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Proceedings Paper

Controlling EPR correlations via a coherent signal injection
Author(s): Jingyan Li; Qingping Hu; Yanqin Ren; Qing Ye
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Paper Abstract

In this paper, a cascaded optical parametric system combing degenerate optical parametric oscillation (OPO) and second harmonic generation (SHG) is investigated. By using the positive-P representation and standard input-output relations, and using quantum trajectory numerical simulation, we can analyse the quantum correlation behavior of the system above or below threshold. By injecting a small coherent signal in the lowest field mode, the threshold of the system can be changed. More importantly, the symmetry property of the EPR steering can also easily be controlled. Without signal injection, the EPR steering only occurs between two higher field modes below threshold, but it will disappear with injection. For EPR steering of other two pair bipartition is formerly not existent, while they occur with injection. Meanwhile, the steering property of the lowest mode and the highest mode becomes asymmetric by changing the value of the signal. The injection of the coherent signal allows for a simple means of control over the EPR steering properties of the system.

Paper Details

Date Published: 20 December 2019
PDF: 8 pages
Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112092D (20 December 2019); doi: 10.1117/12.2548264
Show Author Affiliations
Jingyan Li, Wuhan Textile Univ. (China)
Qingping Hu, Wuhan Textile Univ. (China)
Yanqin Ren, Wuhan Textile Univ. (China)
Qing Ye, Wuhan Textile Univ. (China)

Published in SPIE Proceedings Vol. 11209:
Eleventh International Conference on Information Optics and Photonics (CIOP 2019)
Hannan Wang, Editor(s)

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