Theory Seminar

KEK 素粒子原子核研究所・理論セミナー

TITLE:
Radiation from accelerated impurities in a Bose–Einstein condensate
(Japanese)
SPEAKER:
鈴木 淳(Jun Suzuki)
(Graduate School of Information Systems,the University of Electro-Communications)
DATE:
December 27 (Tue.) 15:30-16:30
PLACE:
Kenkyu Honkan 3F RM 322

(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.