噪声存在下光子减态与非定域性增强
Photon subtracted states and enhancement of nonlocality in the presence of noise
摘要：
我们讨论了存在耗散和噪声的连续变量系统的非局部性。考虑了三种非定域性检验，分别基于位移宇称、场求积和赝自旋算符的测量。研究了孪生光束的非局域性，以及通过非确定性光子相减得到的非高斯光束的非局域性。我们的研究结果表明：噪声对双光束的非局域性有影响，但不破坏双光束的非局域性; 2光子相减增强了噪声对双光束非局域性的影响，特别是在低能区。
英文摘要：
We address nonlocality of continuous variable systems in the presence of dissipation and noise. Three nonlocality tests have been considered, based on the measurement of displaced-parity, field-quadrature and pseudospin-operator, respectively. Nonlocality of twin beam has been investigated, as well as that of its non-Gaussian counterparts obtained by inconclusive subtraction of photons. Our results indicate that: i) nonlocality of twin beam is degraded but not destroyed by noise; ii) photon subtraction enhances nonlocality in the presence of noise, especially in the low-energy regime.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
