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Quadripartite entanglement from cascaded χ2 nonlinear interactions

✍ Scribed by J.F. Wang; J.S. Zhao; H.Y. Leng; X.Q. Yu; Z.D. Xie; Y.L. Yin; P. Xu; S.N. Zhu

Book ID: 104074156
Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 325 KB
Volume: 282
Category: Article
ISSN: 0030-4018
DOI: 10.1016/j.optcom.2009.06.026

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✦ Synopsis

We theoretically analyze the generation of quadripartite continuous-variable entanglement, with different frequency, by cascaded nonlinear process in a quadruply resonant optical cavity. This process is realized by one optical parametric down-conversion operated below threshold cascaded by two sumfrequency generations in a quasiperiodic optical supperlattice. It shows that the signal, idler and two sum frequency modes are entangled according to the sufficient inseparability criterion proposed by van Loock and Furusawa. The quantum correlation spectra among these four modes versus normalized analysis frequency and nonlinear coupling coefficients are discussed as well in detail.

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