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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


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


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


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.


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


The Existence of the Primordial God

Peter Forrest

in Developmental Theism: From Pure Will to Unbounded Love

Published in print:
2007
Published Online:
May 2010
ISBN:
9780199214587
eISBN:
9780191706523
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199214587.003.0006
Subject:
Philosophy, Aesthetics, Philosophy of Religion

This chapter presents a case for the existence of the neoclassical Primordial God. First, we should either reject reductive materialism or at least not have confidence in it. Hence, we should attach ... 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


Skeletons in the cupboard

A. J. Leggett

in The Problems of Physics

Published in print:
2006
Published Online:
September 2007
ISBN:
9780199211241
eISBN:
9780191706837
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199211241.003.0005
Subject:
Physics, Particle Physics / Astrophysics / Cosmology

This chapter discusses three fundamental questions which the majority of the physics community believes are not worthy of attention and a minority believes are crucial and in urgent need 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


Introduction: How to Avoid the G-Word

Mary-Jane Rubenstein

in Worlds Without End: The Many Lives of the Multiverse

Published in print:
2014
Published Online:
November 2015
ISBN:
9780231156622
eISBN:
9780231527422
Item type:
chapter
Publisher:
Columbia University Press
DOI:
10.7312/columbia/9780231156622.003.0001
Subject:
Philosophy, Philosophy of Science

This introductory chapter presents the book’s fourfold task, which consists of providing a historical account of the workings of multiple-world cosmologies; outlining contemporary standards of the ... More


Ascending to the Ultimate Multiverse

Mary-Jane Rubenstein

in Worlds Without End: The Many Lives of the Multiverse

Published in print:
2014
Published Online:
November 2015
ISBN:
9780231156622
eISBN:
9780231527422
Item type:
chapter
Publisher:
Columbia University Press
DOI:
10.7312/columbia/9780231156622.003.0007
Subject:
Philosophy, Philosophy of Science

This chapter discusses the possible existence of a multiverse, which stemmed from Hugh Everett’s Many-Worlds Interpretation (MWI) of quantum mechanics. According to the law of quantum mechanics, a ... More


Diverging Everettian Quantum Mechanics

Alastair Wilson

in The Nature of Contingency: Quantum Physics as Modal Realism

Published in print:
2020
Published Online:
March 2020
ISBN:
9780198846215
eISBN:
9780191881374
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198846215.003.0003
Subject:
Philosophy, Philosophy of Science

This chapter sets out the version of quantum mechanics—diverging EQM—that constitutes the physics component of quantum modal realism. After a potted history of Everettian quantum mechanics, and an ... More


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