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  • No Purification Ontology, No Quantum Paradoxes
    Found. Phys. (IF 1.437) Pub Date : 2020-11-18
    Giacomo Mauro D’Ariano

    It is almost universally believed that in quantum theory the two following statements hold: (1) all transformations are achieved by a unitary interaction followed by a von-Neumann measurement; (2) all mixed states are marginals of pure entangled states. I name this doctrine the dogma of purification ontology. The source of the dogma is the original von Neumann axiomatisation of the theory, which largely

    更新日期:2020-11-18
  • Local Model of Entangled Photon Experiments Compatible with Quantum Predictions Based on the Reality of the Vacuum Fields
    Found. Phys. (IF 1.437) Pub Date : 2020-11-07
    Emilio Santos

    Arguments are provided for the reality of the quantum vacuum fields. A polarization correlation experiment with two maximally entangled photons created by spontaneous parametric down-conversion is studied in the Weyl–Wigner formalism, that reproduces the quantum predictions. An interpretation is proposed in terms of stochastic processes assuming that the quantum vacuum fields are real. This proves

    更新日期:2020-11-09
  • The Zeroth Law of Thermodynamics in Special Relativity
    Found. Phys. (IF 1.437) Pub Date : 2020-11-05
    L. Gavassino

    We critically revisit the definition of thermal equilibrium, in its operational formulation, provided by standard thermodynamics. We show that it refers to experimental conditions which break the covariance of the theory at a fundamental level and that, therefore, it cannot be applied to the case of moving bodies. We propose an extension of this definition which is manifestly covariant and can be applied

    更新日期:2020-11-05
  • A Puzzle for the Field Ontologists
    Found. Phys. (IF 1.437) Pub Date : 2020-10-31
    Shan Gao

    It has been widely thought that the wave function describes a real, physical field in a realist interpretation of quantum mechanics. In this paper, I present a new analysis of the field ontology for the wave function. First, I argue that the non-existence of self-interactions for a quantum system such as an electron poses a puzzle for the field ontologists. If the wave function represents a physical

    更新日期:2020-11-02
  • Newtonian Fractional-Dimension Gravity and MOND
    Found. Phys. (IF 1.437) Pub Date : 2020-10-30
    Gabriele U. Varieschi

    This paper introduces a possible alternative model of gravity based on the theory of fractional-dimension spaces and its applications to Newtonian gravity. In particular, Gauss’s law for gravity as well as other fundamental classical laws are extended to a D-dimensional metric space, where D can be a non-integer dimension. We show a possible connection between this Newtonian Fractional-Dimension Gravity

    更新日期:2020-11-02
  • Quantumness of States and Unitary Operations
    Found. Phys. (IF 1.437) Pub Date : 2020-10-30
    Joanna Luc

    This paper investigates various properties that may by possessed by quantum states, which are believed to be specifically “quantum” (entanglement, nonlocality, steerability, negative conditional entropy, non-zero quantum discord, non-zero quantum super discord and contextuality) and their opposites. It also considers their “absolute” counterparts in the following sense: a given state has a given property

    更新日期:2020-10-30
  • Propagation Properties of Bound Electromagnetic Field: Classical and Quantum Viewpoints
    Found. Phys. (IF 1.437) Pub Date : 2020-10-24
    A. L. Kholmetskii, O. V. Missevitch, T. Yarman, R. Smirnov-Rueda

    The present work is motivated by recent experiments aimed to measure the propagation velocity of bound electromagnetic (EM) field (Missevitch, et al. in EPL 93:64004, 2011; de Sangro et al. in Eur Phys J C 75:137, 2015) that reveal no retardation in the absence of EM radiation. We show how these findings can be incorporated into the mathematical structure of special relativity theory that allows us

    更新日期:2020-10-26
  • There is No New Problem for Quantum Mechanics
    Found. Phys. (IF 1.437) Pub Date : 2020-10-18
    Lev Vaidman

    A recent claim by Meehan that quantum mechanics has a new “control problem” that puts limits on our ability to prepare quantum states and revises our understanding of the no-cloning theorem is examined. We identify flaws in Meehan’s analysis and argue that such a problem does not exist.

