Dynamical phase interferometry of cold atoms in optical lattices

Uri London; Omri Gat

doi:10.1103/physreva.84.063613

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arXiv · 1110.3479

Dynamical phase interferometry of cold atoms in optical lattices

Uri London·Omri Gat

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Abstract

We study the propagation of cold-atom wave packets in an interferometer with a Mach-Zehnder topology based on the dynamical phase of Bloch oscillation in a weakly forced optical lattice with a narrow potential barrier that functions as a cold-atom wave packet splitter. We calculate analytically the atomic wave function, and show that the expected number of atoms in the two outputs of the interferometer oscillates rapidly as a function of the angle between the potential barrier and the forcing direction with period proportional to the external potential difference across a lattice spacing divided by the lattice band energy scale. The interferometer can be used as a high precision force probe whose principle of operation is different from current interferometers based on the overall position of Bloch oscillating wave packets.

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Uri London, Omri Gat. 2011-11-23. Dynamical phase interferometry of cold atoms in optical lattices. https://doi.org/10.1103/physreva.84.063613

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