|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Spin gradient demagnetization cooling of ultracold atoms | | Patrick Medley
; David M. Weld
; Hirokazu Miyake
; David E. Pritchard
; Wolfgang Ketterle
; | | Date: |
24 Jun 2010 | | Abstract: | Attainment of lower temperatures has frequently enabled discoveries of new
physical phenomena, from superconductivity to Bose-Einstein condensation. Here
we describe and demonstrate a cooling method, spin gradient demagnetization,
which has several novel features: It operates directly in the spin degree of
freedom, it can be applied to atoms in an optical lattice, and it is able to
reach positive and negative spin temperatures of $pm$50 picokelvin, the lowest
temperatures which have been achieved in any system. The cooling method
consists of applying a time-varying magnetic field gradient to a spin mixture
of ultracold atoms. The spin system can also be used to cool other degrees of
freedom, and we have used this coupling to reduce the temperature of an
apparently equilibrated sample of rubidium atoms in an optical lattice to 350
picokelvin. These results open a realistic path to the observation of magnetic
quantum phase transitions in optical lattices. | | Source: | arXiv, 1006.4674 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER