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...
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...
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...
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...
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...
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 ...
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...
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...
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...
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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