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Philosophical Aspects of Quantum Field Theory: I
Author(s) -
Ruetsche Laura
Publication year - 2012
Publication title -
philosophy compass
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.973
H-Index - 25
ISSN - 1747-9991
DOI - 10.1111/j.1747-9991.2011.00388.x
Subject(s) - quantum field theory , locality , uniqueness , field (mathematics) , theoretical physics , epistemology , principle of locality , quantum , causality (physics) , physics , mathematics , philosophy , quantum mechanics , quantum nonlocality , pure mathematics , quantum entanglement , mathematical analysis , linguistics
Abstract This is the first of a two‐part introduction to some interpretive questions that arise in connection with quantum field theories (QFTs). Some of these questions are continuous with those familiar from the discussion of ordinary non‐relativistic quantum mechanics (QM). For example, questions about locality can be rigorously posed and fruitfully pursued within the framework of QFT. A stark disanalogy between QFTs and ordinary QM – the former, but not the latter, typically admit infinitely many putatively physically inequivalent realizations – prompts relatively novel questions, questions about how to understand and adjudicate different strategies for equipping quantum theories with content. Part I sketches the fate of locality and related notions in QFT, then documents the non‐uniqueness unprecedented in ordinary QM but rampant in QFT. Part II presents foundations issues raised by non‐uniqueness.