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arXiv · 0812.3005

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

H. Lignier·A. Zenesini·D. Ciampini·O. Morsch·E. Arimondo·S. Montangero·G. Pupillo·R. Fazio
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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.

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H. Lignier, A. Zenesini, D. Ciampini, O. Morsch, E. Arimondo, S. Montangero, G. Pupillo, R. Fazio. 2008-12-16. Trap modulation spectroscopy of the Mott-insulator transition in optical lattices. https://doi.org/10.1103/physreva.79.041601

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