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The Conceptual Framework of Quantum Field Theory$
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Anthony Duncan

Print publication date: 2012

Print ISBN-13: 9780199573264

Published to Oxford Scholarship Online: January 2013

DOI: 10.1093/acprof:oso/9780199573264.001.0001

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Dynamics VI: The classical limit of quantum fields

Dynamics VI: The classical limit of quantum fields

(p.219) 8 Dynamics VI: The classical limit of quantum fields
The Conceptual Framework of Quantum Field Theory

Anthony Duncan

Oxford University Press

This chapter examines the question of the classical limit of quantum fields. It discusses the mutual measurability of field observables, and the types of states of the field for which quasi-classical behaviour is recovered. It also considers the energetic stability of quantum field theories, and addresses the related phenomenon of spontaneous symmetry-breaking.

Keywords:   classical limits, quantum field theory, energetic stability, symmetry breaking

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