Four-mode continuous-variables entangled state: generation from beam splitter, a parametric down-conversion and a polarizer
Kuang Mai-Hua, 马善钧, Dongmei Liu, Wang Shu-Jing · Chinese Physics B · 2009
We introduce a new kind of four-mode continuous variable entangled state in Fock space. The completeness relation and the partly nonorthonormal property of such a state are proven. The scheme to generate this state is presented by combining a symmetrical beamsplitter, a parametric down-conversion and a polarizer. After making a single-mode quadrature amplitude measurement, the remaining three modes are kept in entanglement. And its applications are also discussed.