Quantum Key Distribution with vacuum--one-photon entangled states

Details Quantum Key Distribution with vacuum--one-photon entangled states Quantum Key Distribution with vacuum--one-photon entangled states

2005-04-20

arxiv.org/abs/quant-ph/0504150v2

Phys. Rev. A 71, 064303 (2005)

Physics

Quantum Physics

To appear in Physical Review A

Scientific paper

We present a scheme to realize a quantum key distribution using vacuum-one photon entangled states created both from Alice and Bob. The protocol consists in an exchange of spatial modes between Alice and Bob and in a recombination which allows one of them to reconstruct the bit encoded by the counterpart in the phase of the entangled state. The security of the scheme is analyzed against some simple kind of attack. The model is shown to reach higher efficiency with respect to prior schemes using phase encoding methods.

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