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Updated: Jul 2, 2026
11:21
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
d-wave collapse and explosion of a dipolar bose-einstein condensate
15. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
Physical Review Letters
|September 4, 2008
Summary
We observed a d-wave symmetric explosion in a dipolar condensate of 52Cr atoms when contact interactions weakened. This collapse led to a sharp atom number decrease and the formation of two vortex rings.
Area of Science:
- Atomic physics
- Quantum condensates
- Ultracold atoms
Background:
- Dipolar condensates exhibit unique quantum phenomena due to long-range interactions.
- Tuning the s-wave scattering length controls contact interactions in ultracold atomic gases.
Purpose of the Study:
- Investigate the collapse dynamics of a 52Cr dipolar condensate.
- Analyze the effects of reducing s-wave scattering length below a critical value.
- Compare experimental observations with numerical simulations.
Main Methods:
- Experimental manipulation of a 52Cr dipolar condensate.
- Controlled reduction of the s-wave scattering length.
- Numerical simulation using the 3D Gross-Pitaevskii equation.
Main Results:
- Observed anisotropic, d-wave symmetric explosion of the condensate.
- Abrupt decrease in atom number during collapse.
- Formation of two vortex rings with opposite circulations.
Conclusions:
- Experimental results show good agreement with numerical simulations.
- The collapse dynamics are accurately modeled by including contact, dipolar interactions, and three-body losses.
- Collapse induces complex vortex ring formation in dipolar condensates.
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