Cross time-bin photonic entanglement for quantum key distribution

  title={Cross time-bin photonic entanglement for quantum key distribution},
  author={A. Martin and Florian Kaiser and Aline Vernier and Alexios Beveratos and Valerio Scarani and S{\'e}bastien Tanzilli},
  journal={Physical Review A},
We report a fully fibered source emitting cross time-bin-entangled photons at 1540 nm from type-II spontaneous parametric down-conversion. Compared to standard time-bin-entanglement realizations, the preparation interferometer requires no phase stabilization, simplifying its implementation in quantum key distribution experiments. Bell-type tests of such a cross time-bin state are performed in the Franson configuration and lead to two-photon interference raw visibilities greater than 95%, which… 

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