翻訳と辞書
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・ Coherence theory of truth
・ Coherence therapy
・ Coherence time
・ Coherence time (communications systems)
・ Coherency Granule
・ Coherent (operating system)
・ Coherent addition
・ Coherent anti-Stokes Raman spectroscopy
・ Coherent backscattering
・ Coherent control
・ Coherent diffraction imaging
・ Coherent duality
・ Coherent effects in semiconductor optics
・ Coherent electromagnetic radio tomography
・ Coherent file distribution protocol
Coherent information
・ Coherent perfect absorber
・ Coherent potential approximation
・ Coherent processing interval
・ Coherent ring
・ Coherent risk measure
・ Coherent sampling
・ Coherent set of characters
・ Coherent sheaf
・ Coherent Solutions
・ Coherent space
・ Coherent spectroscopy
・ Coherent states
・ Coherent states in mathematical physics
・ Coherent topology


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Coherent information : ウィキペディア英語版
Coherent information
Coherent information is an entropy measure used in quantum information theory. It is a property of a quantum state ρ and a quantum channel \mathcal; intuitively, it attempts to describe how much of the quantum information in the state will remain after the state goes through the channel. In this sense, it is intuitively similar to the mutual information of classical information theory. The coherent information is written I(\rho, \mathcal).
==Definition==
The coherent information is defined as I(\rho, \mathcal)\ \stackrel\ S(\mathcal \rho) - S(\mathcal,\rho) where S(\mathcal \rho) is the von Neumann entropy of the output and S(,\rho) is the entropy exchange between the state and the channel.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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