Search results for 'time reversal' (try it on Scholar)

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  1.  13
    Matt Farr (2016). Causation and Time Reversal. British Journal for the Philosophy of Science.
    What would it be for a process to happen backwards in time? Would such a process involve different causal relations? It is common to understand the time reversal invariance of a physical theory in causal terms, such that whatever can happen forwards in time (according to the theory) can also happen backwards in time. This has led many to hold that time reversal symmetry is incompatible with the asymmetry of cause and effect. This (...)
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  2.  25
    Bryan W. Roberts (2016). Three Myths About Time Reversal in Quantum Theory. Philosophy of Science.
    Many have suggested that the transformation standardly referred to as `time reversal' in quantum theory is not deserving of the name. I argue on the contrary that the standard definition is perfectly appropriate, and is indeed forced by basic considerations about the nature of time in the quantum formalism.
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  3.  13
    Aleksey V. Ilyin (2016). The Born Rule and Time-Reversal Symmetry of Quantum Equations of Motion. Foundations of Physics 46 (7):845-851.
    It was repeatedly underlined in literature that quantum mechanics cannot be considered a closed theory if the Born Rule is postulated rather than derived from the first principles. In this work the Born Rule is derived from the time-reversal symmetry of quantum equations of motion. The derivation is based on a simple functional equation that takes into account properties of probability, as well as the linearity and time-reversal symmetry of quantum equations of motion. The derivation presented (...)
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  4.  15
    M. Castagnino, M. Gadella & O. Lombardi (2006). Time-Reversal, Irreversibility and Arrow of Time in Quantum Mechanics. Foundations of Physics 36 (3):407-426.
    The aim of this paper is to analyze time-asymmetric quantum mechanics with respect of its validity as a non time-reversal invariant, time-asymmetric theory as well as of its ability to determine an arrow of time.
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  5.  86
    John Earman (2002). What Time Reversal Invariance is and Why It Matters. International Studies in the Philosophy of Science 16 (3):245 – 264.
    David Albert's Time and Chance (2000) provides a fresh and interesting perspective on the problem of the direction of time. Unfortunately, the book opens with a highly non-standard exposition of time reversal invariance that distorts the subsequent discussion. The present article not only has the remedial goal of setting the record straight about the meaning of time reversal invariance, but it also aims to show how the niceties of this symmetry concept matter to the (...)
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  6. Frank Arntzenius & Hilary Greaves (2009). Time Reversal in Classical Electromagnetism. British Journal for the Philosophy of Science 60 (3):557-584.
    Richard Feynman has claimed that anti-particles are nothing but particles `propagating backwards in time'; that time reversing a particle state always turns it into the corresponding anti-particle state. According to standard quantum field theory textbooks this is not so: time reversal does not turn particles into anti-particles. Feynman's view is interesting because, in particular, it suggests a nonstandard, and possibly illuminating, interpretation of the CPT theorem. In this paper, we explore a classical analog of Feynman's view, (...)
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  7. David Malament (2004). On the Time Reversal Invariance of Classical Electromagnetic Theory. Studies in History and Philosophy of Science Part B 35 (2):295-315.
    David Albert claims that classical electromagnetic theory is not time reversal invariant. He acknowledges that all physics books say that it is, but claims they are ``simply wrong" because they rely on an incorrect account of how the time reversal operator acts on magnetic fields. On that account, electric fields are left intact by the operator, but magnetic fields are inverted. Albert sees no reason for the asymmetric treatment, and insists that neither field should be inverted. (...)
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  8.  79
    Jill North (2008). Two Views on Time Reversal. Philosophy of Science 75 (2):201-223.
    In a recent paper, Malament (2004) employs a time reversal transformation that differs from the standard one, without explicitly arguing for it. This is a new and important understanding of time reversal that deserves arguing for in its own right. I argue that it improves upon the standard one. Recent discussion has focused on whether velocities should undergo a time reversal operation. I address a prior question: What is the proper notion of time (...)
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  9.  56
    Valia Allori (2015). Maxwell's Paradox: The Metaphysics of Classical Electrodynamics and its Time-Reversal Invariance. Analytica 1:1-19.
