Experimental quantum key distribution based on a Bell test

2008/05/31 by Alexander Ling, Matthew P. Peloso, Ivan Marcikic +5
Computer Science · Physics and Astronomy · #Orbital Angular Momentum in Optics #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physreva.78.020301

published as Physical Review A 78, 020301 (R) (2008) · 5 pages ReVTeX, 3 figures; version v2 with updated references and minor corrections, author spelling fixed

arxiv created 2008/06/06 · openalex publication_date 2008/08/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report on a complete free-space field implementation of a modified Ekert protocol for quantum key distribution using entangled photon pairs. For each photon pair we perform a random choice between key generation and a Bell inequality. The amount of violation is used to determine the possible knowledge of an eavesdropper to ensure security of the distributed final key.

Citations

• High-efficiency entangled photon pair collection in type-II parametric fluorescence
• Device-Independent Security of Quantum Cryptography against Collective Attacks
• Quantum Cryptography with Entangled Photons
• New High-Intensity Source of Polarization-Entangled Photon Pairs
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• On the Problem of Hidden Variables in Quantum Mechanics
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• Efficient quantum key distribution secure against no-signalling eavesdroppers
• Conjugate coding
• Distributed Entanglement