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Related Experiment Videos

Resonant activation in a nonadiabatically driven optical lattice.

R Gommers1, P Douglas, S Bergamini

  • 1Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.

Physical Review Letters
|May 21, 2005
PubMed
Summary

We observed resonant activation in a driven optical lattice, controlling atom diffusion direction with driving frequency. This phenomenon arises from the interplay between driving and fluctuations.

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Area of Science:

  • Atomic physics
  • Quantum optics
  • Condensed matter physics

Background:

  • Optical lattices are crucial for simulating quantum systems.
  • Broken time symmetry can lead to novel transport phenomena.
  • Dissipative systems exhibit unique dynamics influenced by environmental interactions.

Purpose of the Study:

  • To demonstrate resonant activation in a nonadiabatically driven optical lattice with broken time symmetry.
  • To investigate the role of driving frequency on atomic current and diffusion.
  • To explore the control of diffusion direction via frequency manipulation.

Main Methods:

  • Utilizing a dissipative optical lattice with broken time symmetry.
  • Applying non-adiabatic driving with varying frequencies.

Related Experiment Videos

  • Analyzing atomic current and diffusion through the periodic potential.

    • Main Results:

    • Observed resonant activation, a resonance in atomic current as a function of driving frequency.
    • Identified the interplay between deterministic driving and fluctuations as the cause of resonance.
    • Demonstrated control over diffusion direction by adjusting the driving frequency.

    Conclusions:

    • Resonant activation is a viable phenomenon in driven dissipative optical lattices.
    • Driving frequency serves as a key parameter to control atomic transport and diffusion direction.
    • The findings offer insights into manipulating quantum systems with broken time symmetry.