    更新日期:2020-10-19
  • Hardy Relations and Common Cause
    Found. Phys. (IF 1.437) Pub Date : 2020-10-13
    Katsuaki Higashi

    Some researchers argued that in the non-existence proof of hidden variables, the existence of a common common-cause of multiple correlations is tacitly assumed and that the assumption is unreasonably strong. According to their idea, it is sufficient if the separate common-cause of each correlation exists. However, for such an idea, various no-go results are already known. Recently, Higashi showed that

    更新日期:2020-10-13
  • On the Equivalence Principle and Relativistic Quantum Mechanics
    Found. Phys. (IF 1.437) Pub Date : 2020-10-06
    Maciej Trzetrzelewski

    Einstein’s Equivalence Principle implies that the Lorentz force equation can be derived from a geodesic equation by imposing a certain (necessary) condition on the electromagnetic potential (Trzetrzelewski, EPL 120:4, 2018). We analyze the quantization of that constraint and find the corresponding differential equations for the phase of the wave function. We investigate these equations in the case

    更新日期:2020-10-07
  • Conformal Invariance of the Newtonian Weyl Tensor
    Found. Phys. (IF 1.437) Pub Date : 2020-10-06
    Neil Dewar, James Read

    It is well-known that the conformal structure of a relativistic spacetime is of profound physical and conceptual interest. In this note, we consider the analogous structure for Newtonian theories. We show that the Newtonian Weyl tensor is an invariant of this structure.

    更新日期:2020-10-07
  • Derivation of Classical Mechanics in an Energetic Framework via Conservation and Relativity
    Found. Phys. (IF 1.437) Pub Date : 2020-10-03
    Philip Goyal

    The notions of conservation and relativity lie at the heart of classical mechanics, and were critical to its early development. However, in Newton’s theory of mechanics, these symmetry principles were eclipsed by domain-specific laws. In view of the importance of symmetry principles in elucidating the structure of physical theories, it is natural to ask to what extent conservation and relativity determine

    更新日期:2020-10-04
  • Conditional Action and Quantum Versions of Maxwell’s Demon
    Found. Phys. (IF 1.437) Pub Date : 2020-09-30
    Heinz-Jürgen Schmidt

    We propose a new way of looking at the quantum Maxwell’s demon problem in terms of conditional action. A “conditional action” on a system is a unitary time evolution, selected according to the result of a previous measurement, which can reduce the entropy of the system. However, any conditional action can be realized by an (unconditional) unitary time evolution of a larger system and a subsequent Lüders

    更新日期:2020-10-02
  • Eternalism and Perspectival Realism About the ‘Now’
    Found. Phys. (IF 1.437) Pub Date : 2020-09-24
    Matias Slavov

    Eternalism is the view that all times are equally real. The relativity of simultaneity in special relativity backs this up. There is no cosmically extended, self-existing ‘now.’ This leads to a tricky problem. What makes statements about the present true? I shall approach the problem along the lines of perspectival realism and argue that the choice of the perspective does. To corroborate this point

    更新日期:2020-09-24
  • Evolution of Superoscillations in the Dirac Field
    Found. Phys. (IF 1.437) Pub Date : 2020-09-22
    Fabrizio Colombo, Giovanni Valente

    Superoscillating functions are band-limited functions that can oscillate faster than their fastest Fourier component. The study of the evolution of superoscillations as initial datum of field equations requires the notion of supershift, which generalizes the concept of superoscillations. The present paper has a dual purpose. The first one is to give an updated and self-contained explanation of the

    更新日期:2020-09-23
  • Elementary Charge and Neutrino’s Mass from Planck Length
    Found. Phys. (IF 1.437) Pub Date : 2020-09-22
    Saulo Carneiro

