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Related Experiment Videos

Quantum stochastic synchronization.

Igor Goychuk1, Jesús Casado-Pascual, Manuel Morillo

  • 1Institut für Physik, Universität Augsburg, Universitätsstrasse 1, D-86135 Augsburg, Germany.

Physical Review Letters
|December 13, 2006
PubMed
Summary
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Thermal noise aids quantum tunneling synchronization in spin-boson dynamics. This noise-induced synchronization occurs with strong system-bath coupling and driving frequencies exceeding the tunneling rate.

Area of Science:

  • Quantum dynamics
  • Condensed matter physics
  • Chemical physics

Background:

  • Spin-boson dynamics describe quantum systems interacting with their environment.
  • Synchronization involves aligning a system's behavior with an external periodic signal.
  • Quantum tunneling is a key phenomenon in molecular processes.

Purpose of the Study:

  • To investigate the role of thermal noise in the synchronization of quantum tunneling systems.
  • To explore conditions under which noise can induce forced synchronization.
  • To apply these findings to charge transfer in molecular complexes.

Main Methods:

  • Theoretical analysis within the spin-boson model.
  • Investigating the influence of system-bath coupling strength (friction).

Related Experiment Videos

  • Analyzing the impact of driving frequency relative to the tunneling rate.

    • Main Results:

    • Sufficiently strong system-bath coupling (friction strength alpha > 1) leads to noise-induced forced synchronization.
    • Synchronization is observed even when the driving frequency is higher than the zero-temperature tunneling rate.
    • The constructive role of thermal noise in quantum synchronization is demonstrated.

    Conclusions:

    • Thermal noise can be beneficial for achieving forced synchronization in quantum tunneling systems.
    • This phenomenon has implications for controlling quantum dynamics, such as charge transfer.
    • The findings provide insights into noise-assisted quantum transport.