Double entanglement and quantum cryptography
arXiv:quant-ph/0107118 · doi:10.1140/epjd/e2002-00172-5
Abstract
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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