Fundamental Limits for Coherent Manipulation on Atom Chips

Details Fundamental Limits for Coherent Manipulation on Atom Chips Fundamental Limits for Coherent Manipulation on Atom Chips

2002-08-27

arxiv.org/abs/quant-ph/0208165v2

Appl. Phys. B. 76, 173 (2003)

Physics

Quantum Physics

selected papers of the DPG spring meeting `Quantum Optics' (Osnabrueck, Germany, 4-8 march 2002), submitted to Applied Physics

Scientific paper

10.1007/s00340-003-1112-z

The limitations for the coherent manipulation of neutral atoms with fabricated solid state devices, so-called `atom chips', are addressed. Specifically, we examine the dominant decoherence mechanism, which is due to the magnetic noise originating from the surface of the atom chip. It is shown that the contribution of fluctuations in the chip wires at the shot noise level is not negligible. We estimate the coherence times and discuss ways to increase them. Our main conclusion is that future advances should allow for coherence times as long as one second, a few micrometers away from the surface.

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