Is spin coherence like Humpty-Dumpty? I. Simplified treatment
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When Humpty-Dumpty had his great fall nobody could put him together again. A vastly more moderate challenge is to reunite the two partial beams of a Stern-Gerlach apparatus with such precision that the original spin state is recovered. Nevertheless, as we demonstrate, a substantial loss of spin coherence always occurs, unless the experimenter is able to control the magnetic field's inhomogeneity with an accuracy of at least one part in 105.
KeywordsMagnetic Field Coherence Spin State Substantial Loss Simplify Treatment
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