Spin bath decoherence mediated by phonons

Bozat, Özgür and Gedik, Zafer (2008) Spin bath decoherence mediated by phonons. Solid State Communications, 148 (5-6). pp. 237-239. ISSN 0038-1098

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Official URL: http://dx.doi.org/10.1016/j.ssc.2008.08.008


We introduce an exactly solvable model to study decoherence of a central spin interacting with a spin bath where the coupling is mediated by phonons which we assume to be in a coherent state or thermal distribution. For the coherent state case, we find that the decoherence factor decays in a Gaussian fashion and it becomes independent of the phonon frequencies at short times. If the phonon energies are much larger than spin–phonon coupling or bath spins are fully polarized, decoherence time becomes independent of the initial phonon state. For the thermal state case, phonons play more important role in decoherence with increasing temperature. We also discuss possible effects of the temperature on spin bath contribution to decoherence.

Item Type:Article
Uncontrolled Keywords:A. Nanostructures; D. Spin dynamic
Subjects:Q Science > QC Physics
ID Code:9190
Deposited By:Zafer Gedik
Deposited On:08 Oct 2008 00:13
Last Modified:25 May 2011 14:21

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