Mathematical Physics and Quantum Field Theory
Electron. J. Diff. Eqns., Conf. 04, 2000, pp. 113120.
Quantum Copying: A Review
Mark Hillery
Abstract:
Quantum information is stored in twolevel quantum systems
known as qubits. The nocloning theorem states that the
state of an unknown qubit cannot be copied. This is in
contrast to classical information which can be copied. If
one drops the requirement that the copies be perfect it is
possible to design quantum copiers. This paper presents
a short review of the theory of quantum copying.
Published July 12, 2000.
Mathematics Subject Classifications: 81P68.
Key words: Quantum computing, qubits, nocloning theorem, quantum copying.
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Mark Hillery
Department of Physics and Astronomy
Hunter College of the City University of New York
695 Park Avenue
New York NY 10021
email: mhillery@shiva.hunter.cuny.edu 
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