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

Abstract

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.

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

References in corpus (4)

• Quantum Cryptography
• Security of quantum key distribution using d-level systems
• Entanglement Swapping of Generalized Cat States and Secret Sharing
• From Classical State-Swapping to Quantum Teleportation

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