7 found
James D. Fraser [5]James Duncan Fraser [2]
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James Fraser
University of Wuppertal
  1.  82
    The Real Problem with Perturbative Quantum Field Theory.James D. Fraser - 2020 - British Journal for the Philosophy of Science 71 (2):391-413.
    The perturbative approach to quantum field theory has long been viewed with suspicion by philosophers of science. This article offers a diagnosis of its conceptual problems. Drawing on Norton’s discussion of the notion of approximation I argue that perturbative QFT ought to be understood as producing approximations without specifying an underlying QFT model. This analysis leads to a reassessment of common worries about perturbative QFT. What ends up being the key issue with the approach on this picture is not mathematical (...)
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  2.  63
    Renormalization and the Formulation of Scientific Realism.James Duncan Fraser - 2018 - Philosophy of Science 85 (5):1164-1175.
    Providing a precise statement of their position has long been a central challenge facing the scientific realist. This paper draws some morals about how realism ought to be formulated from the renormalization group framework in high energy physics.
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  3. Toward a realist view of quantum field theory.James D. Fraser - 2020 - In Steven French & Juha Saatsi (eds.), Scientific Realism and the Quantum. Oxford: Oxford University Press.
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  4.  54
    Knowledge of the Quantum Domain: An Overlap Strategy.James Duncan Fraser & Peter Vickers - forthcoming - British Journal for the Philosophy of Science.
  5.  51
    Spontaneous Symmertry Breaking in Finite Systems.James D. Fraser - 2016 - Philosophy of Science 83 (4):585-605.
    The orthodox characterization of spontaneous symmetry breaking in statistical mechanics appeals to novel properties of systems with infinite degrees of freedom, namely, the existence of multiple equilibrium states. This raises the same puzzles about the status of the thermodynamic limit fueling recent debates about phase transitions. I argue that there are prospects of explaining the success of the standard approach to SSB in terms of the properties of large finite systems. Consequently, despite initial appearances, the need to account for SSB (...)
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  6.  20
    The twin origins of renormalization group concepts.James D. Fraser - 2021 - Studies in History and Philosophy of Science Part A 89 (C):114-128.
  7.  32
    Taking approximations seriously: The cases of the Chew and Nambu-Jona-Lasinio models.Pablo Ruiz de Olano, James D. Fraser, Rocco Gaudenzi & Alexander S. Blum - 2022 - Studies in History and Philosophy of Science Part A 93 (C):82-95.
    In this article, we offer a detailed study of two important episodes in the early history of high-energy physics, namely the development of the Chew and the Nambu-Jona-Lasinio models. Our study reveals that both models resulted from the combination of an old Hamiltonian, which had been introduced by earlier researchers, and two new approximation methods developed by Chew and by Nambu and Jona-Lasinio. These new approximation methods, furthermore, were the key component behind the models’ success. We take this historical investigation (...)
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