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Title: 2-D Bose-Einstein condensates (BECs); Berezinskii, Kosterlitz and Thouless (BKT) transition
Description: A gas of atoms arranged in a single, flat layer ordinarily has 'thermal' behavior (left) in which the atoms act as individual entities. At lowered temperatures, the gas transforms into a 'quasi-condensate' (middle) consisting of little islands (schematically represented as colored blobs) that fluctuate in time; within each island atoms act as a single coordinated entity. At lower temperatures still, the gas enters the superfluid 'BKT' phase (right): the islands start to coalesce and atoms can flow frictionlessly within the merged area.

*Physics
Subjects (names):
Topics/Categories: Physics--Atomic and Molecular Physics
Type: Graphic/illustration
Source: National Institute of Standards and Technology
Credit Line as it should
appear in print:
Credit: Kristian Helmerson, JQI
AV Number: 09PHY005
Date Created: 2009
Date Entered: 3/24/2009

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