Quantum identification system
نویسندگان
چکیده
منابع مشابه
Quantum System Identification
We foiniiihte and study, in ge7leral terms, the problem of quantum sys tem identification, . i .e . , the determination (or estimation) of unknown gumturn channels tlirough their action on suitably chosen input density operators. We a1.w present a quantitative analysis (if the wow-case perfonnnncc of these s ( : h e m c ? . 1 I n t r o d u c t i o n and background I n quantum information theory...
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The aim of quantum system identification is to estimate the ingredients inside a black box, in which some quantum-mechanical unitary process takes place, by just looking at its input-output behavior. Here we establish a basic and general framework for quantum system identification, that allows us to classify how much knowledge about the quantum system is attainable, in principle, from a given e...
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We give a general overview of the state-of-the-art in subspace system identification methods. We have restricted ourselves to the most important ideas and developments since the methods appeared in the late eighties. First, the basis of linear subspace identification are summarized. Different algorithms one finds in literature (Such as N4SID, MOESP, CVA) are discussed and put into a unifyin...
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The time evaluation of quantum entropy in a four-level double- type atomic system is theoretically investigated. Quantum entanglement of the atom and its spontaneous emission fields is then discussed via quantum entropy. It is found that the degree of entanglement can be increased by the quantum interference induced by spontaneous emission. The phase dependence of the atom-field entanglement is...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 1999
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.60.149