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Decoherence of cold atomic gases in magnetic microtraps

Date Issued
2003-01-01
Author(s)
Schroll, C
Belzig, W
Bruder, C  
DOI
10.1103/physreva.68.043618
Abstract
We derive a model to describe decoherence of atomic clouds in atom-chip traps taking the excited states of the trapping potential into account. We use this model to investigate decoherence for a single trapping well and for a pair of trapping wells that form the two arms of an atom interferometer. Including the discrete spectrum of the trapping potential gives rise to a decoherence mechanism with a decoherence rate Gamma that scales like Gamma similar to 1/r(0)(4) with the distance r(0) from the trap minimum to the wire.
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