Coupled-mode theory for Bose–Einstein condensates with time dependent atomic scattering length

• Main Authors: Abdullaev, Fatkhulla Kh., Shamsul Shaari, Jesni, Wahiddin, Mohamed Ridza
• Format: Article
• Language: English
• Published: Elsevier 2005
• Subjects: QC Physics
• Online Access: http://irep.iium.edu.my/14533/1/coupled_mode_theory.pdf; http://irep.iium.edu.my/14533/; http://dx.doi.org/10.1016/j.physleta.2005.07.011
• Institution: Universiti Islam Antarabangsa Malaysia

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.