Experimental demonstration of an efficient quantum phase-covariant cloning and its possible applications to simulating eavesdropping in quantum cryptography
Quantum Physics
2007-05-23 v1
Abstract
We describe a nuclear magnetic resonance (NMR) experiment which implements an efficient one-to-two qubit phase-covariant cloning machine(QPCCM). In the experiment we have achieved remarkably high fidelities of cloning, 0.848 and 0.844 respectively for the original and the blank qubit. This experimental value is close to the optimal theoretical value of 0.854. We have also demonstrated how to use our phase-covariant cloning machine for quantum simulations of bit by bit eavesdropping in the four-state quantum key distribution protocol.
Cite
@article{arxiv.quant-ph/0311010,
title = {Experimental demonstration of an efficient quantum phase-covariant cloning and its possible applications to simulating eavesdropping in quantum cryptography},
author = {Jiangfeng Du and Thomas Durt and Ping Zou and L. C. Kwek and C. H. Lai and C. H. Oh and Artur Ekert},
journal= {arXiv preprint arXiv:quant-ph/0311010},
year = {2007}
}
Comments
4 pages, 5 figures