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 armplification(OPA)and subsequent two ring filter cavities(RFCs).The output field of the OPA includes the baseband wo 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 wo and the transmitted baseband component is a squeezed state.The relcted fields of the first RFC,including the sideband modes ω0±wf,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 diference for the entanglement state are 10.0 dB below the corresponding SNL.
基金
This work was supported by the National Natural Science Foundation of China(Grant Nos.11654002,11804207,11874250,and 11804206)
the National Key Research and Development Program of China(Grant No.2016YFA0301401)
the Program for Sanjin Scholar of Shanxi Province,the Key Research and Development Program of Shanxi(Grant No.201903D111001)
the Fund for Shanxi 1331 Project Key Subjects Construction,the Program for Outstanding Innovative Teams of Higher Learning In-stitutions of Shanxi,and the Natural Science Foundation of Shanxi Province(Grant No.201801D221006).
