Quantum theory of optical multistability in a two-photon three-level Λ-configuration medium
Zhi‐Cheng Wang, Wenan Guo, Songyi Zheng
An effective Hamiltonian for the two-photon two-level model is derived form the microscopic Hamiltonian of a three-level atom in a \ensuremath{\Lambda} configuration, interacting through two-photon transitions with a light field. The effective Hamiltonian includes a term describing the optical Stark shift. With this effective Hamiltonian, we study the steady-state equation and the squeezing spectrum for a cavity-field mode interacting with an ensemble of three-level ``\ensuremath{\Lambda}-configuration'' atoms by a two-photon transition. It is shown that significant changes in the transmission characteristics and the squeezing spectrum for the output field result from the inclusion of the Stark shift.
Physical Review A•Dec 1, 1992•3 citations