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Quantum machines

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We discuss quantum information processing machines. We start with single purpose machines that either redistribute quantum information or identify quantum states. We then move on to machines that can perform a number of functions, with the function they perform being determined by a program, which is itself a quantum state. Examples of both deterministic and probabilistic programmable machines are given, and we conclude with a discussion of the utility of quantum programs.

Keywords: programmable quantum processors; quantum cloners; quantum control; quantum information theory

Document Type: Research Article


Affiliations: 1: Department of Physics, Hunter College of CUNY, New York, NY, USA 2: Research Center for Quantum Information, Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia,Quniverse, Bratislava, Slovakia

Publication date: September 1, 2009

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