Triple Quantum Correlations from an Above-Threshold Optical Parametric Oscillator
K. N. Cassemiro, Alessandro S. Villar, M. Martinelli, P. Nussenzveig · International Conference on Quantum Information · 2008
We measured triple quantum correlations between the bright beams in an optical parametric oscillator, operating above threshold. Owing to extra noise in the system, still unaccounted for, tripartite entanglement is yet to be demonstrated.