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Related Experiment Videos

Quantum escape kinetics over a fluctuating barrier.

Pulak Kumar Ghosh1, Debashis Barik, Bidhan Chandra Bag

  • 1Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India.

The Journal of Chemical Physics
|December 27, 2005
PubMed
Summary
This summary is machine-generated.

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Resonant activation in fluctuating barriers shows resonance. Quantum effects and tunneling significantly enhance this phenomenon at low temperatures.

Area of Science:

  • Chemical Kinetics
  • Quantum Mechanics
  • Statistical Physics

Background:

  • The escape rate of particles over fluctuating barriers is crucial in chemical reaction kinetics.
  • Resonant activation, where the escape rate peaks at an optimal fluctuation correlation time, is a known phenomenon.

Purpose of the Study:

  • To investigate the impact of quantum mechanics on resonant activation.
  • To explore how tunneling influences resonant activation at low temperatures.

Main Methods:

  • Analysis of a particle's escape rate in a double-well potential with fluctuating barriers.
  • Extension of classical resonant activation theory into the quantum domain.

Main Results:

  • Quantum effects, specifically tunneling, significantly enhance resonant activation.

Related Experiment Videos

  • The phenomenon is most pronounced at low temperatures.

    • Conclusions:

    • Quantization plays a critical role in enhancing resonant activation.
    • Tunneling is a key mechanism for improved resonant activation in the quantum regime.