Quantum cryptography using partially entangled states

Details Quantum cryptography using partially entangled states Quantum cryptography using partially entangled states

2008-07-14

arxiv.org/abs/0807.2234v2

Opt. Commun. 283, 184 (2010)

Physics

Quantum Physics

4 pages, 1 figure, RevTex 4; v2: published version

Scientific paper

We show that non-maximally entangled states can be used to build a quantum key distribution (QKD) scheme whose security and key rate transmission is nearly equivalent to those of standard QKD protocols. These aspects can be controlled by using the new free parameter in the present scheme, namely, the degree of partial entanglement. Furthermore, we discuss how to build a controlled QKD scheme, also based on partially entangled states, where a third party can decide whether or not Alice and Bob are allowed to share a key.

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