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A Proposal for a Metaphysics of Self-Subsisting Structures. II. Quantum Physics 关于自存结构形而上学的建议》。二、量子物理学量子物理学
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-09-21 DOI: 10.1007/s10701-024-00800-7
Antonio Vassallo, Pedro Naranjo, Tim Koslowski
{"title":"A Proposal for a Metaphysics of Self-Subsisting Structures. II. Quantum Physics","authors":"Antonio Vassallo,&nbsp;Pedro Naranjo,&nbsp;Tim Koslowski","doi":"10.1007/s10701-024-00800-7","DOIUrl":"10.1007/s10701-024-00800-7","url":null,"abstract":"<div><p>The paper presents an extension of the metaphysics of self-subsisting structures set out in a companion paper to the realm of non-relativistic quantum physics. The discussion is centered around a Pure Shape Dynamics model representing a relational implementation of a de Broglie-Bohm <i>N</i>-body system. An interpretation of this model in terms of self-subsisting structures is proposed and assessed against the background of the debate on the metaphysics of quantum physics, with a particular emphasis on the nature of the wave function. The analysis shows that elaborating an appropriate Leibnizian/Machian metaphysics of the quantum world requires a substantial revision of the notion of world-building relation.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10701-024-00800-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Evolutionary Versus the All-at-Once Picture of Spacetime 时空的进化论与全时论
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-09-18 DOI: 10.1007/s10701-024-00799-x
M. Ebrahim Maghsoudi, Seyed Ali Taheri Khorramabadi
{"title":"The Evolutionary Versus the All-at-Once Picture of Spacetime","authors":"M. Ebrahim Maghsoudi,&nbsp;Seyed Ali Taheri Khorramabadi","doi":"10.1007/s10701-024-00799-x","DOIUrl":"10.1007/s10701-024-00799-x","url":null,"abstract":"<div><p>There are two metaphysical pictures of spacetime: The evolutionary picture and the all-at-once picture. According to the evolutionary picture, spacetime is nothing but the evolution of space over time. In contrast, the all-at-once picture considers spacetime as ‘a global, four-dimensional boundary value problem’ that can be solved only in an all-at-once manner, i.e. as a whole which is fundamentally four-dimensional and non-decomposable into spatial and temporal parts. The two most-known formulations of general theory of relativity, i.e. the Hamiltonian (or the canonical) and the Lagrangian (or the standard) formulations, enjoy the evolutionary and all-at-once pictures of spacetime respectively. Here, we have argued that (1) the all-at-once picture is more aligned with the philosophy of relativity theory, i.e. uniting space and time into spacetime, (2) the evolutionary picture is not as general as the all-at-once, since only in special cases, such as globally hyperbolic spacetimes, is it possible to deal with spacetime as the evolution of a spatial slice over time, and (3) the all-at-once picture paves the way to better understanding <i>four-dimensional</i> physical entities, like event horizons, which cannot be explained within an evolutionary picture without raising a paradox. Therefore, the evolutionary picture is neither the <i>fundamentally-true</i> nor the <i>naturally-chosen</i> picture of spacetime. Rather, we choose the evolutionary picture for practical and computational reasons. While the all-at-once picture seems a more appropriate description of the quantum and cosmological reality, the evolutionary picture can be applied occasionally and locally, or quasi-locally, and is not the proper metaphysical picture of spacetime at the fundamental level of reality.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bayes Keeps Boltzmann Brains at Bay 贝叶斯让波尔兹曼大脑保持清醒
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-09-14 DOI: 10.1007/s10701-024-00791-5
Don N. Page
{"title":"Bayes Keeps Boltzmann Brains at Bay","authors":"Don N. Page","doi":"10.1007/s10701-024-00791-5","DOIUrl":"10.1007/s10701-024-00791-5","url":null,"abstract":"<div><p>Sean Carroll has recently argued that theories predicting that observations are dominated by Boltzmann Brains should be rejected because they are cognitively unstable: “they cannot simultaneously be true and justifiably believed.” While such Boltzmann Brain theories are indeed cognitively unstable, one does not need to appeal to this argumentation to reject them. Instead, they may be ruled out by conventional Bayesian reasoning, which is sufficient to keep Boltzmann Brains at bay.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Arrival Times Versus Detection Times 到达时间与检测时间
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-09-14 DOI: 10.1007/s10701-024-00798-y
Sheldon Goldstein, Roderich Tumulka, Nino Zanghì
