Quantum key distribution for d-level systems with generalized Bell states

Details Quantum key distribution for d-level systems with generalized Bell states Quantum key distribution for d-level systems with generalized Bell states

2001-11-18

arxiv.org/abs/quant-ph/0111091v3

Phys. Rev. A 65, 052331 (2002)

Physics

Quantum Physics

8 pages, 3 figures, REVTEX, references added, extensive revision, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.65.052331

Using the generalized Bell states and controlled not gates, we introduce an enatanglement-based quantum key distribution (QKD) of d-level states (qudits). In case of eavesdropping, Eve's information gain is zero and a quantum error rate of (d-1)/d is introduced in Bob's received qudits, so that for large d, comparison of only a tiny fraction of received qudits with the sent ones can detect the presence of Eve.

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