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Related Experiment Videos

Localization of matter waves in two-dimensional disordered optical potentials.

R C Kuhn1, C Miniatura, D Delande

  • 1Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany.

Physical Review Letters
|December 31, 2005
PubMed
Summary

We studied ultracold atoms in disordered potentials, revealing how quantum transport is affected by scattering. Our findings show weak and strong localization effects are observable with current experimental methods.

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Area of Science:

  • Quantum physics
  • Atomic physics
  • Condensed matter physics

Background:

  • Ultracold atoms in 2D optical potentials are a key system for studying quantum transport.
  • Disordered potentials introduce complex scattering phenomena affecting particle behavior.

Purpose of the Study:

  • To calculate microscopic quantities characterizing matter wave quantum transport in ultracold atoms.
  • To investigate the role of coherent multiple scattering and localization effects.

Main Methods:

  • Derivation of the diffusion constant based on microscopic parameters.
  • Analysis of coherent multiple scattering in disordered 2D optical potentials.
  • Calculation of localization length in the strong localization regime.

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Main Results:

  • The diffusion constant was derived as a function of microscopic parameters.
  • Significant weak localization effects were identified due to coherent multiple scattering.
  • Accessibility of the strong localization regime with current experimental techniques was demonstrated.

Conclusions:

  • Coherent multiple scattering significantly impacts quantum transport, leading to weak localization.
  • The strong localization regime and its localization length are experimentally accessible.
  • This research provides a microscopic understanding of quantum transport in disordered ultracold atom systems.