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Center for Astrophysics Research and Technologies Seminar Series Information


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Rotating trapped Bose-Einstein condensates

Friday March 2, 2018
3:30 pm

 Presenter:  Alexander Fetter, Stanford
 Series:  Physics and Astronomy Colloquium
 Abstract:  After reviewing the basic physics of Bose-Einstein condensation, I discuss the non-linear Gross-Pitaevskii equation which provides a good description of a trapped dilute condensate. Here the interest is the rotational properties of the condensate, especially the role of quantized vortex lines. For slow rotations, only a few vortices appear, but as the angular velocity increases, the vortices form a triangular lattice that is analogous to the Abrikosov vortex lattices in type-II superconductors. Eventually the system enters the lowest Landau level regime where the mean interaction energy per particle is small compared to the energy gap separating the first and second Landau levels. For very fast rotations, theorists predict a quantum phase transition to a non-superfluid highly correlated state analogous to those seen in the quantum Hall regime for two-dimensional electrons in a strong magnetic field.
 Host:  Kevin Cahill
 File:  https://youtu.be/kzTlIyWLMP0
 Location:  Room 125, Dane Smith Hall

Refreshments will be available before the colloquium, at 03:15 pm, in in the lobby of Dane Smith Hall.

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