    It is shown that the postulation of a minimum length for the horizons of a black hole leads to lower bounds for the electric charges and magnetic moments of elementary particles. If the minimum length has the order of the Planck scale, these bounds are given, respectively, by the electronic charge and by \(\mu \sim 10^{-21} \mu _B\). The latter implies that the masses of fundamental particles are bounded

    更新日期:2020-09-22
  • Triple Path to the Exponential Metric
    Found. Phys. (IF 1.437) Pub Date : 2020-09-20
    Maxim Makukov, Eduard Mychelkin

    The exponential Papapetrou metric induced by scalar field conforms to observational data not worse than the vacuum Schwarzschild solution. Here, we analyze the origin of this metric as a peculiar space-time within a wide class of scalar and antiscalar solutions of the Einstein equations parameterized by scalar charge. Generalizing the three families of static solutions obtained by Fisher (Zhurnal Experimental’noj

    更新日期:2020-09-20
  • An Interaction-Free Quantum Measurement-Driven Engine
    Found. Phys. (IF 1.437) Pub Date : 2020-09-18
    Cyril Elouard, Mordecai Waegell, Benjamin Huard, Andrew N. Jordan

    Recently highly-efficient quantum engines were devised by exploiting the stochastic energy changes induced by quantum measurement. Here we show that such an engine can be based on an interaction-free measurement, in which the meter seemingly does not interact with the measured object. We use a modified version of the Elitzur–Vaidman bomb tester, an interferometric setup able to detect the presence

    更新日期:2020-09-20
  • Fermi’s Golden Rule and the Second Law of Thermodynamics
    Found. Phys. (IF 1.437) Pub Date : 2020-09-18
    D. Braak, J. Mannhart

    We present a Gedankenexperiment that leads to a violation of detailed balance if quantum mechanical transition probabilities are treated in the usual way by applying Fermi’s “golden rule”. This Gedankenexperiment introduces a collection of two-level systems that absorb and emit radiation randomly through non-reciprocal coupling to a waveguide, as realized in specific chiral quantum optical systems

    更新日期:2020-09-20
  • No Paradox in Wave–Particle Duality
    Found. Phys. (IF 1.437) Pub Date : 2020-09-17
    Andrew Knight

    The assertion that an experiment by Afshar et al. demonstrates violation of Bohr’s Principle of Complementarity is based on the faulty assumption that which-way information in a double-slit interference experiment can be retroactively determined from a future measurement.

    更新日期:2020-09-17
  • Extending the Agent in QBism
    Found. Phys. (IF 1.437) Pub Date : 2020-09-15
    Jacques Pienaar

    According to the subjective Bayesian interpretation of quantum mechanics (QBism), the instruments used to measure quantum systems are to be regarded as an extension of the senses of the agent who is using them, and quantum states describe the agent’s expectations for what they will experience through these extended senses. How can QBism then account for the fact that (i) instruments must be calibrated

    更新日期:2020-09-15
  • Measurement and Quantum Dynamics in the Minimal Modal Interpretation of Quantum Theory
    Found. Phys. (IF 1.437) Pub Date : 2020-09-07
    Jacob A. Barandes, David Kagan

    Any realist interpretation of quantum theory must grapple with the measurement problem and the status of state-vector collapse. In a no-collapse approach, measurement is typically modeled as a dynamical process involving decoherence. We describe how the minimal modal interpretation closes a gap in this dynamical description, leading to a complete and consistent resolution to the measurement problem

    更新日期:2020-09-08
  • The Kac Ring or the Art of Making Idealisations
    Found. Phys. (IF 1.437) Pub Date : 2020-09-07
    Julie Jebeile

    In 1959, mathematician Mark Kac introduced a model, called the Kac ring, in order to elucidate the classical solution of Boltzmann to the problem of macroscopic irreversibility. However, the model is far from being a realistic representation of something. How can it be of any help here? In philosophy of science, it is often argued that models can provide explanations of the phenomenon they are said

