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Title: Preferred states of decoherence under intermediate system-environment coupling
Authors: Wang, W.-G. 
He, L.
Gong, J. 
Issue Date: 17-Feb-2012
Citation: Wang, W.-G., He, L., Gong, J. (2012-02-17). Preferred states of decoherence under intermediate system-environment coupling. Physical Review Letters 108 (7) : -. ScholarBank@NUS Repository.
Abstract: The notion that decoherence rapidly reduces a superposition state to an incoherent mixture implicitly adopts a special representation, namely, the representation of preferred (pointer) states (PS). For weak or strong system-envrionment interaction, the behavior of PS is well known. Via a simple dynamical model that simulates a two-level system interacting with few other degrees of freedom as its environment, it is shown that even for intermediate system-environment coupling, approximate PS may still emerge from the coherent quantum dynamics of the whole system in the absence of any thermal averaging. The found PS can also continuously deform to expected limits for weak or strong system-environment coupling. Computational results are also qualitatively explained. The findings should be useful towards further understanding of decoherence and quantum thermalization processes. © 2012 American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.108.070403
Appears in Collections:Staff Publications

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