Volume 131, Number 1, July 2020
|Number of page(s)||6|
|Published online||29 July 2020|
Genuine quadripartite quantum steering generated by an optical parametric oscillation cascaded with a sum-frequency process
1 Key Laboratory of Optical Field Manipulation of Zhejiang Province, Department of Physics, Zhejiang Sci-Tech University - Hangzhou 310018, China
2 Shanghai Institute of Space Power Sources, Shanghai Academy of Spaceflight Technology No. 2965 Dongchuan Road, Minhang District, Shanghai, China
3 School of Physics and Electronic Engineering, Guangzhou University - Guangzhou 510006, China
Received: 1 May 2020
Accepted: 30 June 2020
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.
PACS: 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.) / 42.65.Yj – Optical parametric oscillators and amplifiers
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