{"title":"Reformulating Bell's theorem: The search for a truly local quantum theory","authors":"Mordecai Waegell , Kelvin J. McQueen","doi":"10.1016/j.shpsb.2020.02.006","DOIUrl":"10.1016/j.shpsb.2020.02.006","url":null,"abstract":"<div><p><span>The apparent nonlocality of quantum theory has been a persistent concern. Einstein et al. (1935) and Bell (1964) emphasized the apparent nonlocality arising from entanglement correlations. While some interpretations embrace this nonlocality, modern variations of the Everett-inspired many worlds interpretation try to circumvent it. In this paper, we review Bell's “no-go” theorem and explain how it rests on three axioms, </span><em>local causality</em>, <em>no superdeterminism</em>, and <em>one world</em>. Although Bell is often taken to have shown that <em>local causality</em> is ruled out by the experimentally confirmed entanglement correlations, we make clear that it is the conjunction of the three axioms that is ruled out by these correlations. We then show that by assuming <em>local causality</em> and <em>no superdeterminism</em>, we can give a direct proof of many worlds. The remainder of the paper searches for a consistent, local, formulation of many worlds. We show that prominent formulations whose ontology is given by the wave function violate <em>local causality</em><span>, and we critically evaluate claims in the literature to the contrary. We ultimately identify a local many worlds interpretation that replaces the wave function with a separable Lorentz-invariant wave-field. We conclude with discussions of the Born rule, and other interpretations of quantum mechanics.</span></p></div>","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"70 ","pages":"Pages 39-50"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2020.02.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46196230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"How to make reflectance a surface property","authors":"Nicholas Danne","doi":"10.1016/j.shpsb.2020.01.002","DOIUrl":"10.1016/j.shpsb.2020.01.002","url":null,"abstract":"","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"70 ","pages":"Pages 19-27"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2020.01.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47709836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Some Philosophical Prehistory of the (Earman-Norton) hole argument","authors":"James Owen Weatherall","doi":"10.1016/j.shpsb.2020.02.002","DOIUrl":"10.1016/j.shpsb.2020.02.002","url":null,"abstract":"<div><p>The <em>celu</em> of the philosophical literature on the hole argument is the 1987 paper by Earman & Norton [“What Price Space-time Substantivalism? The Hole Story” <em>Br. J. Phil. Sci</em>]. This paper has a well-known back-story, concerning work by Stachel and Norton on Einstein's thinking in the years 1913–15. Less well-known is a connection between the hole argument and Earman's work on Leibniz in the 1970s and 1980s, which in turn can be traced to an argument first presented in 1975 by Howard Stein. Remarkably, this thread originates with a misattribution: the argument Earman attributes to Stein, which ultimately morphs into the hole argument, was not the argument Stein gave. The present paper explores this episode and presents some reflections on how it bears on the subsequent literature.</p></div>","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"70 ","pages":"Pages 79-87"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2020.02.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72959184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Redundant epistemic symmetries","authors":"James Read, Thomas Møller-Nielsen","doi":"10.1016/j.shpsb.2020.03.002","DOIUrl":"10.1016/j.shpsb.2020.03.002","url":null,"abstract":"<div><p>We undertake a detailed analysis of three ‘epistemic’ approaches to symmetries, due, respectively, to Ismael and van Fraassen, Caulton, and Dasgupta. Finding faults with each, we proceed to develop our own epistemic approach to symmetries. Having done so, we present a concern regarding all epistemic accounts: they render the notion of a symmetry transformation redundant as a tool for metaphysical theorising about scientific theories.</p></div>","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"70 ","pages":"Pages 88-97"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2020.03.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47680951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The metaphysics of invariance","authors":"David Schroeren","doi":"10.1016/j.shpsb.2020.02.001","DOIUrl":"10.1016/j.shpsb.2020.02.001","url":null,"abstract":"<div><p>Fundamental physics contains an important link between properties of elementary particles and continuous symmetries of particle systems. For example, properties such as mass and spin are said to be 'associated' with specific continuous symmetries. This link has played a key role in the discovery of various new particle kinds, but more importantly: it is thought to provide a deep insight into the nature of physical reality.</p><p>The link between properties and symmetries has been said to call for a radical revision of perceived metaphysical orthodoxy. However, if we are to use claims about a link between properties and symmetries in the articulation of metaphysical views, we first need to develop a sufficiently precise understanding of the content of these claims. The goal of this paper is to do just that.</p></div>","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"70 ","pages":"Pages 51-64"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2020.02.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49407991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Diagnosing disagreements: The authentication of the positron 1931–1934","authors":"Ana-Maria Creţu","doi":"10.1016/j.shpsb.2019.10.001","DOIUrl":"10.1016/j.shpsb.2019.10.001","url":null,"abstract":"<div><p>This paper bridges a historiographical gap in accounts of the prediction and discovery of the positron by combining three ingredients. First, the prediction and discovery of the positron are situated in the broader context of a period of ‘crystallisation’ of a research tradition. Second, the prediction and discovery of the positron are discussed in the context of the ‘authentication’ of the particle. Third, the attitude of the relevant scientists to both prediction and discovery are conceptualised in terms of the idea of ‘perspectives’. It will be argued that by examining the prediction and discovery of the positron in the context of authentication within a period of crystallisation, we can better understand disagreements regarding the positron between relevant scientists (Dirac, Bohr, and Pauli) in the period 1931–34.