Protecting and enhancing spin squeezing under decoherence using weak measurement
arXiv:1607.06530 · doi:10.1088/1612-202X/aa6dc7
Abstract
We propose an efficient method to protect spin squeezing under the action of amplitude-damping, depolarizing and phase-damping channels based on measurement reversal from weak measurement, and consider an ensemble of N independent spin-1/2 particles with exchange symmetry. We find that spin squeezing can be enhanced greatly under three different decoherence channels and spin-squeezing sudden death (SSSD) can be avoided undergoing amplitude damping and phase-damping channels.
arXiv admin note: text overlap with arXiv:0909.4834 by other authors
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