{"title":"Arrival Times Versus Detection Times","authors":"Sheldon Goldstein,&nbsp;Roderich Tumulka,&nbsp;Nino Zanghì","doi":"10.1007/s10701-024-00798-y","DOIUrl":"10.1007/s10701-024-00798-y","url":null,"abstract":"<div><p>How to compute the probability distribution of a detection time, i.e., of the time which a detector registers as the arrival time of a quantum particle, is a long-debated problem. In this regard, Bohmian mechanics provides in a straightforward way the distribution of the time at which the particle actually does arrive at a given surface in 3-space in the absence of detectors. However, as we discuss here, since the presence of detectors can change the evolution of the wave function and thus the particle trajectories, it cannot be taken for granted that the arrival time of the Bohmian trajectories in the absence of detectors agrees with the one in the presence of detectors, and even less with the detection time. In particular, we explain why certain distributions that Das and Dürr (Sci. Rep. 9: 2242, 2019) presented as the distribution of the detection time in a case with spin, based on assuming that all three times mentioned coincide, are actually not what Bohmian mechanics predicts.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10701-024-00798-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Revisiting the Charged Harmonic Oscillator in a Uniform Electric Field 重新审视均匀电场中的带电谐振子
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-09-02 DOI: 10.1007/s10701-024-00796-0
K. Bakke
{"title":"Revisiting the Charged Harmonic Oscillator in a Uniform Electric Field","authors":"K. Bakke","doi":"10.1007/s10701-024-00796-0","DOIUrl":"10.1007/s10701-024-00796-0","url":null,"abstract":"<div><p>We discuss the two-dimensional harmonic oscillator in the presence of a uniform radial electric field around a cylindrical cavity. By including the Aharonov-Bohm flux and by assuming the existence and the absence of an infinity wall located at the radius of the cylindrical cavity, we show that bound states can be achieved around the cylindrical cavity in this two-dimensional charged harmonic oscillator in a uniform radial electric field.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-Normalizing Path Integrals 自归一化路径积分
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-08-30 DOI: 10.1007/s10701-024-00779-1
Ivan M. Burbano, Francisco Calderón
{"title":"Self-Normalizing Path Integrals","authors":"Ivan M. Burbano,&nbsp;Francisco Calderón","doi":"10.1007/s10701-024-00779-1","DOIUrl":"10.1007/s10701-024-00779-1","url":null,"abstract":"<div><p>The normalization in the path integral approach to quantum field theory, in contrast with statistical field theory, can contain physical information. The main claim of this paper is that the inner product on the space of field configurations, one of the fundamental pieces of data required to be added to quantize a classical field theory, determines the normalization of the path integral. In fact, dimensional analysis shows that the introduction of this structure necessarily introduces a scale that is left unfixed by the classical theory. We study the dependence of the theory on this scale. This allows us to explore mechanisms that can be used to fix the normalization based on cutting and gluing different integrals. “Self-normalizing” path integrals, those independent of the scale, play an important role in this process. Furthermore, we show that the scale dependence encodes other important physical data: we use it to give a conceptually clear derivation of the chiral anomaly. Several explicit examples, including the scalar and compact bosons in different geometries, supplement our discussion.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring the Interplay Between Wave Function Realism and Gauge Symmetry Interpretations in Quantum Mechanics 探索量子力学中波函数现实主义与量子对称解释之间的相互作用
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-08-24 DOI: 10.1007/s10701-024-00797-z
Marco Sanchioni
{"title":"Exploring the Interplay Between Wave Function Realism and Gauge Symmetry Interpretations in Quantum Mechanics","authors":"Marco Sanchioni","doi":"10.1007/s10701-024-00797-z","DOIUrl":"10.1007/s10701-024-00797-z","url":null,"abstract":"<div><p>This paper examines the tension between wave function realism and interpretations of gauge symmetries within quantum mechanics. We explore how traditional views of gauge symmetries as descriptive redundancies challenge the principles of wave function realism, which regards the wave function as a real entity. By noting that, through the case study of a quantum particle in an electromagnetic field, gauge transformations impact the wave function’s phase, we present a dilemma for wave function realism. We discuss potential resolutions, including redefining ontological commitments to accommodate gauge-invariance.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anti-foundationalist Coherentism as an Ontology for Relational Quantum Mechanics 作为关系量子力学本体论的反基础主义相干论
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-08-21 DOI: 10.1007/s10701-024-00794-2
Emma Jaura
