Journal
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
Volume 36, Issue 49, Pages 12305-12327Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0305-4470/36/49/012
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A low-temperature model system consisting of a central spin coupled to a spin-bath is studied to determine whether interaction among bath spins has an effect on central spin dynamics. In the absence of intra-environmental coupling, decoherence of the central spin is fast and irreversible. Strong intra-environmental interaction results in an effective decoupling of the central spin from the bath and suppression of decoherence. Weaker intra-environmental coupling reduces but does not eliminate decoherence. We argue that similar suppression of decoherence should be observed for electronic states of He impurities in silicon or diamond.
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