    In this paper, I argue that the recent discussion on the time - reversal invariance of classical electrodynamics (see (Albert 2000: ch.1), (Arntzenius 2004), (Earman 2002), (Malament 2004),(Horwich 1987: ch.3)) can be best understood assuming that the disagreement among the various authors is actually a disagreement about the metaphysics of classical electrodynamics. If so, the controversy will not be resolved until we have established which alternative is the most natural. It turns out that we have a paradox, namely (...)
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  10.  86
    E. C. G. Sudarshan & L. C. Biedenharn (1995). Time Reversal for Systems with Internal Symmetry. Foundations of Physics 25 (1):139-143.
    Wigner time reversal implemented by antiunitary transformations on the wavefunctions is to be refined if we are to deal with systems with internal symmetry. The necessary refinements are formulated. Application to a number of physical problems is made with some unexpected revelations about some popular models.
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  11.  44
    Frank Arntzenius (2004). Time Reversal Operations, Representations of the Lorentz Group, and the Direction of Time. Studies in History and Philosophy of Science Part B 35 (1):31-43.
    A theory is usually said to be time reversible if whenever a sequence of states S 1 , S 2 , S 3 is possible according to that theory, then the reverse sequence of time reversed states S 3 T , S 2 T , S 1 T is also possible according to that theory; i.e., one normally not only inverts the sequence of states, but also operates on the states with a time reversal operator T (...)
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  12.  30
    Daniel Peterson (2015). Prospects for a New Account of Time Reversal. Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 49:42-56.
    In this paper I draw the distinction between intuitive and theory-relative accounts of the time reversal symmetry and identify problems with each. I then propose an alternative to these two types of accounts that steers a middle course between them and minimizes each account’s problems. This new account of time reversal requires that, when dealing with sets of physical theories that satisfy certain constraints, we determine all of the discrete symmetries of the physical laws we are (...)
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  13.  21
    Leah Henderson (2014). Can the Second Law Be Compatible with Time Reversal Invariant Dynamics? Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 47:90-98.
    It is commonly thought that there is some tension between the second law of thermodynam- ics and the time reversal invariance of the microdynamics. Recently, however, Jos Uffink has argued that the origin of time reversal non-invariance in thermodynamics is not in the second law. Uffink argues that the relationship between the second law and time reversal invariance depends on the formulation of the second law. He claims that a recent version of the second (...)
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  14.  39
    Mario Castagnino, Manuel Gadella & Olimpia Lombardi, Time-Reversal Invariance and Irreversibility in Time-Asymmetric Quantum Mechanics.
    The aim of this paper is to analyze the concepts of time-reversal invariance and irreversibility in the so-called 'time-asymmetric quantum mechanics'. We begin with pointing out the difference between these two concepts. On this basis, we show that irreversibility is not as tightly linked to the semigroup evolution laws of the theory -which lead to its non time-reversal invariance- as usually suggested. In turn, we argue that the irreversible evolutions described by the theory are coarse-grained (...)
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  15.  14
    E. J. Post (1979). The Logic of Time Reversal. Foundations of Physics 9 (1-2):129-161.
    Active time reversal in the sense of “object reversal” and passive time reversal in the sense of a frame reversal of time are discussed separately and then together so as to bring out their dual nature. An understanding of that duality makes it unavoidable to contrast symmetry properties of matter with symmetry properties to be assigned to antimatter. Only frame reversal of time can “see” all conceivable active time reversals relevant (...)
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  16.  9
    A. O. Barut (1983). On Conservation of Parity and Time Reversal and Composite Models of Particles. Foundations of Physics 13 (1):7-12.
    We show that it is possible to consider parity and time reversal, as basic geometric symmetry operations, as being absolutely conserved. The observations of symmetry-violating pseudoscalar quantities can be attributed to the fact that some particles, due to their internal structure, are not eigenstates of parity or CP, and there is no reason that they should be. In terms of a model it is shown how, in spite of this, pseudoscalar terms are small in strong interactions. The neutrino (...)
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  17.  7
    Sun-Tak Hwang (1972). A New Interpretation of Time Reversal. Foundations of Physics 2 (4):315-326.
