Quantum Mechanics on Spacetime I: Spacetime State Realism

Abstract
What ontology does realism about the quantum state suggest? The main extant view in contemporary philosophy of physics is wave-function realism . We elaborate the sense in which wave-function realism does provide an ontological picture, and defend it from certain objections that have been raised against it. However, there are good reasons to be dissatisfied with wave-function realism, as we go on to elaborate. This motivates the development of an opposing picture: what we call spacetime state realism , a view which takes the states associated to spacetime regions as fundamental. This approach enjoys a number of beneficial features, although, unlike wave-function realism, it involves non-separability at the level of fundamental ontology. We investigate the pros and cons of this non-separability, arguing that it is a quite acceptable feature, even one which proves fruitful in the context of relativistic covariance. A companion paper discusses the prospects for combining a spacetime-based ontology with separability, along lines suggested by Deutsch and Hayden
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DOI 10.1093/bjps/axq010
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References found in this work BETA
Life in Configuration Space.Peter J. Lewis - 2004 - British Journal for the Philosophy of Science 55 (4):713-729.
Against Pointillisme About Mechanics.Jeremy Butterfield - 2006 - British Journal for the Philosophy of Science 57 (4):709-753.
Relativistic Quantum Becoming.Wayne C. Myrvold - 2003 - British Journal for the Philosophy of Science 54 (3):475-500.

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Citations of this work BETA
Building the World From its Fundamental Constituents.L. A. Paul - 2012 - Philosophical Studies 158 (2):221-256.
Quantum Mechanics and the Plight of Physicalism.Fernando Birman - 2009 - Journal for General Philosophy of Science / Zeitschrift für Allgemeine Wissenschaftstheorie 40 (2):207-225.
A Dilemma for the Emergence of Spacetime in Canonical Quantum Gravity.Vincent Lam & Michael Esfeld - 2012 - Studies in History and Philosophy of Modern Physics 44 (3):286-293.
What is a Wavefunction?Wayne C. Myrvold - 2015 - Synthese 192 (10):3247-3274.
The Entanglement Structure of Quantum Field Systems.Vincent Lam - 2013 - International Studies in the Philosophy of Science 27 (1):59 - 72.

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