Enhancement of entanglement in the nonlinear optical coupler by homodyne-mediated feedback
Sha‐Sha Ke, Guiping Cheng, Lihui Zhang, Gao‐xiang Li · Journal of Physics B Atomic Molecular and Optical Physics · 2007
The enhancement of the intracavity entanglement of a nonlinear coupler via homodyne-mediated quantum feedback is investigated. It is found that the feedback can effectively enhance the squeezing, entanglement and purity of a two-mode field in the nonlinear coupler by appropriately choosing the quadrature angle at which the quantum feedback is introduced.