Information transfer and fidelity in quantum copiers
نویسندگان
چکیده
منابع مشابه
Information Transfer Fidelity in Networks of Spins
Networks of spins, or spintronic networks, are given an Information Transfer Fidelity (ITF) derived from an upper bound on the probability of transmission of the excitation from one spin to another. It is shown that this theoretical bound can be reached asymptotically in time under certain conditions. The process of achieving maximum transfer probability is given a dynamical model, the translat...
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Copying machines in general use two approaches. One of the extreme cases is a classical copying machine, where measurements ~destructive or nondestructive! are made on the original state, the results of which are then fed as parameters into some state preparation scheme that attempts to construct a copy of the original. This approach obviously allows one to generate an arbitrary amount of copie...
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Spin networks are endowed with an information transfer fidelity (ITF), which defines an absolute upper bound on the probability of transmission of an excitation from one spin to another. The ITF is easily computable, but the bound can be reached asymptotically in time only under certain conditions. General conditions for attainability of the bound are established, and the process of achieving t...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2000
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.61.062304