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Related Experiment Video

Updated: Jul 13, 2026

Macro-Rheology Characterization of Gill Raker Mucus in the Silver Carp, Hypophthalmichthys molitrix

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Published on: July 10, 2020

Superfluidity versus Anderson localization in a dilute Bose gas.

T Paul¹, P Schlagheck, P Leboeuf

¹Laboratoire de Physique Théorique et Modèles Statistiques, CNRS, Université Paris Sud, UMR8626, 91405 Orsay Cedex, France.

Physical Review Letters

|August 7, 2007

Summary

We studied Bose-Einstein condensate beams in disordered areas, finding two flow types: superfluid and localized supersonic flow. The supersonic flow disappears in larger disordered samples.

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Area of Science:

Quantum physics
Condensed matter physics

Background:

Bose-Einstein condensates (BECs) exhibit superfluidity.
Disordered potentials can induce Anderson localization.

Purpose of the Study:

Investigate the dynamics of quasi-one-dimensional BEC beams in finite disordered regions.
Analyze the emergence of distinct flow regimes and Anderson localization.

Main Methods:

Analytical computation of particle motion.
Modeling of interaction effects in disordered potentials.

Main Results:

Identified two stationary flow regions: subsonic superfluid flow and supersonic dissipative flow.
Observed Anderson localization in the supersonic regime.
Derived the interaction-dependent localization length.
Explained the vanishing of supersonic flow for large disordered samples.

Conclusions:

Interaction effects in disordered BECs create complex flow behaviors.
Anderson localization is a key feature of supersonic flow in these systems.
The extent of the disordered region significantly influences the observed phenomena.