    A new interpretation of the time-reversal invariance principle is given. As a result, it is shown that microscopic dynamic reversibility has no basis in physics. The existing contradiction between one-way time and two-way time is reconciled. It is also pointed out that the common notion that clocks run backwards when time is reversed is wrong.
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  18. Robert C. Bishop (2005). Quantum Time Arrows, Semigroups and Time-Reversal in Scattering. International Journal of Theoretical Physics:723-733.
    Two approaches toward the arrow of time for scattering processes have been proposed in rigged Hilbert space quantum mechanics. One, due to Arno Bohm, involves preparations and registrations in laboratory operations and results in two semigroups oriented in the forward direction of time. The other, employed by the Brussels-Austin group, is more general, involving excitations and de-excitations of systems, and apparently results in two semigroups oriented in opposite directions of time. It turns out that these two (...) arrows can be related to each other via Wigner's extensions of the spacetime symmetry group. Furthermore, their are subtle differences in causality as well as the possibilities for the existence and creation of time-reversed states depending on which time arrow is chosen. (shrink)
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  19.  8
    Mario Bunge (1972). Time Asymmetry, Time Reversal, and Irreversibility. In J. T. Fraser, F. Haber & G. Muller (eds.), The Study of Time. Springer-Verlag 122--130.
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  20. Suchoon S. Mo (1990). Time Reversal in Human Cognition: Search for a Temporal Theory of Insanity. In Richard A. Block (ed.), Cognitive Models of Psychological Time. Lawrence Erlbaum 241--254.
     
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  21. Paul Weingartner (2006). Are the Laws of Nature Time Reversal Symmetric?: The Arrow of Time, or Better: The Arrow of Directional Processes. In Michael Stöltzner & Friedrich Stadler (eds.), Time and History: Proceedings of the 28. International Ludwig Wittgenstein Symposium, Kirchberg Am Wechsel, Austria 2005. De Gruyter 289-300.
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  22. Harald Atmanspacher, Mind and Matter as Asymptotically Disjoint, Inequivalent Representations with Broken Time-Reversal Symmetry.
    body. While the latter areas are discussed mainly in fields such as the philosophy of mind, cognitive Many philosophical and scientific discussions of top-.
     
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  23.  73
    Craig Callender (1995). The Metaphysics of Time Reversal: Hutchison on Classical Mechanics. British Journal for the Philosophy of Science 46 (3):331-340.
  24. Steven F. Savitt (1994). Is Classical Mechanics Time Reversal Invariant? British Journal for the Philosophy of Science 45 (3):907-913.
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  25.  20
    Stephen Leeds (2006). Discussion: Malament on Time Reversal. Philosophy of Science 73 (4):448-458.
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  26. F. J. Belinfante (1979). Measurements and Time Reversal in Objective Quantum Theory. British Journal for the Philosophy of Science 30 (2):187-191.
     
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  27.  48
    Murray Macbeath (1983). Communication and Time Reversal. Synthese 56 (1):27 - 46.
  28.  15
    Arno Bohm & Sujeewa Wickramasekara (1997). The Time Reversal Operator for Semigroup Evolutions. Foundations of Physics 27 (7):969-993.
  29.  23
    C. T. K. Chari (1963). Time Reversal, Information Theory, and "World-Geometry". Journal of Philosophy 60 (20):579-583.
  30.  2
    Frank Arntzenius (2004). Time Reversal Operations, Representations of the Lorentz Group, and the Direction of Time. Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 35 (1):31-43.
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  31.  1
    David B. Malament (2004). On the Time Reversal Invariance of Classical Electromagnetic Theory. Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 35 (2):295-315.
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  32. Harvey R. Brown (1979). ELINFANTE, F. J.: "Measurements and Time Reversal in Objective Quantum Theory". [REVIEW] British Journal for the Philosophy of Science 30:187.
     
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  33.  35
    Stephen Crocker (2001). Into the Interval: On Deleuze's Reversal of Time and Movement. Continental Philosophy Review 34 (1):45-67.
    The reversal in the relation of time and movement which Deleuze describes in his Cinema books does not only concern a change in the filmic arts. Deleuze associates it with a wider Copernican turn in science, philosophy, art and indeed modern experience as a whole. Experience no longer consists of an idea plus the time it takes to realize it. Instead, time is implicated in the determination, literally the creation of the terminus of any movement of (...)
