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The classical-quantumboundary forcorrelations: Discordand related measures Kavan ModiAharon BrodutchHugo Cable2012 год

The classical-quantum boundary for correlations: Discord and related measures
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Аннотация: One of the best signatures of nonclassicality in a quantum system is the existence of correlations that have no classical counterpart. Different methods for quantifying the quantum and classical parts of correlations are among the more actively studied topics of quantum-information theory over the past decade. Entanglement is the most prominent of these correlations, but in many cases unentangled states exhibit nonclassical behavior too. Thus distinguishing quantum correlations other than entanglement provides a better division between the quantum and classical worlds, especially when considering mixed states. Here different notions of classical and quantum correlations quantified by quantum discord and other related measures are reviewed. In the first half, the mathematical properties of the measures of quantum correlations are reviewed, related to each other, and the classical-quantum division that is common among them is discussed. In the second half, it is shown that the measures identify and quantify the deviation from classicality in various quantum-information-processing tasks, quantum thermodynamics, open-system dynamics, and many-body physics. It is shown that in many cases quantum correlations indicate an advantage of quantum methods over classical ones.
Год издания: 2012
Авторы: Kavan Modi, Aharon Brodutch, Hugo Cable, Tomasz Paterek, Vlatko Vedral
Издательство: American Physical Society
Источник: Reviews of Modern Physics
Ключевые слова: Quantum Information and Cryptography, Quantum Mechanics and Applications, Advanced Thermodynamics and Statistical Mechanics
Другие ссылки: Reviews of Modern Physics (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
DR-NTU (Nanyang Technological University) (PDF)
DR-NTU (Nanyang Technological University) (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
arXiv (Cornell University) (PDF)
DataCite API (HTML)