Which optical processes are suitable to make probabilistic single photon sources for quantum cryptography?

Details Which optical processes are suitable to make probabilistic single photon sources for quantum cryptography? Which optical processes are suitable to make probabilistic single photon sources for quantum cryptography?

2009-09-02

arxiv.org/abs/0909.0409v1

Physics

Quantum Physics

7 Pages, Presented in an international conference Photonics and Optics 2008 at San Diego, USA, 10-14 Aug 2008

Scientific paper

Single photon sources to be used in quantum cryptography must show higher order antibunching (HOA). HOA is reported by us in several many wave mixing processes. In the present work we have investigated the possibility of observing HOA in multiwave mixing processes in general. The generalized Hamiltonian is solved for several particular cases in Heisenberg picture and possibility of observing HOA is investigated with the help of criterion of Pathak and Garcia. Several particular cases of the generalized Hamiltonian are solved with the help of short time approximation technique and HOA is reported for pump modes of different multiwave mixing processes. It is also found that HOA can not be observed for the signal and stokes modes in of the cases studied here.

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