Abstract: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.
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