منابع مشابه
Information Content for Quantum States
Here, Πβ (xi) denotes the normalised projection operators onto the eigenstates xi of ρβ , and the corresponding probability weights wi satisfy wi > 0 and ∑ iwi = 1. Some care has to be taken with this interpretation of ρβ , because in the present context the underpinnings of classical probability are missing, and the associated terminology can only be used, therefore, by analogy. Nevertheless, ...
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Quantum fisher information of a parameter characterizing the sensitivity of a state with respect to parameter changes. In this paper, we study the quantum fisher information of the W state for four, five, six and seven particles in decoherence channels, such as amplitude damping, phase damping and depolarizing channel. Using Krauss operators for decoherence channels components, we investigate t...
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Despite various parallels between quantum states and ordinary information, quantum no-go-theorems have convinced many that there is no realistic framework that might underly quantum theory, no reality that quantum states can represent knowledge about. This paper develops the case that there is a plausible underlying reality: one actual spacetime-based history, although with behavior that appear...
متن کاملQuantum information with Gaussian states
Quantum optical Gaussian states are a type of important robust quantum states which are manipulatable by the existing technologies. So far, most of the important quantum information experiments are done with such states, including bright Gaussian light and weak Gaussian light. Extending the existing results of quantum information with discrete quantum states to the case of continuous variable q...
متن کاملSimple scheme for expanding photonic cluster states for quantum information
P. Kalasuwan, G. Mendoza, A. Laing, T. Nagata, J. Coggins, M. Callaway, S. Takeuchi, A. Stefanov, and J. L. O’Brien* Centre for Quantum Photonics, H. H. Wills Physics Laboratory & Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol, BS8 1UB, UK California Institute of Technology, Pasadena, California 91125, USA Research...
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ژورنال
عنوان ژورنال: Journal of Mathematical Physics
سال: 2000
ISSN: 0022-2488,1089-7658
DOI: 10.1063/1.533260