    更新日期:2020-09-08
  • On the Classification Between $$\psi$$ ψ -Ontic and $$\psi$$ ψ -Epistemic Ontological Models
    Found. Phys. (IF 1.437) Pub Date : 2020-09-05
    Andrea Oldofredi, Cristian López

    Harrigan and Spekkens (Found Phys 40:125–157, 2010) provided a categorization of quantum ontological models classifying them as \(\psi\)-ontic or \(\psi\)-epistemic if the quantum state \(\psi\) describes respectively either a physical reality or mere observers’ knowledge. Moreover, they claimed that Einstein—who was a supporter of the statistical interpretation of quantum mechanics—endorsed an epistemic

    更新日期:2020-09-06
  • The Science of $${\Theta \Delta }^{\text{cs}}$$ Θ Δ cs
    Found. Phys. (IF 1.437) Pub Date : 2020-08-26
    Wayne C. Myrvold

    There is a long tradition of thinking of thermodynamics, not as a theory of fundamental physics (or even a candidate theory of fundamental physics), but as a theory of how manipulations of a physical system may be used to obtain desired effects, such as mechanical work. On this view, the basic concepts of thermodynamics, heat and work, and with them, the concept of entropy, are relative to a class

    更新日期:2020-08-27
  • Respecting One’s Fellow: QBism’s Analysis of Wigner’s Friend
    Found. Phys. (IF 1.437) Pub Date : 2020-08-18
    John B. DeBrota, Christopher A. Fuchs, Rüdiger Schack

    According to QBism, quantum states, unitary evolutions, and measurement operators are all understood as personal judgments of the agent using the formalism. Meanwhile, quantum measurement outcomes are understood as the personal experiences of the same agent. Wigner’s conundrum of the friend, in which two agents ostensibly have different accounts of whether or not there is a measurement outcome, thus

    更新日期:2020-08-18
  • Emergence in Solid State Physics and Biology
    Found. Phys. (IF 1.437) Pub Date : 2020-08-18
    George F. R. Ellis

    There has been much controversy over weak and strong emergence in physics and biology. As pointed out by Phil Anderson in many papers, the existence of broken symmetries is the key to emergence of properties in much of solid state physics. By carefully distinguishing between different types of symmetry breaking and tracing the relation between broken symmetries at micro and macro scales, I demonstrate

    更新日期:2020-08-18
  • Misconceptions on Effective Field Theories and Spontaneous Symmetry Breaking: Response to Ellis’ Article
    Found. Phys. (IF 1.437) Pub Date : 2020-08-18
    Thomas Luu, Ulf-G. Meißner

    In an earlier paper Luu and Meißner (arXiv:1910.13770 [physics.hist-ph]) we discussed emergence from the context of effective field theories, particularly as related to the fields of particle and nuclear physics. We argued on the side of reductionism and weak emergence. George Ellis has critiqued our exposition in Ellis (arXiv:2004.13591 [physics.hist-ph]), and here we provide our response to his critiques

    更新日期:2020-08-18
  • Are Quantum Spins but Small Perturbations of Ontological Ising Spins?
    Found. Phys. (IF 1.437) Pub Date : 2020-08-18
    Hans-Thomas Elze

    The dynamics-from-permutations of classical Ising spins is generalized here for an arbitrarily long chain. This serves as an ontological model with discrete dynamics generated by pairwise exchange interactions defining the unitary update operator. The model incorporates a finite signal velocity and resembles in many aspects a discrete free field theory. We deduce the corresponding Hamiltonian operator

    更新日期:2020-08-18
  • The Causal Closure of Physics in Real World Contexts.
    Found. Phys. (IF 1.437) Pub Date : 2020-08-18
    George F R Ellis

    The causal closure of physics is usually discussed in a context free way. Here I discuss it in the context of engineering systems and biology, where strong emergence takes place due to a combination of upwards emergence and downwards causation (Ellis, Emergence in Solid State Physics and Biology, 2020, arXiv:2004.13591). Firstly, I show that causal closure is strictly limited in terms of spatial interactions

