Experimental quantum key distribution based on a Bell test
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.
- Publication:
-
Physical Review A
- Pub Date:
- August 2008
- DOI:
- 10.1103/PhysRevA.78.020301
- arXiv:
- arXiv:0805.3629
- Bibcode:
- 2008PhRvA..78b0301L
- Keywords:
-
- 03.67.Dd;
- 03.65.Ud;
- Quantum cryptography;
- Entanglement and quantum nonlocality;
- Quantum Physics
- E-Print:
- 5 pages ReVTeX, 3 figures