Results 11 to 20 of about 3,721,262 (281)
Feynman Paths and Weak Values [PDF]
Entropy, 2018 There has been a recent revival of interest in the notion of a ‘trajectory’ of a quantum particle. In this paper, we detail the relationship between Dirac’s ideas, Feynman paths and the Bohm approach. The key to the relationship is the weak value of the momentum which Feynman calls a transition probability amplitude.
Robert Flack, Basil Hiley
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Anomalous weak values via a single photon detection [PDF]
Light: Science & Applications, 2021 Is it possible that a measurement of a spin component of a spin-1/2 particle yields the value 100? In 1988 Aharonov, Albert and Vaidman argued that upon pre- and postselection of particular spin states, weakening the coupling of a standard measurement ...
Enrico Rebufello +9 more
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Quantum Weak Values and the “Which Way?” Question [PDF]
EntropyThe Uncertainty Principle forbids one to determine which of the two paths a quantum system has travelled, unless interference between the alternatives had been destroyed by a measuring device, e.g., by a pointer.
Anton Uranga +2 more
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Direct quantum process tomography via measuring sequential weak values of incompatible observables [PDF]
Nature Communications, 2018 Weak measurements constitute a powerful tool for metrology, tomography and even foundations, but in most cases could be explained classically. Here, the authors characterise a quantum channel using sequential weak value measurements of two incompatible ...
Yosep Kim +6 more
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Publisher Correction: Direct quantum process tomography via measuring sequential weak values of incompatible observables [PDF]
Nature Communications, 2018 In the original version of this Article, the penultimate sentence of the second paragraph of the “Schematic and theory” section of the Results originally incorrectly read as “For instance, choosing θA = π/4, 0, −π/8 and π/8 rotates the bases |0>, |1>, |+>
Yosep Kim +6 more
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Frontiers in Physics, 2022 As one of the fundamental traits governing the operation of quantum world, the uncertainty relation, from the perspective of Heisenberg, rules the minimum deviation of two incompatible observations for arbitrary quantum states.
Xing-Yan Fan +5 more
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Anomalous Weak Values Without Post-Selection [PDF]
Quantum, 2019 A weak measurement performed on a pre- and post-selected quantum system can result in an average value that lies outside of the observable's spectrum. This effect, usually referred to as an ``anomalous weak value'', is generally believed to be possible ...
Alastair A. Abbott +4 more
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Weak values from path integrals
Physical Review Research, 2020 We connect the weak measurements framework to the path integral formulation of quantum mechanics. We show how Feynman propagators can in principle be experimentally inferred from weak value measurements. We also obtain expressions for weak values parsing
A. Matzkin
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A New Class of Retrocausal Models
Entropy, 2018 Globally-constrained classical fields provide a unexplored framework for modeling quantum phenomena, including apparent particle-like behavior. By allowing controllable constraints on unknown past fields, these models are retrocausal but not retro ...
Ken Wharton
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Contextuality, coherences, and quantum Cheshire cats
New Journal of Physics, 2023 We analyse the quantum Cheshire cat using contextuality theory, to see if this can tell us anything about how best to interpret this paradox. We show that this scenario can be analysed using the relation between three different measurements, which seem ...
Jonte R Hance, Ming Ji, Holger F Hofmann
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