Publications by the Laboratory of Theoretical Physics

Coupled-mode theory for Bose–Einstein condensates with time dependent atomic scattering length, F. Kh. Abdullaev, S. Jesni, and M. R. Wahiddin, Phys. Lett. A 345, 237 (2005).   [PDF-file (196 kB)] Abstract: We study nonlinear tunnelling and localization phenomena in Bose–Einstein condensate in a double-well potential, using a coupled-mode theory. We consider the effects induced by the damping and an atomic scattering length oscillating in time in a double-well potential. The existence of synchronous solutions in a running phase mode and resonances in macroscopic quantum tunnelling for such system are investigated. The switching between macroscopic quantum tunnelling and quantum self-trapped regimes induced by periodic modulations of the scattering length is also studied. The papers have Copyright © by the corresponding publishers. The papers may be downloaded for personal use only. Any other use requires prior permission of the author and the publisher.