# Effect of an incoherent pump on two-mode entanglement in optical parametric generation

@article{Vintskevich2019EffectOA, title={Effect of an incoherent pump on two-mode entanglement in optical parametric generation}, author={Stephen Vintskevich and Dmitry A. Grigoriev and Sergey N. Filippov}, journal={Physical Review A}, year={2019} }

Pumping a nonlinear crystal by an intense radiation results in the optical parametric generation of photons in two modes (the signal and the idler). The quantized electromagnetic field in these modes is described by a continuous-variable quantum state, which is entangled if the pump is a coherent state produced by a laser. The signal and the idler modes remain populated by photons even if the pump becomes incoherent (dephased by a medium, superposed with a thermal state, or produced by an…

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