. We discuss the possibility of true superfluidity in the diluted system. Noah Bray-Ali UC Berkeley, Physics Department Date submitted: 27 Dec 2004 Electronic form version 1.4