Practical quantum cryptography based on two-photon interferometry
Abstract
We propose an experimental realization of cryptographic-key-sharing scheme exploiting quantum correlations between pair photons. Our experimental setup consists of an external source of correlated photon pairs which propagate to two widely separated unbalanced Mach-Zehnder interferometers. The probability of detection of photon pairs in any two outputs of the interferometers can be fully modulated by phase plates in either interferometer.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 1992
- DOI:
- 10.1103/PhysRevLett.69.1293
- Bibcode:
- 1992PhRvL..69.1293E
- Keywords:
-
- Computer Information Security;
- Cryptography;
- Mach-Zehnder Interferometers;
- Squeezed States (Quantum Theory);
- Crystal Optics;
- Laser Beams;
- Quantum Efficiency;
- Communications and Radar;
- 03.65.Bz;
- 42.50.Wm;
- 89.70.+c;
- Information theory and communication theory