Generation of a continuous-variable quadripartite cluster state multiplexed in the spatial domain

• DOI: 10.1364/prj.6.000479
• Publication Date: 2018-04-26T19:03:26Z
• Authors: Chunxiao Cai; Long Ma; Juan Li; Hui Guo; Kui Liu; Hengxin Sun; Rongguo Yang; Jiangrui Gao
• Keywords: Quantum Metrology

As a highly entangled quantum network, the cluster state has potential for greater information capacity and use in measurement-based computation. Here, we report generating continuous-variable quadripartite “square” of multiplexing orthogonal spatial modes single optical parametric amplifier (OPA), further improve quality entanglement by optimizing pump profile. We produce multimode two first-order Hermite–Gauss within one beam OPA transform it into phase correction. Furthermore, pump-profile dependence this is explored. Compared with fundamental mode pumping, an enhancement approximately 33% achieved using suitable mode. Our approach potentially scalable to domain. Such states may contribute future schemes processing.