Generation of bright two-mode entangled light in four-level tripod atomic system

Jiandong Ding, Bang‐Pin Hou

Hongrong Li, Li‐Gang Wang, Gao-xiang Li +2 more

Xinyu Zhao, Yonghong Ma, Ling Zhou

Yihong Qi, Fengxue Zhou, Ting Huang +2 more

We study the generation of weak-light spatial vector solitons in a cold tripod-type atomic system. The condition of generating spatial vector solitons is discussed by analyzing the linear and nonlinear properties of the system. Due to the balance between the enhanced self-phase and cross-phase modulation of the Kerr nonlinearity and the diffraction effect, two orthogonal polarization components of the weak-light probe field can form various spatial vector solitons in the atomic system, such as bright-bright vector solitons and dark-dark vector solitons. We also demonstrate the possibility of generating Manakov spatial vector solitons in this atomic system.

Yonghong Ma, Xinyu Zhao, Ling Zhou

We discuss the generation and evolution of entanglement in a four-level laser with a subthreshold nondegenerate parametric oscillator. The entanglement properties of the two-mode light generated by this scheme is studied. We show that the light produced by the present system is strongly entangled with time evolution. Especially, with the help of the parametric oscillator, the high intensity of the entangled light between the two-mode cavity can be achieved.

Vladan Vuletić