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QUANTUM DISCORD AS A RESOURCE IN QUANTUM COMMUNICATION [PDF]
International Journal of Modern Physics B, 2012 As quantum technologies move from the issues of principle to those of practice, it is important to understand the limitations on attaining tangible quantum advantages. In the realm of quantum communication, quantum discord captures the damaging effects of a decoherent environment.
Animesh Datta +2 more
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Study on Non-Commutativity Measure of Quantum Discord
Mathematics, 2019 In this paper, we are concerned with the non-commutativity measure of quantum discord. We first present an explicit expression of the non-commutativity measure of quantum discord in the two-qubit case.
Jin Liang, Chengwei Zhang
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Generalizations of quantum discord [PDF]
Journal of Physics A: Mathematical and Theoretical, 2011 The original definition of quantum discord of bipartite states was defined over projective measurements, in this paper we discuss some generalizations of it. These generalizations are defined over general measurements, rank-one general measurements or Neumark extension measurements.
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Revealing Tripartite Quantum Discord with Tripartite Information Diagram
Entropy, 2017 A new measure based on the tripartite information diagram is proposed for identifying quantum discord in tripartite systems. The proposed measure generalizes the mutual information underlying discord from bipartite to tripartite systems, and utilizes ...
Wei-Ting Lee, Che-Ming Li
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Entropy, 2021 We propose the first correct special-purpose quantum circuits for preparation of Bell diagonal states (BDS), and implement them on the IBM Quantum computer, characterizing and testing complex aspects of their quantum correlations in the full parameter ...
Elias Riedel Gårding +10 more
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Decomposition Properties of Quantum Discord [PDF]
Communications in Theoretical Physics, 2016 The quantum discord was introduced by Ollivier, Zurek, Henderson and Vedral as an indicator of the degree of quantumness of mixed states. In this paper, we give out the decomposition condition of quantum discords. Moreover, we show that under the condition, the quantum correlations between the quantum systems can be captured completely by the ...
Minhyung Cho, Sunho Kim, Junde Wu
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Channel discord and distortion
New Journal of Physics, 2021 Discord, originally notable as a signature of bipartite quantum correlation, in fact can be nonzero classically, i.e. arising from noisy measurements by one of the two parties.
Wei-Wei Zhang +2 more
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Identification of Unentangled–Entangled Border in the Luttinger Liquid Phase
Crystals, 2019 Quantum discord and entanglement are both criteria for distinguishing quantum correlations in a quantum system. We studied the effect of the transverse magnetic field on the quantum discord of the one-dimensional spin-1/2 XX model.
Somayyeh Nemati +2 more
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Composite Discordant States and Quantum Darwinism. [PDF]
Entropy (Basel), 2022 The framework of Quantum Darwinism strives at characterizing the quantum-to-classical transition by introducing the concept of redundancy of information—as measured by Mutual Information—that a set of observers would acquire on the state of a physical system of interest.
Ryan E, Paternostro M.
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