Resource reduction for simultaneous generation of two types of continuous variable nonclassical states

• 作者: Long Tian Shao-Ping Shi Yu-Hang Tian Ya-Jun Wang Yao-Hui Zheng Kun-Chi Peng
• 来源期刊: 物理学前沿
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: Quantum Computation & Quantum Information;Atomic,Molecular & Optical Physics
• 页码范围: 2-7
• 页数: 6页
• 语种: 英文

摘要

We demonstrate experimentally the simultaneous generation and detection of two types of continuous variable nonclassical states from one type-0 phase-matching optical parametric amplification(OPA)and subsequent two ring filter cavities(RFCs).The output field of the OPA includes the basebandω0 and sideband modes ω0±nωf subjects to the cavity resonance condition,which are separated by two cascaded RFCs.The first RFC resonates with half the pump wavelength ω0 and the transmitted baseband component is a squeezed state.The reflected fields of the first RFC,including the sideband modes ω0±ωf,are separated by the second RFC,construct Einstein-Podolsky-Rosen entangled state.All freedoms,including the filter cavities for sideband separation and relative phases for the measure-ments of these sidebands,are actively stabilized.The noise variance of squeezed states is 10.2 dB below the shot noise limit(SNL),the correlation variances of both quadrature amplitude-sum and quadrature phase-difference for the entanglement state are 10.0 dB below the corresponding SNL.