Double entanglement and quantum cryptography

Details Double entanglement and quantum cryptography Double entanglement and quantum cryptography

2001-07-23

arxiv.org/abs/quant-ph/0107118v1

Eur. Phys. Journ. D. 21 (2002) 109.

Physics

Quantum Physics

Scientific paper

10.1140/epjd/e2002-00172-5

We propose a quantum transmission based on bi-photons which are doubly-entangled both in polarisation and phase. This scheme finds a natural application in quantum cryptography, where we show that an eventual eavesdropper is bound to introduce a larger error on the quantum communication than for a single entangled bi-photon communication, when steeling the same information.

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