| DATE: |
2011-12-27 15:30 - 16:30 |
| PLACE: |
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| TITLE: |
Radiation from accelerated impurities in a Bose–Einstein condensate |
| CONTACT: |
Toshihiko Sasaki,tsasaki-AT-post.kek.jp |
| SPEAKER: |
Dr. Jun Suzuki ((Graduate School of Information Systems,the University of Electro-Communications) |
| LANGUAGE: |
Japanese |
| URL: |
http://research.kek.jp/group/www-theory/schedule.html |
| ABSTRACT: |
We investigate radiation spectra arising from accelerated point-like impurities in the homogeneous Bose– Einstein condensate. A general formula for the radiation spectrum is obtained in the integral form as a function of given impurity trajectory within the Bogoliubov approximation. The Planckian spectrum is obtained for a special accelerated motion, which is shown to be unphysical. Non-Planckian spectrum is found in the case of a uniformly accelerated impurity. We compare our result with similar settings discussed in other quantum systems.
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