The field of quantum informatics is in rapid evolution. It has three main objectives: the simulation of physical quantum systems that are inaccessible to conventional computing; quantum computing of hard mathematical problems; long-distance quantum communication. We list basic requirements that quantum hardware has to meet, discuss the difficulties encountered, and give a snapshot on experimental approaches to quantum computing and communication in atomic, solid state, and photonic systems.
KeywordsQuantum Computer Quantum Communication Classical Computer Readout Time Quantum Informatics
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