Topic
Coherent information
About: Coherent information is a research topic. Over the lifetime, 1225 publications have been published within this topic receiving 46672 citations.
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TL;DR: In this paper, it is shown that if the maximum classical information is obtained, the quantum information becomes zero and if any classical information, including coherent information, is not obtained, then all the information that the physical system has can be transmitted.
Abstract: Quantum and classical informations are considered in quantum measurement processes described by pure operations. The quantum information is given by coherent information in the state change of the measured physical system, and the classical information represented by the Shannon mutual information is obtained from the measurement outcomes. It is shown that if the maximum classical information is obtained, the quantum information becomes zero and if any classical information is not obtained, all the quantum information that the physical system has can be transmitted.
2 citations
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TL;DR: In this paper, the entropy density is introduced as a matrix value used for a detail study of the Information Problem at the universe, and in particular for the Information Paradox Problem, where the main object of deformation is the density matrix.
Abstract: Quantum Mechanics at Planck scale is considered as a deformation of the conventional Quantum Mechanics. Similar to the earlier works of the author, the main object of deformation is the density matrix. On this basis a notion of the entropy density is introduced that is a matrix value used for a detail study of the Information Problem at the Universe, and in particular, for the Information Paradox Problem.
2 citations
01 Jan 2016
TL;DR: There are no reasons to admit the existence of quantum information as qualitatively different from classical information: there is only one kind of information, physically neutral, which can be encoded by means of classical or of quantum states.
Abstract: In this work we will deal only with the concept of information in the communicational context, in which information is primarily something that has to be transmitted for communication purposes. The aim of the paper is to consider some arguments traditionally put forward to support the idea that quantum information is qualitatively different than classical information. On the basis of the analysis of those arguments, we will conclude that there are no reasons to admit the existence of quantum information as qualitatively different from classical information: there is only one kind of information, physically neutral, which can be encoded by means of classical or of quantum states.
2 citations
17 Feb 1998
TL;DR: In this article, the authors derive relation between a quantum channel's capacity to convey classical information and its ability to convey quantum information and show that these properties are related to the channel's ability to communicate quantum coherent information.
Abstract: We derive relation between a quantum channel's capacity to convey classical information and its ability to convey quantum information. We also show that these properties of a quantum channel are related to the channel's ability to convey quantum coherent information.
2 citations
01 Jan 2000
TL;DR: In this article, the potential information capacity of a radiatively stable Λ-system, viewed as the input of a quantum information channel, is studied. But the analysis is based on the notion of coherent information.
Abstract: The potentially attainable information capacity of a radiatively stable Λ -system, viewed as the input of a quantum information channel, is studied. The output of the channel is formed by the states of the photon field with optical excitation frequencies, which are created as a result of Raman pumping. The analysis is based on the notion of coherent information.
2 citations