Generation of two-photon States with an arbitrary degree of entanglement via nonlinear crystal superlattices.

@article{URen2006GenerationOT,
  title={Generation of two-photon States with an arbitrary degree of entanglement via nonlinear crystal superlattices.},
  author={Alfred B. U'Ren and Reinhard K. Erdmann and Manuel de la Cruz-Gutierrez and Ian A. Walmsley},
  journal={Physical review letters},
  year={2006},
  volume={97 22},
  pages={223602}
}
We demonstrate a general method of engineering the joint quantum state of photon pairs produced in spontaneous parametric down-conversion. The method makes use of a superlattice structure of nonlinear and linear materials, in conjunction with a broadband pump, to manipulate the group delays of the signal and idler photons relative to the pump pulse, and realizes photon pairs described by a joint spectral amplitude with arbitrary degree of entanglement. This method of group-delay engineering has… CONTINUE READING

Topic