A scheme is proposed to generate genuine tripartite Einstein-Podolsky-Rosen(EPR)steering in cascaded nonlinear process of the fourth-harmonic generation.The second-harmonic is generated by the first double-frequency p...A scheme is proposed to generate genuine tripartite Einstein-Podolsky-Rosen(EPR)steering in cascaded nonlinear process of the fourth-harmonic generation.The second-harmonic is generated by the first double-frequency process in an optical superlattice.Then,the fourth-harmonic is produced by the second cascaded double-frequency process through quasi-phase-matching technique in the same optical superlattice.The genuine tripartite EPR steering among the pump,the second-harmonic,and the fourth-harmonic beams can be obtained by this cascaded nonlinear process according to a criterion for genuine multipartite quantum steering.The quantum steering properties are discussed by adjusting the parameters related to the cascaded nonlinear system.The present research provides a reference scheme and data for obtaining good multipartite EPR steering in experiment and can advance the applications of quantum steering in the quantum information processing.展开更多
The generation of enhanced three-mode continuously variable(CV)entanglement via difference-frequency amplification in an optical cavity above the threshold is investigated.The quantum entanglement characteristics amon...The generation of enhanced three-mode continuously variable(CV)entanglement via difference-frequency amplification in an optical cavity above the threshold is investigated.The quantum entanglement characteristics among the pump,signal,and idler beams are demonstrated by applying a sufficient inseparability criterion for CV entanglement proposed by van Loock and Furusawa.Bright three-mode CV entanglement with different frequencies can be generated in this simple system when the optical cavity operates above its threshold,and the best three-mode CV entanglement can be obtained when the pump threshold parameter is modulated at aboutσ=1.3.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61975184,91636108,and 61775043)the Natural Science Foundation of Zhejiang Province,China(Grant No.LY18A040007)+1 种基金the Science Foundation of Zhejiang Sci-Tech University(Grant Nos.19062151-Y and 18062145-Y)the Open Foundation of the Key Laboratory of Optical Field Manipulation of Zhejiang Province,China(Grant No.ZJOFM-2019-002).
文摘A scheme is proposed to generate genuine tripartite Einstein-Podolsky-Rosen(EPR)steering in cascaded nonlinear process of the fourth-harmonic generation.The second-harmonic is generated by the first double-frequency process in an optical superlattice.Then,the fourth-harmonic is produced by the second cascaded double-frequency process through quasi-phase-matching technique in the same optical superlattice.The genuine tripartite EPR steering among the pump,the second-harmonic,and the fourth-harmonic beams can be obtained by this cascaded nonlinear process according to a criterion for genuine multipartite quantum steering.The quantum steering properties are discussed by adjusting the parameters related to the cascaded nonlinear system.The present research provides a reference scheme and data for obtaining good multipartite EPR steering in experiment and can advance the applications of quantum steering in the quantum information processing.
基金by the National Natural Science Foundations of China(no.10804059)Zhejiang Provincial Natural Science Foun-dation(no.Y6090488),Ningbo Natural Science Foundation(nos 2008A610004 and 2008A610006)the K C Wong Education Foundation(Hong Kong).
文摘The generation of enhanced three-mode continuously variable(CV)entanglement via difference-frequency amplification in an optical cavity above the threshold is investigated.The quantum entanglement characteristics among the pump,signal,and idler beams are demonstrated by applying a sufficient inseparability criterion for CV entanglement proposed by van Loock and Furusawa.Bright three-mode CV entanglement with different frequencies can be generated in this simple system when the optical cavity operates above its threshold,and the best three-mode CV entanglement can be obtained when the pump threshold parameter is modulated at aboutσ=1.3.
