Multipartite continuous-variable entanglement in nondegenerate optical parametric amplification system
Chao Zhao, Wei Han Tan, Jiang Rong Xu, Fan Ge · Journal of the Optical Society of America B · 2011
A nondegenerate optical parametric amplification (NOPA) system with N modes can be resolved into combinations of N degenerate parametric amplification (DOPA j, j=1–N) systems. Based on the quantum fluctuations, we extend the method of V1 criterion for bipartite entanglement to multipartite entanglement. The entanglement characteristics for N=2–5 are investigated, the variance V1 decreases as a function of interaction time t, the great N brings a very small variance V1.