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Coherence, Interference and Visibility
作者：Tabish Qureshi
来源：[J].Quanta, 2019, Vol.8 (1), pp.24-35Quanta
摘要：The interference observed for a quanton, traversing more than one path, is believed to characterize its wave nature. Conventionally, the sharpness of interference has been quantified by its visibility or contrast, as defined in optics. Based on this visibility, wave-particle...
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    Quantum Trajectories: Dirac, Moyal and Bohm
    作者：Basil J. Hiley , Maurice A. de Gosson , Glen Dennis
    来源：[J].Quanta, 2019, Vol.8 (1), pp.11-23Quanta
    摘要：We recall Dirac's early proposals to develop a description of quantum phenomena in terms of a non-commutative algebra in which he suggested a way to construct what he called quantum trajectories . Generalising these ideas, we show how they are related to weak values and expl...
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      Latent Complete-Lattice Structure of Hilbert-Space Projectors
      作者：Fedor Herbut
      来源：[J].Quanta, 2019, Vol.8 (1), pp.1-10Quanta
      摘要：To uncover the hidden complete-lattice structure of Hilbert-space projectors, which is not seen by the operator operations and relations (algebraically), resort is taken to the ranges of projectors (to subspaces—to geometry). Taking the range of a projector is completed into...
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        How Does Nature Accomplish Spooky Action at a Distance?
        作者：Mani L. Bhaumik
        来源：[J].Quanta, 2018, Vol.7 (1), pp.111-117Quanta
        摘要：The enigmatic nonlocal quantum correlation that was famously derided by Einstein as "spooky action at a distance" has now been experimentally demonstrated to be authentic. The quantum entanglement and nonlocal correlations emerged as inevitable consequences of John Bell's ep...
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          Quantum Harmonic Analysis of the Density Matrix
          作者：Maurice A. de Gosson
          来源：[J].Quanta, 2018, Vol.7 (1), pp.74-110Quanta
          摘要：We will study rigorously the notion of mixed states and their density matrices. We will also discuss the quantum-mechanical consequences of possible variations of Planck's constant h. This review has been written having in mind two readerships: mathematical physicists and qu...
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            John Bell and the Great Enterprise
            作者：Anthony Sudbery
            来源：[J].Quanta, 2018, Vol.7 (1), pp.68-73Quanta
            摘要：I outline Bell's vision of the "great enterprise" of science, and his view that conventional teachings about quantum mechanics constituted a betrayal of this enterprise. I describe a proposal of his to put the theory on a more satisfactory footing, and review the subsequent ...
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              An Invitation to Quantum Channels
              作者：Vinayak Jagadish , Francesco Petruccione
              来源：[J].Quanta, 2018, Vol.7 (1), pp.54-67Quanta
              摘要：Open quantum systems have become an active area of research, owing to its potential applications in many different fields ranging from computation to biology. Here, we review the formalism of dynamical maps used to represent the time evolution of open quantum systems and dis...
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                Quantum Mechanics and Global Determinism
                作者：Emily Christine Adlam
                来源：[J].Quanta, 2018, Vol.7 (1), pp.40-53Quanta
                摘要：It is proposed that certain features of quantum mechanics may be perspectival effects, which arise because experiments performed on locally accessible variables can only uncover a certain subset of the correlations exhibited by an underlying deterministic theory. This hypoth...
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                  On Schmidt Decomposition: Approach Based on Correlation Operator as Bipartite Entanglement Entity
                  作者：Fedor Herbut
                  来源：[J].Quanta, 2018, Vol.7 (1), pp.19-39Quanta
                  摘要：An elaborated review with proofs of Schmidt canonical decomposition of any bipartite state vector is approached through general subsystem basis expansion. The upgraded forms of Schmidt decomposition in terms of correlation operator and twin observables are presented in detai...
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                    A Quantum Implementation Model for Artificial Neural Networks
                    作者：Ammar Daskin
                    来源：[J].Quanta, 2018, Vol.7 (1), pp.7-18Quanta
                    摘要：The learning process for multilayered neural networks with many nodes makes heavy demands on computational resources. In some neural network models, the learning formulas, such as the Widrow–Hoff formula, do not change the eigenvectors of the weight matrix while flatting the...
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