Nonclassical properties and entanglement of non-Gaussian entangled states generated via multiple-photon subtraction on two-mode squeezed coherent states

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• 作者：Li-Li Hou ; Xian-Feng Chen ; Shuai Wang ; ^{wshslxy@cczu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Non-Gaussian entangled states ; Photon subtraction ; Nonclassical properties
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：126
• 期：24
• 页码：5102-5108
• 全文大小：1460 K

文摘

We investigate how the photon-subtraction operation affects the quantum optical nonclassicalities and the entanglement of photon-subtracted two-mode squeezed coherent states (PS-TMSCS). For such non-Gaussian entangled states, the normalization factor and Mandel Q parameter, as well as, the quantity of the Hillery–Zubairy inequality are analytically derived, and they are all periodic functions of the compound phase χ = ϕ₁ + ϕ₂ − θ involved in the TMSCS. We show that the fields in such states exhibit remarkable sub-Poissonian photon statistics, especially at the optimal phase χ = 0. The Wigner function of the PS-TMSCS is modulated by a factor which is related to two-variable Hermite polynomials. And the shape of the Wigner function is phase-sensitive, which is different from that of the TMSCS. As characterized by the Hillery–Zubairy entanglement criterion, we show that the quantity of Hillery–Zubairy E gets more negative not only for a larger value of r but also for greater values of photon subtraction numbers (m, n) at the optimal compound phase = 0.