Abstract
Inhibited decoherence has been recently observed in a dissipative two-level system by increasing the strength of the coupling with the reservoir. The system is described by the spin-boson model under a perturbation approach in the delocalized phase regime occurring in weak-coupling limit at zero temperature. Within this scenario, persistence of coherence is found over long times for various low frequency structures of the bosonic environment near a band gap. Special resonances provoke transitions in the long time dynamics if the transition amplitude of the two-level system is greater than the band gap frequency or in absence of any band gap. These transitions may hinder the the loss of coherence in the spin-boson model. Limitations of the approximations are also discussed.
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Giraldi, F., Petruccione, F. Coherence in a dissipative two-level system. Eur. Phys. J. D 68, 144 (2014). https://doi.org/10.1140/epjd/e2014-40720-8
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DOI: https://doi.org/10.1140/epjd/e2014-40720-8