Quantum copying: A network
Quantum Physics
2009-10-30 v1
Abstract
We present a network consisting of quantum gates which produces two imperfect copies of an arbitrary qubit. The quality of the copies does not depend on the input qubit. We also show that for a restricted class of inputs it is possible to use a very similar network to produce three copies instead of two. For qubits in this class, the copy quality is again independent of the input and is the same as the quality of the copies produced by the two-copy network.
Cite
@article{arxiv.quant-ph/9703046,
title = {Quantum copying: A network},
author = {V. Buzek and S. L. Braunstein and M. Hillery and D. Bruss},
journal= {arXiv preprint arXiv:quant-ph/9703046},
year = {2009}
}
Comments
10 pages LaTeX, with 1 figure, submitted to the Physical Review A