Europhysics Letters (EPL)

Genuine quadripartite quantum steering generated by an optical parametric oscillation cascaded with a sum-frequency process

Shiuan-Ni Liang, Yi Liu, Youbin Yu, Jie Lan, Xiao Bin He, Kangxian Guo

Published Jul 31, 2020• 14 citations

Abstract

Quantum steering is the essential resource for quantum information processing. In this letter, a scheme is proposed to generate genuine quadripartite Einstein-Podolsky-Rosen (EPR) steering by an optical parametric oscillation cascaded with a sum-frequency process. Idler beam is generated by a difference frequency generation process between pump and injected signal in an optical superlattice. Then, a sum-frequency beam is produced by the cascaded sum-frequency process between pump and idler beams in the same optical superlattice by the quasi-phase-matching technique. The genuine quadripartite EPR steering among pump, signal, idler, and sum-frequency beams is confirmed in this scheme by applying a criteria for genuine multipartite EPR steering. The variation properties of the EPR steering with pump and nonlinear coupling coefficients are also discussed.

DOI: 10.1209/0295-5075/131/10001

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