    更新日期:2020-08-18
  • Group Theoretical Derivation of Consistent Free Particle Theories
    Found. Phys. (IF 1.437) Pub Date : 2020-08-14
    Giuseppe Nisticò

    The difficulties of relativistic particle theories formulated by means of canonical quantization, such as those of Klein–Gordon and Dirac, ultimately led theoretical physicists to turn to quantum field theory to model elementary particle physics. In order to overcome these difficulties, the theories of the present approach are developed deductively from the physical principles that specify the system

    更新日期:2020-08-14
  • Constructivism and Realism in Boltzmann’s Thermodynamics’ Atomism
    Found. Phys. (IF 1.437) Pub Date : 2020-08-11
    Luiz Pinguelli Rosa, Elaine Andrade, Paulo Picciani, Jean Faber

    Ludwig Boltzmann is one of the foremost responsible for the development of modern atomism in thermodynamics. His proposition was revolutionary not only because it brought a new vision for Thermodynamics, merging a statistical approach with Newtonian physics, but also because he produced an entirely new perspective on the way of thinking about and describing physical phenomena. Boltzmann dared to flirt

    更新日期:2020-08-11
  • Kepler Problem in Space with Deformed Lorentz-Covariant Poisson Brackets
    Found. Phys. (IF 1.437) Pub Date : 2020-08-03
    M. I. Samar; V. M. Tkachuk

    We propose a Lorentz-covariant deformed algebra describing a (3 + 1)-dimensional quantized spacetime, which in the nonrelativistic limit leads to undeformed one. The deformed Poincaré transformations leaving the algebra invariant are identified. In the classical limit the Lorentz-covariant deformed algebra yields the deformed Lorentz-covariant Poisson brackets. Kepler problem with the deformed Lorentz-covariant

    更新日期:2020-08-03
  • Intuitionist Physics
    Found. Phys. (IF 1.437) Pub Date : 2020-07-28
    P.-M. Binder

    A recent proposal to formulate physics in terms of finite-information variables is examined, concentrating on its consequences for classical mechanics. Both shortcomings and promising avenues are discussed.

    更新日期:2020-07-28
  • Trajectory Interpretation of Correspondence Principle: Solution of Nodal Issue
    Found. Phys. (IF 1.437) Pub Date : 2020-07-25
    Ciann-Dong Yang; Shiang-Yi Han

    The correspondence principle states that the quantum system will approach the classical system in high quantum numbers. Indeed, the average of the quantum probability density distribution reflects a classical-like distribution. However, the probability of finding a particle at the node of the wave function is zero. This condition is recognized as the nodal issue. In this paper, we propose a solution

    更新日期:2020-07-25
  • How Humean is Bohumianism?
    Found. Phys. (IF 1.437) Pub Date : 2020-07-22
    Tomasz Bigaj, Antonio Vassallo

    An important part of the influential Humean doctrine in philosophy is the supervenience principle (sometimes referred to as the principle of separability). This principle asserts that the complete state of the world supervenes on the intrinsic properties of its most fundamental components and their spatiotemporal relations (the so-called Humean mosaic). There are well-known arguments in the literature

    更新日期:2020-07-22
  • Markovian and Non-Markovian Quantum Measurements
    Found. Phys. (IF 1.437) Pub Date : 2020-07-22
    Jennifer R. Glick; Christoph Adami

    Consecutive measurements performed on the same quantum system can reveal fundamental insights into quantum theory’s causal structure, and probe different aspects of the quantum measurement problem. According to the Copenhagen interpretation, measurements affect the quantum system in such a way that the quantum superposition collapses after each measurement, erasing any memory of the prior state. We

    更新日期:2020-07-22
  • Empirical Underdetermination for Physical Theories in C* Algebraic Setting: Comments to an Arageorgis's Argument
    Found. Phys. (IF 1.437) Pub Date : 2020-07-18
    Chrysovalantis Stergiou

