Probing States in the Mott Insulator Regime

Details Probing States in the Mott Insulator Regime Probing States in the Mott Insulator Regime

2002-08-12

arxiv.org/abs/cond-mat/0208208v2

Phys. Rev. Lett. 90, 150401 (2003)

Physics

Condensed Matter

4 pages, 3 figures. Send correspondence to d.roberts1@physics.ox.ac.uk

Scientific paper

10.1103/PhysRevLett.90.150401

We propose a method to probe states in the Mott insulator regime produced from a condensate in an optical lattice. We consider a system in which we create time-dependent number fluctuations in a given site by turning off the atomic interactions and lowering the potential barriers on a nearly pure Mott state to allow the atoms to tunnel between sites. We calculate the expected interference pattern and number fluctuations from such a system and show that one can potentially observe a deviation from a pure Mott state. We also discuss a method in which to detect these number fluctuations using time-of-flight imaging.

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