Phys. Rev. A 78, 032105 (2008) [12 pages]Quantum dynamics in nonequilibrium environmentsReceived 30 April 2008; revised 24 June 2008; published 8 September 2008 We present a formalism for studying the behavior of quantum systems coupled to nonequilibrium environments exhibiting non-Gaussian fluctuations. We discuss the role of a qubit as a detector of the statistics of environmental fluctuations, as well as non-Markovian effects in both weak and strong-coupling limits. We also discuss the differences between the influences of classical and quantum environments. As examples of the application of this formalism we study the dephasing and relaxation of a charge qubit coupled to nonequilibrium electron transport through single and double quantum dots. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.032105
DOI:
10.1103/PhysRevA.78.032105
PACS:
03.65.Yz, 05.60.Gg, 05.40.−a, 73.23.−b
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