{"title":"Anti-foundationalist Coherentism as an Ontology for Relational Quantum Mechanics","authors":"Emma Jaura","doi":"10.1007/s10701-024-00794-2","DOIUrl":"10.1007/s10701-024-00794-2","url":null,"abstract":"<div><p>There have been a number of recent attempts to identify the best metaphysical framework for capturing Rovelli’s Relational Quantum Mechanics (RQM). All such accounts commit to some form of fundamentalia, whether they be traditional objects, physical relations, events or ‘flashes’, or the cosmos as a fundamental whole. However, Rovelli’s own recommendation is that ‘a natural philosophical home for RQM is an anti-foundationalist perspective' (Rovelli in Philos Trans R Soc 376:10, 2018). This gives us some prima facie reason to explore options beyond these foundationalist frameworks, and take seriously a picture that lacks fundamentalia. I construct an argument from elimination in favour of an anti-foundationalist interpretation of RQM. The argument notes that <i>priority monism</i> and <i>priority pluralism</i> are exhaustive foundationalist options, and then shows that there are reasons to reject their union with RQM. I finish by recommending <i>metaphysical coherentism</i> as a promising anti-foundationalist alternative, which captures the key characteristics of RQM through accepting symmetrical dependence, whilst avoiding challenges by jettisoning any commitment to fundamental entities.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10701-024-00794-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
sQFT: An Autonomous Explanation of the Interactions of Quantum Particles sQFT：量子粒子相互作用的自主解释
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-08-18 DOI: 10.1007/s10701-024-00795-1
K.-H. Rehren, L. T. Cardoso, C. Gass, J. M. Gracia-Bondía, B. Schroer, J. C. Várilly
{"title":"sQFT: An Autonomous Explanation of the Interactions of Quantum Particles","authors":"K.-H. Rehren,&nbsp;L. T. Cardoso,&nbsp;C. Gass,&nbsp;J. M. Gracia-Bondía,&nbsp;B. Schroer,&nbsp;J. C. Várilly","doi":"10.1007/s10701-024-00795-1","DOIUrl":"10.1007/s10701-024-00795-1","url":null,"abstract":"<div><p>Successful applications of a conceptually novel setup of Quantum Field Theory, that accounts for all subtheories of the Standard Model (QED, Electroweak Interaction and Higgs, Yang–Mills and QCD) and beyond (Helicity 2), call for a perspective view in a broader conceptual context. The setting is “autonomous” in the sense of being intrinsically quantum. Its principles are: Hilbert space, Poincaré symmetry and causality. Its free quantum fields are obtained from Wigner’s unitary representations of the Poincaré group, with only physical and observable degrees of freedom. A “quantization” of an “underlying” classical theory is not needed. It allows renormalizable perturbation theory with interactions whose detailed structure, and in some cases even the particle content, is predicted by internal consistency. The results confirm and extend observable predictions for the interactions of the Standard Model without assuming a “principle” of gauge invariance.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10701-024-00795-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum Physics, Digital Computers, and Life from a Holistic Perspective 量子物理学、数字计算机和整体视角下的生活
IF 1.2 3区 物理与天体物理
Foundations of Physics Pub Date : 2024-08-14 DOI: 10.1007/s10701-024-00792-4
George F. R. Ellis
{"title":"Quantum Physics, Digital Computers, and Life from a Holistic Perspective","authors":"George F. R. Ellis","doi":"10.1007/s10701-024-00792-4","DOIUrl":"10.1007/s10701-024-00792-4","url":null,"abstract":"<div><p>Quantum physics is a linear theory, so it is somewhat puzzling that it can underlie very complex systems such as digital computers and life. This paper investigates how this is possible. Physically, such complex systems are necessarily modular hierarchical structures, with a number of key features. Firstly, they cannot be described by a single wave function: only local wave functions can exist, rather than a single wave function for a living cell, a cat, or a brain. Secondly, the quantum to classical transition is characterised by contextual wave-function collapse shaped by macroscopic elements that can be described classically. Thirdly, downward causation occurs in the physical hierarchy in two key ways: by the downward influence of time dependent constraints, and by creation, modification, or deletion of lower level elements. Fourthly, there are also logical modular hierarchical structures supported by the physical ones, such as algorithms and computer programs, They are able to support arbitrary logical operations, which can influence physical outcomes as in computer aided design and 3-d printing. Finally, complex systems are necessarily open systems, with heat baths playing a key role in their dynamics and providing local arrows of time that agree with the cosmological direction of time that is established by the evolution of the universe.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"54 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10701-024-00792-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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