D D Bhaktavatsala Rao et al 2008 New J. Phys. 10 115017 doi:10.1088/1367-2630/10/11/115017
Quantum frustration of dissipation by a spin bath
Focus on Quantum Dissipation in Unconventional EnvironmentsD D Bhaktavatsala Rao1, Heiner Kohler2 and Fernando Sols3
Show affiliationsPart of Focus on Quantum Dissipation in Unconventional Environments
We investigate the evolution of a central spin coupled to a spin bath without internal dynamics. We compare the case where a single bath couples to one component of the spin with that of two competing baths coupling symmetrically to orthogonal spin components. It is found that the central spin dynamics is enhanced in the latter case, which may be interpreted as a frustration of dissipation. The quantum purity of the spin decays in both cases, exponentially for a single bath and algebraically for a double bath. We conclude that the symmetric double coupling frustrates dissipation and slows down decoherence.
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Issue 11 (November 2008)
Received 9 August 2008
Published 20 November 2008
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Quantum frustration of dissipation by a spin bath
D D Bhaktavatsala Rao et al 2008 New J. Phys. 10 115017
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