Dissipative Stern-Gerlach recombination experiment

Details Dissipative Stern-Gerlach recombination experiment Dissipative Stern-Gerlach recombination experiment

2006-01-11

arxiv.org/abs/quant-ph/0601070v1

Physics

Quantum Physics

8 pages, 6 figures, Submitted to Phys. Rev. A

Scientific paper

The possibility of obtaining the initial pure state in a usual Stern-Gerlach experiment through the recombination of the two emerging beams is investigated. We have extended the previous work of Englert, Schwinger and Scully \cite{ISG1} including the fluctuations of the magnetic field generated by a properly chosen magnet. As a result we obtained an attenuation factor to the possible revival of coherence when the beams are perfectly recombined . When the source of the magnetic field is a SQUID(superconducting quantum interference device) the attenuation factor can be controlled by external circuits and the spin decoherence directly measured. For the proposed SQUID with dimensions in the scale of microns the attenuation factor has been shown unimportant when compared with the interaction time of the spin with the magnet.

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