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  34. Matt Farr & Alexander Reutlinger (2013). A Relic of a Bygone Age? Causation, Time Symmetry and the Directionality Argument. Erkenntnis 78 (2):215-235.
    Bertrand Russell famously argued that causation is not part of the fundamental physical description of the world, describing the notion of cause as “a relic of a bygone age”. This paper assesses one of Russell’s arguments for this conclusion: the ‘Directionality Argument’, which holds that the time symmetry of fundamental physics is inconsistent with the time asymmetry of causation. We claim that the coherence and success of the Directionality Argument crucially depends on the proper interpretation of the ‘ (...)
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  35.  16
    John G. Cramer (1988). Velocity Reversal and the Arrows of Time. Foundations of Physics 18 (12):1205-1212.
    Agendanken experiment is proposed for distinguishing between two models accounting for the macroscopic arrow of time. The experiment involves the veloeity revesal of components of an isolated system, and the two models give contrasting predictions as to its behavior.
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  36.  2
    E. Scott Geller, Charles P. Whitman, Richard F. Wrenn & William G. Shipley (1971). Expectancy and Discrete Reaction Time in a Probability Reversal Design. Journal of Experimental Psychology 90 (1):113.
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  37.  6
    Dick J. Bierman & D. I. Radin (1999). Conscious and Anomalous Non-Conscious Emotional Processes: A Reversal of the Arrow of Time. In S. Hameroff, A. Kaszniak & David Chalmers (eds.), Toward a Science of Consciousness Iii: The Third Tucson Discussions and Debates. MIT Press 367--385.
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  38. David Z. Albert (2000). Time and Chance. Harvard University Press.
    This book is an attempt to get to the bottom of an acute and perennial tension between our best scientific pictures of the fundamental physical structure of the ...
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  39.  26
    K. B. Wharton (2007). Time-Symmetric Quantum Mechanics. Foundations of Physics 37 (1):159-168.
    A time-symmetric formulation of nonrelativistic quantum mechanics is developed by applying two consecutive boundary conditions onto solutions of a time- symmetrized wave equation. From known probabilities in ordinary quantum mechanics, a time-symmetric parameter P0 is then derived that properly weights the likelihood of any complete sequence of measurement outcomes on a quantum system. The results appear to match standard quantum mechanics, but do so without requiring a time-asymmetric collapse of the wavefunction upon measurement, thereby realigning quantum (...)
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  40.  88
    Bryan W. Roberts (2013). The Simple Failure of Curie's Principle. Philosophy of Science 80 (4):579-592.
    I point out a simple sense in which the standard formulation of Curie’s principle is false when the symmetry transformation it describes is time reversal.
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  41.  10
    Carlo Rovelli (2016). An Argument Against the Realistic Interpretation of the Wave Function. Foundations of Physics 46 (10):1229-1237.
    Testable predictions of quantum mechanics are invariant under time reversal. But the evolution of the quantum state in time is not so, neither in the collapse nor in the no-collapse interpretations of the theory. This is a fact that challenges any realistic interpretation of the quantum state. On the other hand, this fact raises no difficulty if we interpret the quantum state as a mere calculation device, bookkeeping past real quantum events.
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  42.  41
    Bryan W. Roberts (2012). Kramers Degeneracy Without Eigenvectors. Physical Review A 86 (3):034103.
    Wigner gave a well-known proof of Kramers degeneracy, for time reversal invariant systems containing an odd number of half-integer spin particles. But Wigner's proof relies on the assumption that the Hamiltonian has an eigenvector, and thus does not apply to many quantum systems of physical interest. This note illustrates an algebraic way to talk about Kramers degeneracy that does not appeal to eigenvectors, and provides a derivation of Kramers degeneracy in this more general context.
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  43.  29
    Jos Uffink & Giovanni Valente (2015). Lanford’s Theorem and the Emergence of Irreversibility. Foundations of Physics 45 (4):404-438.
    It has been a longstanding problem to show how the irreversible behaviour of macroscopic systems can be reconciled with the time-reversal invariance of these same systems when considered from a microscopic point of view. A result by Lanford shows that, under certain conditions, the famous Boltzmann equation, describing the irreversible behaviour of a dilute gas, can be obtained from the time-reversal invariant Hamiltonian equations of motion for the hard spheres model. Here, we examine how and in (...)