    In this paper, I reconstruct an argument of Aristidis Arageorgis against empirical underdetermination of the state of a physical system in a C*-algebraic setting and explore its soundness. The argument, aiming against algebraic imperialism, the operationalist attitude which characterized the first steps of Algebraic Quantum Field Theory, is based on two topological properties of the state space: being

    更新日期:2020-07-18
  • Quantum Mechanics and Its Interpretations: A Defense of the Quantum Principles
    Found. Phys. (IF 1.437) Pub Date : 2020-07-17
    Sébastien Poinat

    One of the most striking features of the epistemological situation of Quantum Mechanics is the number of interpretations and the many schools of thought, with no consensus on the way to understand the theory. In this article, I introduce a distinction between orthodox interpretations and heterodox interpretations of Quantum Mechanics: the orthodox interpretations preserve all the quantum principles

    更新日期:2020-07-17
  • Operational Restrictions in General Probabilistic Theories
    Found. Phys. (IF 1.437) Pub Date : 2020-07-12
    Sergey N. Filippov; Stan Gudder; Teiko Heinosaari; Leevi Leppäjärvi

    The formalism of general probabilistic theories provides a universal paradigm that is suitable for describing various physical systems including classical and quantum ones as particular cases. Contrary to the usual no-restriction hypothesis, the set of accessible meters within a given theory can be limited for different reasons, and this raises a question of what restrictions on meters are operationally

    更新日期:2020-07-12
  • On the Second Dipole Moment of Dirac’s Particle
    Found. Phys. (IF 1.437) Pub Date : 2020-07-10
    Engel Roza

    An analysis is presented of the possible existence of the second anomalous dipole moment of Dirac’s particle next to the one associated with the angular momentum. It includes a discussion why, in spite of his own derivation, Dirac has doubted about its relevancy. It is shown why since then it has been overlooked and why it has vanished from leading textbooks. A critical survey is given on the reasons

    更新日期:2020-07-10
  • Noncommutative Momentum and Torsional Regularization
    Found. Phys. (IF 1.437) Pub Date : 2020-07-10
    Nikodem Popławski

    We show that in the presence of the torsion tensor \(S^k_{ij}\), the quantum commutation relation for the four-momentum, traced over spinor indices, is given by \([p_i,p_j]=2i\hbar S^k_{ij}p_k\). In the Einstein–Cartan theory of gravity, in which torsion is coupled to spin of fermions, this relation in a coordinate frame reduces to a commutation relation of noncommutative momentum space, \([p_i,p_j]=i\epsilon

    更新日期:2020-07-10
  • Addressing the cosmological $$H_0$$ H 0 tension by the Heisenberg uncertainty
    Found. Phys. (IF 1.437) Pub Date : 2020-07-08
    Salvatore Capozziello; Micol Benetti; Alessandro D. A. M. Spallicci

    The uncertainty on measurements, given by the Heisenberg principle, is a quantum concept usually not taken into account in General Relativity. From a cosmological point of view, several authors wonder how such a principle can be reconciled with the Big Bang singularity, but, generally, not whether it may affect the reliability of cosmological measurements. In this letter, we express the Compton mass

    更新日期:2020-07-08
  • Algorithmic Measurement Procedures
    Found. Phys. (IF 1.437) Pub Date : 2020-07-08
    Aldo F. G. Solis-Labastida; Jorge G. Hirsch

    Measurements are shown to be processes designed to return figures: they are effective. This effectivity allows for a formalization as Turing machines, which can be described employing computation theory. Inspired in the halting problem we draw some limitations for measurement procedures: procedures that verify if a quantity is measured cannot work in every case.

