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Taming the Delayed Choice Quantum Eraser
作者：Johannes Fankhauser
来源：[J].Quanta, 2019, Vol.8 (1), pp.44-56
摘要：I discuss the delayed choice quantum eraser experiment by drawing an analogy to a Bell-type measurement and giving a straightforward account in standard quantum mechanics. The delayed choice quantum eraser experiment turns out to resemble a Bell-type scenario in which the re...
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    Improving the Cauchy–Schwarz Inequality
    作者：Kamal Bhattacharyya
    来源：[J].Quanta, 2019, Vol.8 (1), pp.36-43
    摘要：We highlight overlap as one of the simplest inequalities in linear space that yields a number of useful results. One obtains the Cauchy–Schwarz inequality as a special case. More importantly, a variant of it is seen to work desirably in certain singular situations where the ...
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      Coherence, Interference and Visibility
      作者：Tabish Qureshi
      来源：[J].Quanta, 2019, Vol.8 (1), pp.24-35
      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.11-23
        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.1-10
          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.111-117
            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.74-110
              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.68-73
                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.54-67
                  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.40-53
                    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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