Trap modulation spectroscopy of the Mott-insulator transition in optical lattices

Details Trap modulation spectroscopy of the Mott-insulator transition in optical lattices Trap modulation spectroscopy of the Mott-insulator transition in optical lattices

2008-12-16

arxiv.org/abs/0812.3005v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 5 figures

Scientific paper

10.1103/PhysRevA.79.041601

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.

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