Three-colour entanglement generated by an injection-seeded nondegenerate optical parametric oscillator |
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Authors: | YB Yu M Xiao SN Zhu |
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Institution: | a School of Sciences, Ningbo University of Technology, Ningbo 315211, China b Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA c National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China |
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Abstract: | Three-colour continuous-variable (CV) entanglement can be directly generated by an injection-seeded nondegenerate optical parametric oscillator (INOPO). The quantum correlations among the pump, signal, and idler beams are calculated and discussed by applying sufficient inseparability criteria for CV entanglement. The results clearly show that strong three-colour CV entanglement can be produced by operating the pump above the oscillation threshold. The INOPO is easier to realize experimentally and more steady in comparison to that without an injected signal since the injected signal can increase the nonlinear conversion efficiency and the stability, as well as allow a large degree of tunability. This scheme can be very useful for the applications in quantum communication and computation networks. |
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Keywords: | Quantum entanglement Quantum information Nondegenerate optical parametric oscillator |
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