Momentum-space interferometry with trapped ultracold atoms

Details Momentum-space interferometry with trapped ultracold atoms Momentum-space interferometry with trapped ultracold atoms

2008-10-09

arxiv.org/abs/0810.1720v1

Phys. Rev. A 79, 023616 (2009)

Physics

Quantum Physics

8 pages

Scientific paper

10.1103/PhysRevA.79.023616

Quantum interferometers are generally set so that phase differences between paths in coordinate space combine constructive or destructively. Indeed, the interfering paths can also meet in momentum space leading to momentum-space fringes. We propose and analyze a method to produce interference in momentum space by phase-imprinting part of a trapped atomic cloud with a detuned laser. For one-particle wave functions analytical expressions are found for the fringe width and shift versus the phase imprinted. The effects of unsharpness or displacement of the phase jump are also studied, as well as many-body effects to determine the potential applicability of momentum-space interferometry.

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