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Many Worlds?: Everett, Quantum Theory, and Reality

Simon Saunders, Jonathan Barrett, Adrian Kent, and David Wallace (eds)

Published in print:
2010
Published Online:
September 2010
ISBN:
9780199560561
eISBN:
9780191721380
Item type:
book
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199560561.001.0001
Subject:
Philosophy, Metaphysics/Epistemology, Philosophy of Science

What does realism about the quantum state imply? What follows when quantum theory is applied without restriction, if need be, to the whole universe? These are the questions which are debated in this ... More


Uncertainty, Possibility, and Identity

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0010
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

This chapter considers some philosophical problems posed by the Everett interpretation: should someone expecting to undergo quantum-mechanical branching be uncertain about the result of that ... More


The Paradox of Measurement

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0002
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

After an initial discussion of the general aims of scientific theories, the quantum measurement problem is presented. Non-Everettian solutions to the problem are briefly discussed; the aim of the ... More


Everett and Wheeler: the Untold Story

Peter Byrne

in Many Worlds?: Everett, Quantum Theory, and Reality

Published in print:
2010
Published Online:
September 2010
ISBN:
9780199560561
eISBN:
9780191721380
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199560561.003.0021
Subject:
Philosophy, Metaphysics/Epistemology, Philosophy of Science

In the beginning, Wheeler was Everett's champion. But in the end he rejected his proposal. This chapter tells this story and discusses the views of Bohr and others on Everett's ideas.


The Probability Puzzle

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0006
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

This chapter begins my discussion of probability — generally held to be the most severe difficulty for the Everett interpretation. The chapter argues that since mathematically speaking probability ... More


Many Worlds

Jeffrey Alan Barrett

in The Quantum Mechanics of Minds and Worlds

Published in print:
2001
Published Online:
March 2012
ISBN:
9780199247431
eISBN:
9780191697661
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199247431.003.0006
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

This chapter explains the many-worlds interpretations, particularly the DeWitt–Graham interpretation — the splitting-worlds interpretation. The splitting-worlds theory proposes that one must choose ... More


Chaos, Decoherence, and Branching

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0004
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

This chapter is concerned with the technical details of how emergent branching occurs in the Everett interpretation. Accordingly, its focus is on decoherence theory, the branch of quantum physics ... More


Spacetime and the Quantum State

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0011
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

How is the microscopic ontology of quantum mechanics to be understood according to the Everett interpretation? And how, in particular, are we to understand concepts like spatial locality in ... More


A Cornucopia of Everettian Consequences

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0013
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

This chapter reviews a collection of other philosophical and conceptual consequences of the Everett interpretation: the popular-science idea that chaos theory makes the future sensitively dependent ... More


The Emergence of Multiplicity

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0003
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

The aim of this chapter is to explain how the ‘many worlds’ of the Everett interpretation can emerge from the underlying physics of quantum theory, without being put in by hand at the microscopic ... More


First Interlude

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0005
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

This interlude considers, in dialog form, various objections and responses to the Everett interpretation, and in particular to the view developed in chapters 1–3 of of this book. (Problems of ... More


The Directions of Branching and the Direction of Time

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0012
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

quantum-mechanical branching is a time-directed process, while the underlying equations of quantum theory admit no preferred direction of time. The chapter demonstrates that this apparent ... More


Symmetry, Rationality, and the Born Rule

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0007
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

Building on work originally carried out by David Deutsch, the chapter develops a mathematically rigorous framework for discussing the quantum probability rule in terms of the preferences between ... More


Everettian Statistical Inference

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0008
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

This chapter extends chapter 5's formal proof into a general discussion of how we should assess evidence — and, in particular, how we should test scientific theories — given the possibility that ... More


Second Interlude

David Wallace

in The Emergent Multiverse: Quantum Theory according to the Everett Interpretation

Published in print:
2012
Published Online:
September 2012
ISBN:
9780199546961
eISBN:
9780191741418
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199546961.003.0009
Subject:
Philosophy, Philosophy of Science, Metaphysics/Epistemology

This interlude considers, in dialog form, various objections and responses to Everett interpretation based on concerns of probability, further exploring the position developed in chapters 4–6 of this ... More


Determinism

Peter J. Lewis

in Quantum Ontology: A Guide to the Metaphysics of Quantum Mechanics

Published in print:
2016
Published Online:
August 2016
ISBN:
9780190469825
eISBN:
9780190469849
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780190469825.003.0006
Subject:
Philosophy, Metaphysics/Epistemology, Philosophy of Science

The most common metaphysical consequence claimed of quantum mechanics is indeterminism. But while the GRW theory is indeterministic, Bohm’s theory is fully deterministic. The many-worlds theory is ... More


Underdetermination

Peter J. Lewis

in Quantum Ontology: A Guide to the Metaphysics of Quantum Mechanics

Published in print:
2016
Published Online:
August 2016
ISBN:
9780190469825
eISBN:
9780190469849
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780190469825.003.0003
Subject:
Philosophy, Metaphysics/Epistemology, Philosophy of Science

This chapter considers the worry that, rather than there being no description of the microworld available, there may be several competing descriptions. The problematic role of measurement in standard ... More


Six Quantum Worlds

Peter J. Lewis

in Quantum Ontology: A Guide to the Metaphysics of Quantum Mechanics

Published in print:
2016
Published Online:
August 2016
ISBN:
9780190469825
eISBN:
9780190469849
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780190469825.003.0009
Subject:
Philosophy, Metaphysics/Epistemology, Philosophy of Science

The foundations of quantum mechanics are so contested that it yields few definitive answers to metaphysical questions. So the best we can do is to lay out the various possibilities. The six ... More


Indeterminacy

Peter J. Lewis

in Quantum Ontology: A Guide to the Metaphysics of Quantum Mechanics

Published in print:
2016
Published Online:
August 2016
ISBN:
9780190469825
eISBN:
9780190469849
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780190469825.003.0004
Subject:
Philosophy, Metaphysics/Epistemology, Philosophy of Science

It is often claimed that quantum mechanics entails that there is indeterminacy in the world, in the sense that physical systems can lack a precise value for a property. Indeed, a radical form of ... More


Time, Chance, and the Necessity of Everything

Alexander Bird

in Chance and Temporal Asymmetry

Published in print:
2014
Published Online:
November 2014
ISBN:
9780199673421
eISBN:
9780191782534
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199673421.003.0014
Subject:
Philosophy, Metaphysics/Epistemology, Philosophy of Science

There is no contingency in the world. This chapter shows how premises that all have some plausibility in metaphysics and physics lead to this conclusion, that every true proposition is necessarily ... More


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