Dynamical phase interferometry of cold atoms in optical lattices

Details Dynamical phase interferometry of cold atoms in optical lattices Dynamical phase interferometry of cold atoms in optical lattices

2011-10-16

arxiv.org/abs/1110.3479v2

Physics

Condensed Matter

Quantum Gases

8 pages, 5 figures

Scientific paper

10.1103/PhysRevA.84.063613

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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