We study, within the spin-boson dynamics, the synchronization of a quantum tunnelling system with an external, time-periodic driving signal [1]. As a main result we find that at a sufficiently large system-bath coupling strength (i.e. for a friction strength α>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 tunnelling rate. As an application evidencing the effect, we consider the charge transfer dynamics in molecular complexes.
[1] I. Goychuk, J. Casado-Pascual, M. Morillo, J. Lehmann, P. Hänggi, Phys. Rev. Lett. 97, 210601 (2006).
We study, within the spin-boson dynamics, the synchronization of a quantum tunnelling system with an external, time-periodic driving signal [1]. As a main result we find that at a sufficiently large system-bath coupling strength (i.e. for a friction strength α>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 tunnelling rate. As an application evidencing the effect, we consider the charge transfer dynamics in molecular complexes.
[1] I. Goychuk, J. Casado-Pascual, M. Morillo, J. Lehmann, P. Hänggi, Phys. Rev. Lett. 97, 210601 (2006).