    更新日期:2020-07-08
  • ”The Unavoidable Interaction Between the Object and the Measuring Instruments”: Reality, Probability, and Nonlocality in Quantum Physics
    Found. Phys. (IF 1.437) Pub Date : 2020-06-30
    Arkady Plotnitsky

    This article aims to contribute to the ongoing task of clarifying the relationships between reality, probability, and nonlocality in quantum physics. It is in part stimulated by Khrennikov’s argument, in several communications, for “eliminating the issue of quantum nonlocality” from the analysis of quantum entanglement. I argue, however, that the question may not be that of eliminating but instead

    更新日期:2020-06-30
  • A Quantum Field Theory View of Interaction Free Measurements
    Found. Phys. (IF 1.437) Pub Date : 2020-06-30
    Filipe C. R. Barroso; Orfeu Bertolami

    We propose a Quantum Field Theory description of beams on a Mach–Zehnder interferometer and apply the method to describe Interaction Free Measurements (IFMs), concluding that there is a change of momentum of the fields in IFMs. Analysing the factors involved in the probability of emission of low-energy photons, we argue that they do not yield meaningful contributions to the probabilities of the IFMs

    更新日期:2020-06-30
  • The Connection between Bohmian Mechanics and Many-Particle Quantum Hydrodynamics
    Found. Phys. (IF 1.437) Pub Date : 2020-06-25
    Klaus Renziehausen; Ingo Barth

    Bohm developed the Bohmian mechanics (BM), in which the Schrödinger equation is transformed into two differential equations: a continuity equation and an equation of motion similar to the Newtonian equation of motion. This transformation can be executed both for single-particle systems and for many-particle systems. Later, Kuzmenkov and Maksimov used basic quantum mechanics for the derivation of many-particle

    更新日期:2020-06-25
  • Path Integrals and Holism
    Found. Phys. (IF 1.437) Pub Date : 2020-06-22
    Marco Forgione

    This paper argues that the path integral formulation of quantum mechanics suggests a form of holism for which the whole (total ensemble of paths) has properties that are not strongly reducible to the properties of the parts (the single trajectories). Feynman’s sum over histories calculates the probability amplitude of a particle moving within a boundary by summing over all the possible trajectories

    更新日期:2020-06-22
  • Semiclassical Analysis of the Interaction of the Magnetic Quadrupole Moment of a Neutral Particle with Axial Electric Fields in a Uniformly Rotating Frame
    Found. Phys. (IF 1.437) Pub Date : 2020-06-08
    S. L. R. Vieira; K. Bakke

    By exploring the hypothesis of magnetic monopoles, we consider the existence of electric fields produced by magnetic current densities. Then, we consider a uniformly rotating frame with the purpose of searching for effects of rotation on the interaction of axial electric fields with the magnetic quadrupole moment of a neutral particle. Our analysis is made through the WKB (Wentzel, Kramers and Brillouin)

    更新日期:2020-06-08
  • QBism Is Not So Simply Dismissed
    Found. Phys. (IF 1.437) Pub Date : 2020-05-19
    Ali Barzegar

    QBism is one of the main candidates for an epistemic interpretation of quantum mechanics. According to QBism, the quantum state or the wavefunction represents the subjective degrees of belief of the agent assigning the state. But, although the quantum state is not part of the furniture of the world, quantum mechanics grasps the real via the Born rule which is a consistency condition for the probability

    更新日期:2020-05-19
  • Quantum Causality Relations and the Emergence of Reality from Coherent Superpositions
    Found. Phys. (IF 1.437) Pub Date : 2020-05-18
    Holger F. Hofmann

    The Hilbert space formalism describes causality as a statistical relation between initial experimental conditions and final measurement outcomes, expressed by the inner products of state vectors representing these conditions. This representation of causality is in fundamental conflict with the classical notion that causality should be expressed in terms of the continuity of intermediate realities.

