Quantum Key Distribution with Bright Entangled Beams
Abstract
We suggest a quantum cryptographic scheme using continuous EPR-like correlations of bright optical beams. For binary key encoding, the continuous information is discretized in a novel way by associating a respective measurement, amplitude, or phase, with a bit value ``1'' or ``0.'' The secure key distribution is guaranteed by the quantum correlations. No predetermined information is sent through the quantum channel contributing to the security of the system.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2002
- DOI:
- 10.1103/PhysRevLett.88.167902
- arXiv:
- arXiv:quant-ph/0109009
- Bibcode:
- 2002PhRvL..88p7902S
- Keywords:
-
- Quantum Physics
- E-Print:
- 4 pages, 1 figure, 1 table