Strongly interacting bosons in a disordered optical lattice

M. White, M. Pasienski, D. McKay, S. Q. Zhou, D. Ceperley, B. Demarco

Research output: Contribution to journalArticlepeer-review


We experimentally probe the properties of the disordered Bose-Hubbard model using an atomic Bose-Einstein condensate trapped in a 3D disordered optical lattice. Controllable disorder is introduced using a fine-grained optical speckle field with features comparable in size to the lattice spacing along every lattice direction. A precision measurement of the disordering potential is used to compute the single-particle parameters of the system. To constrain theories of the disordered Bose Hubbard model, we have measured the change in condensate fraction as a function of disorder strength for several different ratios of tunneling to interaction energy. We observe disorder-induced, reversible suppression of condensate fraction for superfluid and coexisting superfluid-Mott-insulator phases.

Original languageEnglish (US)
Article number055301
JournalPhysical review letters
Issue number5
StatePublished - Feb 2 2009

ASJC Scopus subject areas

  • General Physics and Astronomy


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