    更新日期:2020-05-18
  • From Path Integrals to Dynamical Algebras: A Macroscopic View of Quantum Physics
    Found. Phys. (IF 1.437) Pub Date : 2020-05-04
    Detlev Buchholz; Klaus Fredenhagen

    The essence of the path integral method in quantum physics can be expressed in terms of two relations between unitary propagators, describing perturbations of the underlying system. They inherit the causal structure of the theory and its invariance properties under variations of the action. These relations determine a dynamical algebra of bounded operators which encodes all properties of the corresponding

    更新日期:2020-05-04
  • Everett’s Missing Postulate and the Born Rule
    Found. Phys. (IF 1.437) Pub Date : 2020-04-26
    Per Arve

    Everett’s Relative State Interpretation has gained increasing interest due to the progress of understanding the role of decoherence. In order to fulfill its promise as a realistic description of the physical world, two postulates are formulated. In short they are (1) for a system with continuous coordinates \({\mathbf {x}}\), discrete variable j, and state \(\psi _j({\mathbf {x}})\), the density \(\rho

    更新日期:2020-04-26
  • Correction to: Gleason-Type Theorems from Cauchy’s Functional Equation
    Found. Phys. (IF 1.437) Pub Date : 2020-04-15
    Victoria J. Wright, Stefan Weigert

    The authors would like to make the corrections to the original article described below.

    更新日期:2020-04-23
  • SICs: Some Explanations
    Found. Phys. (IF 1.437) Pub Date : 2020-04-09
    Ingemar Bengtsson

    The problem of constructing maximal equiangular tight frames or SICs was raised by Zauner in 1998. Four years ago it was realized that the problem is closely connected to a major open problem in number theory. We discuss why such a connection was perhaps to be expected, and give a simplified sketch of some developments that have taken place in the past 4 years. The aim, so far unfulfilled, is to prove

    更新日期:2020-04-23
  • Copenhagen Interpretation Can Survive the Upgraded Schrödinger’s cat Gedankenexperiment
    Found. Phys. (IF 1.437) Pub Date : 2020-04-18
    Guang Ping He

    Recently, Frauchiger and Renner proposed a Gedankenexperiment, which was claimed to be able to prove that quantum theory cannot consistently describe the use of itself. Here we show that the conclusions of Frauchiger and Renner actually came from their incorrect description of some quantum states. With the correct description there will be no inconsistent results, no matter which quantum interpretation

    更新日期:2020-04-18
  • The CHSH Test Can be Used for All Quantum-Describable Systems
    Found. Phys. (IF 1.437) Pub Date : 2020-04-08
    Pierre Uzan

    This paper shows that the Clauser–Horne–Shimony–Holt test of locality of correlations which was originally designed to be used with binary observables can actually be used for any couples of quantum-like bounded continuous observables, and then for any experimental situation describable within the mathematical framework of quantum theory.

    更新日期:2020-04-08
  • The Doppler Effect and the Anisotropy of the Speed of Light
    Found. Phys. (IF 1.437) Pub Date : 2020-04-04
    Michał Drągowski; Marta Włodarczyk

    Fundamental incompatibility arises at the interface of quantum mechanics and the special theory of relativity with Einstein synchronization, in which simultaneity is not absolute. It has, however, been shown that a relativistic theory preserving absolute simultaneity allows to formulate Lorentz-covariant quantum theory, at a price of introducing a preferred frame of reference manifesting itself in

    更新日期:2020-04-04
  • Polarization of Vacuum Fluctuations: Source of the Vacuum Permittivity and Speed of Light
    Found. Phys. (IF 1.437) Pub Date : 2020-03-27
    G. B. Mainland; Bernard Mulligan

    There are two types of fluctuations in the quantum vacuum: type 1 vacuum fluctuations are on shell and can interact with matter in specific, limited ways that have observable consequences; type 2 vacuum fluctuations are off shell and cannot interact with matter. A photon will polarize a type 1, bound, charged lepton–antilepton vacuum fluctuation in much the same manner that it would polarize a dielectric

    更新日期:2020-03-27
  • New Perspectives on the Hole Argument
    Found. Phys. (IF 1.437) Pub Date : 2020-03-18
    Bryan W. Roberts; James Owen Weatherall

    This special issue of Foundations of Physics collects together articles representing some recent new perspectives on the hole argument in the history and philosophy of physics. Our task here is to introduce those new perspectives.

    更新日期:2020-03-18
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