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Reversible destruction of dynamical localization.

Hans Lignier1, Julien Chabé, Dominique Delande

  • 1Laboratoire de Physique des Lasers, Atomes et Molécules, Centre d'Etudes et de Recherches Laser et Applications, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq Cedex, France.

Physical Review Letters
|December 31, 2005
PubMed
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Dynamical localization, a quantum phenomenon, is destroyed by deviations from periodic driving. Reversing these perturbations partially restores localization, revealing insights into quantum interference effects.

Area of Science:

  • Quantum mechanics
  • Condensed matter physics
  • Nonlinear dynamics

Background:

  • Dynamical localization is a quantum phenomenon observed in systems like the periodically driven kicked rotor.
  • It arises from quantum destructive interference, making it inherently quantum mechanical.
  • Strict periodicity in driving is crucial; deviations rapidly destroy this localization.

Purpose of the Study:

  • To experimentally investigate the reversibility of dynamical localization destruction.
  • To understand the partial nature of this reversibility when perturbations are reversed.
  • To provide a theoretical explanation for the observed partial reversibility.

Main Methods:

  • Experimental realization of a driven quantum system (e.g., kicked rotor).

Related Experiment Videos

  • Introduction of deterministic perturbations to the driving periodicity.
  • Systematic reversal of these perturbations to observe changes in localization.
  • Theoretical modeling to explain the experimental observations.

    • Main Results:

    • Deviation from strict periodicity was confirmed to destroy dynamical localization.
    • Reversing the perturbation partially restored the dynamical localization.
    • A theoretical framework was developed to explain the partial reversibility, highlighting the role of interference.

    Conclusions:

    • The destruction of dynamical localization by perturbations is not entirely irreversible.
    • Partial reversibility offers a new perspective on controlling quantum phenomena in driven systems.
    • Understanding these dynamics is key for applications in quantum control and information processing.