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  44.  67
    Gustavo E. Romero & Daniela Pérez (2011). Time and Irreversibility in an Accelerating Universe. International Journal of Modern Physics D 20:2831-2838.
    It is a remarkable fact that all processes occurring in the observable universe are irre- versible, whereas the equations through which the fundamental laws of physics are formu- lated are invariant under time reversal. The emergence of irreversibility from the funda- mental laws has been a topic of consideration by physicists, astronomers and philosophers since Boltzmann's formulation of his famous \H" theorem. In this paper we shall discuss some aspects of this problem and its connection with the dynamics (...)
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  45.  52
    Mario Castagnino & Olimpia Lombardi (2009). The Global Non-Entropic Arrow of Time: From Global Geometrical Asymmetry to Local Energy Flow. Synthese 169 (1):1 - 25.
    Since the nineteenth century, the problem of the arrow of time has been traditionally analyzed in terms of entropy by relating the direction past-to-future to the gradient of the entropy function of the universe. In this paper, we reject this traditional perspective and argue for a global and non-entropic approach to the problem, according to which the arrow of time can be defined in terms of the geometrical properties of spacetime. In particular, we show how the global non-entropic (...)
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  46.  43
    Joan A. Vaccaro (2011). T Violation and the Unidirectionality of Time. Foundations of Physics 41 (10):1569-1596.
    An increasing number of experiments at the Belle, BNL, CERN, DAΦNE and SLAC accelerators are confirming the violation of time reversal invariance (T). The violation signifies a fundamental asymmetry between the past and future and calls for a major shift in the way we think about time. Here we show that processes which violate T symmetry induce destructive interference between different paths that the universe can take through time. The interference eliminates all paths except for two (...)
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  47.  43
    Carlo Rovelli (2004). Comment On: “Causality and the Arrow of Classical Time”, by Fritz Rohrlich. Studies in History and Philosophy of Science Part B 35 (3):397-405.
    Rohrlich claims that “the problem of the arrow of time in classical dynamics has been solved”. The solution he proposes is based on the equations governing the motion of extended particles. Rohrlich claims that these equations, which must take self-interaction into account, are not invariant under time reversal. I dispute this claim, on several grounds.
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  48.  9
    Martin Land (2005). Discrete Symmetries of Off-Shell Electromagnetism. Foundations of Physics 35 (7):1263-1288.
    This paper discusses the discrete symmetries of off-shell electromagnetism, the Stueckelberg–Schrodinger relativistic quantum theory and its associated 5D local gauge theory. Seeking a dynamical description of particle/antiparticle interactions, Stueckelberg developed a covariant mechanics with a monotonically increasing Poincaré-invariant parameter. In Stueckelberg’s framework, worldlines are traced out through the parameterized evolution of spacetime events, which may advance or retreat with respect to the laboratory clock, depending on the sign of the energy, so that negative energy trajectories appear as antiparticles when the (...)
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  49.  33
    Bryan W. Roberts (2012). Time, Symmetry and Structure: A Study in the Foundations of Quantum Theory. Pittsburgh D-Scholarship Dissertation.
    This dissertation is about the sense in which the laws of quantum theory distinguish between the past and the future. I begin with an account of what it means for quantum theory to make such a distinction, by providing a novel derivation of the meaning of "time reversal." I then show that if Galilei invariant quantum theory does distinguish a preferred direction in time, then this has consequences for the ontology of the theory. In particular, it requires (...)
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  50.  46
    Craig Callender (2000). Is Time 'Handed' in a Quantum World? Proceedings of the Aristotelian Society 100 (1):247-269.
    This paper considers the possibility that nonrelativistic quantum mechanics tells us that Nature cares about time reversal. In a classical world we have a fundamentally reversible world that appears irreversible at higher levels, e.g., the thermodynamic level. But in a quantum world we see, if I am correct, a fundamentally irreversible world that appears reversible at higher levels, e.g., the level of classical mechanics. I consider two related symmetries, time reversal invariance and what I call ‘Wigner (...)
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