Trap modulation spectroscopy of the Mott-insulator transition in optical lattices
arXiv:0812.3005 · doi:10.1103/PhysRevA.79.041601
Abstract
We introduce a new technique to probe the properties of an interacting cold atomic gas that can be viewed as a dynamical compressibility measurement. We apply this technique to the study of the superfluid to Mott insulator quantum phase transition in one and three dimensions for a bosonic gas trapped in an optical lattice. Excitations of the system are detected by time-of-flight measurements. The experimental data for the one-dimensional case are in good agreement with the results of a time-dependent density matrix renormalization group calculation.
5 pages, 5 figures
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