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