Experimental Quantum Cloning with Prior Partial Information
Abstract
When prior partial information about a state to be cloned is available, it can be cloned with a fidelity higher than that of universal quantum cloning. We experimentally verify this intriguing relationship between the cloning fidelity and the prior information by reporting the first experimental optimal quantum state-dependent cloner, using nuclear magnetic resonance techniques. Our experiments may further cast important implications into many quantum information processing protocols.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2005
- DOI:
- 10.1103/PhysRevLett.94.040505
- arXiv:
- arXiv:quant-ph/0405094
- Bibcode:
- 2005PhRvL..94d0505D
- Keywords:
-
- 03.67.Dd;
- 76.60.-k;
- Quantum cryptography;
- Nuclear magnetic resonance and relaxation;
- Quantum Physics
- E-Print:
- 4 pages, 2 figures