Entangled Entropy of a Two-photon System withContinuous Frequency Systems
Kaige Wang · Acta Sinica Quantum Optica · 2004
The way to quantify entanglement for a continuous variable bipartite state is discussed. The entangled entropy for a two-photon state with Gaussian continuous spectrum is calculated. The numerical simulation shows that the entanglement entropy is related to the ration of two-photon entangled state bandwidths between the pump and the down-coverted beam, and the result is consistent with the physics reality.