Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.87.052139
Title: Anomalous decoherence in a dissipative two-level system
Authors: Liu, H.-B.
An, J.-H. 
Chen, C.
Tong, Q.-J.
Luo, H.-G.
Oh, C.H. 
Issue Date: 31-May-2013
Source: Liu, H.-B., An, J.-H., Chen, C., Tong, Q.-J., Luo, H.-G., Oh, C.H. (2013-05-31). Anomalous decoherence in a dissipative two-level system. Physical Review A - Atomic, Molecular, and Optical Physics 87 (5) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.87.052139
Abstract: We study systematically the non-Markovian decoherence dynamics of a dissipative two-level system, i.e., the so-called spin-boson model. It is interesting to find that the decoherence tends to be inhibited with the increase of the coupling strength between the system and the reservoir, which is contrary to the common recognition that a stronger coupling always induces a severer decoherence. This is attributed to the occurrence of a quantum phase transition (QPT). The relationship between this QPT and conventional delocalized-localized QPT is also discussed. Our result suggests a useful control method to overcome the detrimental effects of the reservoir to the system. © 2013 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/52788
ISSN: 10502947
DOI: 10.1103/PhysRevA.87.052139
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