College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China
Abstract:
We introduce a new kind of four-mode continuous variable entangledstate in Fock space. The completeness relation and the partlynonorthonormal property of such a state are proven. The scheme togenerate this state is presented by combining a symmetricalbeamsplitter, a parametric down-conversion and a polarizer. Aftermaking a single-mode quadrature amplitude measurement, the remainingthree modes are kept in entanglement. And its applications are alsodiscussed.