We analyze to what extent it is possible to copy arbitrary states of a
two-level quantum system. We show that there exists a üniversal quantum
copying machine", which approximately copies quantum mechanical states in such
a way that the quality of its output does not depend on the input. We also
examine a machine which combines a unitary transformation with a selective
measurement to produce good copies of states in a neighborhood of a particular
state. We discuss the problem of measurement of the output states.
%0 Generic
%1 citeulike:1296915
%A Buzek, Vladimir
%A Hillery, Mark
%D 1996
%K beyond copying no-cloning quantum the theorem
%T Quantum Copying: Beyond the No-Cloning Theorem
%U http://arxiv.org/abs/quant-ph/9607018
%X We analyze to what extent it is possible to copy arbitrary states of a
two-level quantum system. We show that there exists a üniversal quantum
copying machine", which approximately copies quantum mechanical states in such
a way that the quality of its output does not depend on the input. We also
examine a machine which combines a unitary transformation with a selective
measurement to produce good copies of states in a neighborhood of a particular
state. We discuss the problem of measurement of the output states.
@misc{citeulike:1296915,
abstract = {We analyze to what extent it is possible to copy arbitrary states of a
two-level quantum system. We show that there exists a "universal quantum
copying machine", which approximately copies quantum mechanical states in such
a way that the quality of its output does not depend on the input. We also
examine a machine which combines a unitary transformation with a selective
measurement to produce good copies of states in a neighborhood of a particular
state. We discuss the problem of measurement of the output states.},
added-at = {2007-08-18T13:22:24.000+0200},
author = {Buzek, Vladimir and Hillery, Mark},
biburl = {https://www.bibsonomy.org/bibtex/2af79e5516579b52507425809d364cc11/a_olympia},
citeulike-article-id = {1296915},
description = {citeulike},
eprint = {quant-ph/9607018},
interhash = {7b5f9ff037e18096cfec97d49c72015a},
intrahash = {af79e5516579b52507425809d364cc11},
keywords = {beyond copying no-cloning quantum the theorem},
month = Jul,
priority = {2},
timestamp = {2007-08-18T13:22:27.000+0200},
title = {Quantum Copying: Beyond the No-Cloning Theorem},
url = {http://arxiv.org/abs/quant-ph/9607018},
year = 1996
}