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Suppression of the critical temperature for superfluidity near the Mott transition
Nature Physics
  • S Trotzky
  • L Pollet, University of Massachusetts - Amherst
  • F Gerbier
  • U Schnorrberger
  • I Bloch
  • Nikolai Prokof'ev, University of Massachusetts - Amherst
  • Boris Svistunov, University of Massachusetts - Amherst
  • M Troyer
Publication Date

Ultracold atomic gases in optical lattices have proven to be a controllable, tunable and clean implementation of strongly interacting quantum many-body systems. An essential prospect for such quantum simulators is their ability to map out the phase diagram of fundamental many-body model Hamiltonians. However, the results need to be validated first for representative benchmark problems through state-of-the-art numerical methods of quantum many-body theory. Here we present the first ab initio comparison between experiments and quantum Monte Carlo simulations for strongly interacting Bose gases on a lattice for large systems (up to particles). The comparison enables thermometry for the interacting quantum gas and to experimentally determine the finite-temperature phase diagram for bosonic superfluids in an optical lattice, revealing a suppression of the critical temperature as the transition to the Mott insulator is approached.

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Citation Information
S Trotzky, L Pollet, F Gerbier, U Schnorrberger, et al.. "Suppression of the critical temperature for superfluidity near the Mott transition" Nature Physics Vol. 6 (2010)
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