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

【作者】 李娟； Cai Chun-Xiao； Ma Long； Sun Heng-Xin； Liu Kui； Gao Jiang-Rui；

【Author】 Li Juan;Cai Chun-Xiao;Ma Long;Sun Heng-Xin;Liu Kui;Gao Jiang-Rui;State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University;Collaborative Innovation Center of Extreme Optics,Shanxi University;

【机构】 山西大学； State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University； Collaborative Innovation Center of Extreme Optics,Shanxi University；

【摘要】 As a highly entangled quantum network, the multipartite entanglement has the potential for greater information capacity and use in measurement-based quantum computation. We firstly produce CV hyperentanglement with polarization and orbital angular momentum in a single optical parametric amplifier(OPA), which has a promising application in parallel processing of continuous-variable multi-chmannel quantum information and multiparameters quantum metrology. Furthermore, the pump-profile dependence of the entanglement of this state is explored. Compared with fundamental mode pumping, an enhancement of approximately 35% is achieved using the suitable pump-profile mode. Then, by the transformation of quantum state, we generate a continuous-variable quadripartite "square" cluster state of multiplexing orthogonal spatial modes. Such spatial cluster states may contribute to future schemes in spatial quantum information processing.更多还原

【Abstract】 As a highly entangled quantum network, the multipartite entanglement has the potential for greater information capacity and use in measurement-based quantum computation. We firstly produce CV hyperentanglement with polarization and orbital angular momentum in a single optical parametric amplifier(OPA), which has a promising application in parallel processing of continuous-variable multi-chmannel quantum information and multiparameters quantum metrology. Furthermore, the pump-profile dependence of the entanglement of this state is explored. Compared with fundamental mode pumping, an enhancement of approximately 35% is achieved using the suitable pump-profile mode. Then, by the transformation of quantum state, we generate a continuous-variable quadripartite "square" cluster state of multiplexing orthogonal spatial modes. Such spatial cluster states may contribute to future schemes in spatial quantum information processing.更多还原