Communications in Theoretical Physics
Berry's Phases of the Alkali Atom in a Slowly Changing Strong Magnetic Field and Non-Adiabatic Transition
Chang-Pu Sun, Zhang Linzhi, Qing Xiao
Abstract
In this paper the high-order adiabatic approximation (HOAA) method is formulated in a new form so that the calculation is greatly simplified. Using this improved HOAA method, we study the Berry phase effects of the Alkali atom in a slowly-changing strong magnetic field and also the non-adiabatic transitions between the instantaneous angular momentum states. The possible observability is also pointed out.