</p></div>","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"70 ","pages":"Pages 28-38"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2019.10.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72597981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Frauchiger-Renner argument: A new no-go result?","authors":"Sebastian Fortin, Olimpia Lombardi","doi":"10.1016/j.shpsb.2019.12.002","DOIUrl":"10.1016/j.shpsb.2019.12.002","url":null,"abstract":"","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"70 ","pages":"Pages 1-7"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2019.12.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"55178347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Putting positrons into classical Dirac field theory","authors":"Charles T. Sebens","doi":"10.1016/j.shpsb.2019.10.003","DOIUrl":"10.1016/j.shpsb.2019.10.003","url":null,"abstract":"<div><p><span><span>One way of arriving at a quantum field theory of electrons and </span>positrons<span> is to take a classical theory of the Dirac field and then quantize. Starting with the standard classical field theory<span> and quantizing in the most straightforward way yields an inadequate quantum field theory. It is possible to fix this theory by making some modifications (such as redefining the operators for energy and charge). Here I argue that we ought to make these modifications earlier, revising the classical Dirac field theory that serves as the starting point for quantization (putting positrons into that theory and removing negative energies). Then, quantization becomes straightforward. Also, the physics of the Dirac field is made more similar to the physics of the </span></span></span>electromagnetic field<span> and we are able to better understand electron spin.</span></p></div>","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"70 ","pages":"Pages 8-18"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2019.10.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84159213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Histories, dynamical laws, and initial conditions −Invariance under time-reversibility and its failure in Markov processes, with application to the second law of thermodynamics and the past hypothesis","authors":"Elliott Sober","doi":"10.1016/j.shpsb.2019.08.004","DOIUrl":"10.1016/j.shpsb.2019.08.004","url":null,"abstract":"<div><p>A Markov process<span> can be invariant under time reversal and it also can exhibit a failure of invariance that is “uniformly positive.” I show how each of these possibilities contributes to the project of deciding when a temporal sequence of states has a higher probability than its mirror image. Neither suffices, but a distinct property of the Markov process completes the project, namely the unconditional probabilities of two possible states of the system at the start of the process. The concept of forward time-translational invariance plays a role in the analysis, but I discuss backward time-translational invariance as well. I argue that the Markov framework helps clarify how the Past Hypothesis (the hypothesis that the universe began in a very low entropy state) is related to the Second Law of Thermodynamics, and how each is relevant to explaining why histories that exhibit entropy increase have higher probabilities than histories that exhibit entropy decline. I argue that the Past Hypothesis, if true, helps explain this fact about histories, but a far weaker hypothesis about the universe's initial state suffices to do so.</span></p></div>","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"69 ","pages":"Pages 26-31"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2019.08.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47542920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sebastian De Haro , Jeroen van Dongen , Manus Visser , Jeremy Butterfield
{"title":"Conceptual analysis of black hole entropy in string theory","authors":"Sebastian De Haro , Jeroen van Dongen , Manus Visser , Jeremy Butterfield","doi":"10.1016/j.shpsb.2019.11.001","DOIUrl":"10.1016/j.shpsb.2019.11.001","url":null,"abstract":"<div><p>The microscopic state counting of the extremal Reissner-Nordström black hole performed by Andrew Strominger and Cumrun Vafa in 1996 has proven to be a central result in string theory. Here, with a philosophical readership in mind, the argument is presented in its contemporary context and its rather complex conceptual structure is analysed. In particular, we will identify the various inter-theoretic relations, such as duality and linkage relations, on which it depends. We further aim to make clear why the argument was immediately recognised as a successful accounting for the entropy of this black hole and how it engendered subsequent work that intended to strengthen the string theoretic analysis of black holes. Its relation to the formulation of the AdS/CFT conjecture will be briefly discussed, and the familiar reinterpretation of the entropy calculation in the context of the AdS/CFT correspondence is given. Finally, we discuss the heuristic role that Strominger and Vafa's microscopic account of black hole entropy played for the black hole information paradox. A companion paper analyses the ontology of the Strominger-Vafa black hole states, the question of emergence of the black hole from a collection of D-branes, and the role of the correspondence principle in the context of string theory black holes.</p></div>","PeriodicalId":54442,"journal":{"name":"Studies in History and Philosophy of Modern Physics","volume":"69 ","pages":"Pages 82-111"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.shpsb.2019.11.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85244048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}