Publication Date

2010

Journal or Book Title

Nature Physics

Abstract

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.

Comments

This is the pre-published version harvested from ArXiv. The published version is located at http://www.nature.com/nphys/journal/v6/n12/full/nphys1799.html

Volume

6

Pages

998–1004

Included in

Physics Commons

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