Time domain deBroglie wave interferometry along a magnetic guide

Details Time domain deBroglie wave interferometry along a magnetic guide Time domain deBroglie wave interferometry along a magnetic guide

2005-03-16

arxiv.org/abs/physics/0503130v3

Eur. Phys. J. D35: 111-118 (2005)

Physics

Atomic Physics

22 pages, 7 figures

Scientific paper

10.1140/epjd/e2005-00212-8

Time domain deBroglie wave interferometry [Cahn et al, Phys. Rev. Lett. 79, 784] is applied to Rb87 atoms in a magnetic guide. A standing wave light field is carefully aligned along the guiding direction of the magnetic trapping potential from a soft-ferromagnetic 4-foil structure. A sequence of two standing wave pulses is applied to the magnetically trapped atoms. The backscattered light at the atomic density grating revival time is collected and detected via a heterodyning technique. In addition to the observed recoil oscillations that fit the interferometer theory for atoms in free space, we observe a decay of the interferometer contrast on a millisecond time scale with unexpected millisecond-scale oscillations. We find that the oscillating decay is explained by a residual variation of the linear trapping potential along the standing wave direction.

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