Quantum stochastic synchronization

We study, within the spin-boson dynamics, the synchronization of a quantum tunneling system with an external, time-periodic driving signal. As a main result, we find that at a sufficiently large system-bath coupling strength (i.e., for a friction strength alpha > 1) the thermal noise plays a cons...

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Bibliographic Details
Published in:Physical review letters 2006-11, Vol.97 (21), p.210601-210601, Article 210601
Main Authors: Goychuk, Igor, Casado-Pascual, Jesús, Morillo, Manuel, Lehmann, Jörg, Hänggi, Peter
Format: Article
Language:English
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Summary:We study, within the spin-boson dynamics, the synchronization of a quantum tunneling system with an external, time-periodic driving signal. As a main result, we find that at a sufficiently large system-bath coupling strength (i.e., for a friction strength alpha > 1) the thermal noise plays a constructive role in yielding forced synchronization. This noise-induced synchronization can occur when the driving frequency is larger than the zero-temperature tunneling rate. As an application evidencing the effect, we consider the charge transfer dynamics in molecular complexes.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.97.210601