2010/09/27 by Shiang Fang, Chia-Ming Chung, Ping Nang Ma +2 · 1 citation
Physics and Astronomy · #cond-mat.quant-gas #cond-mat.stat-mech
paper · pdf · doi:10.1103/physreva.83.031605
published as Phys. Rev. A 83, 031605(R) (2011) · 4 pages
arxiv created 2010/09/27 · arxiv updated 2011/03/16
We perform large-scale Quantum Monte Carlo (QMC) simulations for strongly interacting bosons in a 2D optical lattice trap, and confirm an excellent agreement with the benchmarking in-situ density measurements by the Chicago group [1]. We further present a general finite temperature phase diagram both for the uniform and the trapped systems, and demonstrate how the universal scaling properties near the superfluid(SF)-to-Mott insulator(MI) transition can be observed by analysing the in-situ density profile. The characteristic temperature to find such quantum criticality is estimated to be of the order of the single-particle bandwidth, which should be achievable in the present or near future experiments. Finally, we examine the validity regime of the local fluctuation-dissipation theorem (FDT), which can be a used as a thermometry in the strongly interacting regime.