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Interpreting Quantum Theories$
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Laura Ruetsche

Print publication date: 2011

Print ISBN-13: 9780199535408

Published to Oxford Scholarship Online: September 2011

DOI: 10.1093/acprof:oso/9780199535408.001.0001

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Phenomenological Particle Notions

Phenomenological Particle Notions

(p.247) 11 Phenomenological Particle Notions
Interpreting Quantum Theories

Laura Ruetsche

Oxford University Press

This chapter considers another route to a particle interpretation of quantum field theory, one mediated by the existence of techniques (such as the use of Feynman diagrams to guide calculation) and explanations (such as the appeal to cosmological particle creation to account for decelerating cosmic expansion) best understood in terms of particles. Looking close at these techniques and explanations, the chapter argues that they rely on the presence of unitarily inequivalent representations, the very presence, Chapters 8 and 9 contended, that frustrates fundamental particle interpretation.

Keywords:   Haag's theorem, Feynman diagrams, the (ϕ4)2 theory, cosmological particle creation, unitary inequivalence, Fock space, particle, ontology, quantum field theory

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