Search

Multipartite quantum steering correlation among Raman scattering beams generated by the enhanced Raman scattering process is investigated. In this single-pass nonlinear process, without an optical resonant cavity, Raman scattering beams of the same order can be significantly enhanced through differential amplification of pump, resulting in enhanced Raman scattering beams. Based on the multipartite quantum steering correlation criterion, tripartite quantum steering and five-partite quantum steering can be obtained by the first-order Raman scattering and the second-order Raman scattering, respectively. This scheme of the generation of multipartite quantum steering enriches the types of quantum manipulation and can be applied to quantum information work such as quantum networks. [ABSTRACT FROM AUTHOR]

Einstein–Podolsky–Rosen (EPR) steering is a quantum effect based on quantum entanglement and it is the key resource for building quantum networks because of its useful properties. Based on the criterion for genuine multipartite EPR steering, the genuine quadripartite EPR steering is confirmed and it can be generated by a spontaneous parametric down-conversion cascaded process with two sum-frequency generations in an optical superlattice. This occurs either below the oscillation threshold and without oscillation threshold. The influence of the parameters of cascaded nonlinear process on the quadripartite EPR steering among signal, idler, and two sum-frequency beams are also discussed. Choosing appropriate nonlinear parameters can achieve good quadripartite quantum steering. This scheme of the generation of genuine quadripartite EPR steering has potential applications in quantum communication and computing. [ABSTRACT FROM AUTHOR]