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Studies in History and Philosophy of Science Part B Studies in History and Philosophy of Modern Physics

Complementarity, wave-particle duality, and domains of applicability

Peter Bokulich

Published Aug 1, 2017• 8 citations
Publisher
DOI
10.1016/j.shpsb.2017.06.004

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This paper presents a finite, regulator-based resolution of wave–particle duality, showing that quantum duality is not a fundamental paradox but a natural consequence of domain separation. Within the Dual Regulator Framework, wave behavior is shown to arise exclusively in the virtual domain (momentum space, off-shell propagation), regulated by the finite invariant Λφ=ln⁡(φ2),\Lambda_\varphi = \ln(\varphi^2),Λφ=ln(φ2), while particle behavior arises exclusively in the real domain (position space, on-shell detection), regulated by the Resolution Gap RG=ln⁡(φ)/ln⁡(π).\mathrm{RG} = \ln(\varphi)/\ln(\pi).RG=ln(φ)/ln(π). The double-slit experiment is reinterpreted as a virtual-domain interference process followed by a real-domain localization event. Which-path detection is shown to force a premature virtual-to-real transition, preventing interference from forming. Partial which-path information produces a quantitative reduction in visibility governed by a finite exponential law. The framework yields explicit, testable predictions with zero adjustable parameters, including: a φ-harmonic correction to interference fringe spacing, a sharp detector-coupling threshold for which-path information, an exact functional form for visibility–distinguishability relations, and scale-dependent corrections for matter-wave interferometry (electrons, neutrons, molecules). All results derive solely from the Trinity constants {π, φ, e}. Complementarity is shown to be a consequence of domain incompatibility, not a primitive principle. Wave–particle duality dissolves into a physically interpretable, observer-independent mechanism. This paper forms Paper II in a planned sequence addressing foundational inconsistencies in quantum field theory, following the finite resolution of the measurement problem.

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Wave–Particle–Entanglement–Ignorance Complementarity for General Bipartite Systems

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Wave-particle duality as the defining characteristic of quantum objects is a typical example of the principle of complementarity. The wave-particle-entanglement (WPE) complementarity, initially developed for two-qubit systems, is an extended form of complementarity that combines wave-particle duality with a previously missing ingredient, quantum entanglement. For two-qubit systems in mixed states, the WPE complementarity was further completed by adding yet another piece that characterizes ignorance, forming the wave-particle-entanglement-ignorance (WPEI) complementarity. A general formulation of the WPEI complementarity can not only shed new light on fundamental problems in quantum mechanics, but can also have a wide range of experimental and practical applications in quantum-mechanical settings. The purpose of this study is to establish the WPEI complementarity for general multi-dimensional bipartite systems in pure or mixed states, and extend its range of applications to incorporate hierarchical and infinite-dimensional bipartite systems. The general formulation is facilitated by well-motivated generalizations of the relevant quantities. When faced with different directions of extensions to take, our guiding principle is that the formulated complementarity should be as simple and powerful as possible. We find that the generalized form of the WPEI complementarity contains unequal-weight averages reflecting the difference in the subsystem dimensions, and that the tangle, instead of the squared concurrence, serves as a more suitable entanglement measure in the general scenario. Two examples, a finite-dimensional bipartite system in mixed states and an infinite-dimensional bipartite system in pure states, are studied in detail to illustrate the general formalism. We also discuss our results in connection with some previous work. The WPEI complementarity for general finite-dimensional bipartite systems may be tested in multi-beam interference experiments, while the second example we studied may facilitate future experimental investigations on complementarity in infinite-dimensional bipartite systems.

Entropy•Jul 24, 2020•5 citations
The complementarity relations in an interferometer reflect an important phenomenon in quantum mechanics: wave-particle duality. Here, we develop a method to quantify both wave and particle behaviors in a multi-path interferometer. In particular, we find that the trace distance is a good candidate for wave and particle measures. As a result, some duality relations and triality ralations are established respectively. This work not only extends the application of the trace distance to the interferometer, but also opens up new perspectives on the quantification of waveness and particleness.
This paper presents a finite, regulator-based resolution of wave–particle duality, showing that quantum duality is not a fundamental paradox but a natural consequence of domain separation. Within the Dual Regulator Framework, wave behavior is shown to arise exclusively in the virtual domain (momentum space, off-shell propagation), regulated by the finite invariant Λφ=ln⁡(φ2),\Lambda_\varphi = \ln(\varphi^2),Λφ=ln(φ2), while particle behavior arises exclusively in the real domain (position space, on-shell detection), regulated by the Resolution Gap RG=ln⁡(φ)/ln⁡(π).\mathrm{RG} = \ln(\varphi)/\ln(\pi).RG=ln(φ)/ln(π). The double-slit experiment is reinterpreted as a virtual-domain interference process followed by a real-domain localization event. Which-path detection is shown to force a premature virtual-to-real transition, preventing interference from forming. Partial which-path information produces a quantitative reduction in visibility governed by a finite exponential law. The framework yields explicit, testable predictions with zero adjustable parameters, including: a φ-harmonic correction to interference fringe spacing, a sharp detector-coupling threshold for which-path information, an exact functional form for visibility–distinguishability relations, and scale-dependent corrections for matter-wave interferometry (electrons, neutrons, molecules). All results derive solely from the Trinity constants {π, φ, e}. Complementarity is shown to be a consequence of domain incompatibility, not a primitive principle. Wave–particle duality dissolves into a physically interpretable, observer-independent mechanism. This paper forms Paper II in a planned sequence addressing foundational inconsistencies in quantum field theory, following the finite resolution of the measurement problem.
Wave-particle duality as the defining characteristic of quantum objects is a typical example of the principle of complementarity. The wave-particle-entanglement (WPE) complementarity, initially developed for two-qubit systems, is an extended form of complementarity that combines wave-particle duality with a previously missing ingredient, quantum entanglement. For two-qubit systems in mixed states, the WPE complementarity was further completed by adding yet another piece that characterizes ignorance, forming the wave-particle-entanglement-ignorance (WPEI) complementarity. A general formulation of the WPEI complementarity can not only shed new light on fundamental problems in quantum mechanics, but can also have a wide range of experimental and practical applications in quantum-mechanical settings. The purpose of this study is to establish the WPEI complementarity for general multi-dimensional bipartite systems in pure or mixed states, and extend its range of applications to incorporate hierarchical and infinite-dimensional bipartite systems. The general formulation is facilitated by well-motivated generalizations of the relevant quantities. When faced with different directions of extensions to take, our guiding principle is that the formulated complementarity should be as simple and powerful as possible. We find that the generalized form of the WPEI complementarity contains unequal-weight averages reflecting the difference in the subsystem dimensions, and that the tangle, instead of the squared concurrence, serves as a more suitable entanglement measure in the general scenario. Two examples, a finite-dimensional bipartite system in mixed states and an infinite-dimensional bipartite system in pure states, are studied in detail to illustrate the general formalism. We also discuss our results in connection with some previous work. The WPEI complementarity for general finite-dimensional bipartite systems may be tested in multi-beam interference experiments, while the second example we studied may facilitate future experimental investigations on complementarity in infinite-dimensional bipartite systems.