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  1. Why the Afshar experiment does not refute complementarity.Ruth Kastner - 2005 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 36 (4):649-658.
    A modified version of Young's experiment by Shahriar Afshar demonstrates that, prior to what appears to be a ``which-way'' measurement, an interference pattern exists. Afshar has claimed that this result constitutes a violation of the Principle of Complementarity. This paper discusses the implications of this experiment and considers how Cramer's Transactional Interpretation easily accomodates the result. It is also shown that the Afshar experiment is isomorphic in key respects to a spin one-half particle prepared as ``spin up along x'' and (...)
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  • Paradox in Wave-Particle Duality.Shahriar S. Afshar, Eduardo Flores, Keith F. McDonald & Ernst Knoesel - 2007 - Foundations of Physics 37 (2):295-305.
    We report on the simultaneous determination of complementary wave and particle aspects of light in a double-slit type “welcher-weg” experiment beyond the limitations set by Bohr’s Principle of Complementarity. Applying classical logic, we verify the presence of sharp interference in the single photon regime, while reliably maintaining the information about the particular pinhole through which each individual photon had passed. This experiment poses interesting questions on the validity of Complementarity in cases where measurements techniques that avoid Heisenberg’s uncertainty principle and (...)
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  • Afshar’s Experiment Does Not Show a Violation of Complementarity.Ole Steuernagel - 2007 - Foundations of Physics 37 (9):1370-1385.
    A recent experiment performed by S. Afshar [first reported by M. Chown, New Sci. 183:30, 2004] is analyzed. It was claimed that this experiment could be interpreted as a demonstration of a violation of the principle of complementarity in quantum mechanics. Instead, it is shown here that it can be understood in terms of classical wave optics and the standard interpretation of quantum mechanics. Its performance is quantified and it is concluded that the experiment is suboptimal in the sense that (...)
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  • The “past” and the “delayed-choice” double-slit experiment.John Archibald Wheeler - 1978 - In A. R. Marlow (ed.), Mathematical foundations of quantum theory. New York: Academic Press.
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  • Critique of Quantum Optical Experimental Refutations of Bohr’s Principle of Complementarity, of the Wootters–Zurek Principle of Complementarity, and of the Particle–Wave Duality Relation.P. N. Kaloyerou - 2016 - Foundations of Physics 46 (2):138-175.
    I argue that quantum optical experiments that purport to refute Bohr’s principle of complementarity fail in their aim. Some of these experiments try to refute complementarity by refuting the so called particle–wave duality relations, which evolved from the Wootters–Zurek reformulation of BPC. I therefore consider it important for my forgoing arguments to first recall the essential tenets of BPC, and to clearly separate BPC from WZPC, which I will argue is a direct contradiction of BPC. This leads to a need (...)
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  • In AR Marlow, editor.J. A. Wheeler - 1978 - In A. R. Marlow (ed.), Mathematical foundations of quantum theory. New York: Academic Press. pp. 9.
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  • Reply to Comments of Steuernagel on the Afshar’s Experiment.Eduardo V. Flores - 2008 - Foundations of Physics 38 (8):778-781.
    We respond to criticism of our paper “Paradox in Wave-Particle Duality for Non-Perturbative Measurements”. We disagree with Steuernagel’s derivation of the visibility of the Afshar experiment. To calculate the fringe visibility, Steuernagel utilizes two different experimental situations, i.e. the wire grid in the pattern minima and in the pattern maxima. In our assessment, this procedure cannot lead to the correct result for the complementarity properties of a wave-particle in one particular experimental set-up.
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  • Complementarity Paradox Solved: Surprising Consequences. [REVIEW]E. V. Flores & J. M. De Tata - 2010 - Foundations of Physics 40 (11):1731-1743.
    Afshar et al. claim that their experiment shows a violation of the complementarity inequality. In this work, we study their claim using a modified Mach-Zehnder setup that represents a simpler version of the Afshar experiment. We find that our results are consistent with Afshar et al. experimental findings. However, we show that within standard quantum mechanics the results of the Afshar experiment do not lead to a violation of the complementarity inequality. We show that their claim originates from a particular (...)
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