Foundations of Physics最新文献

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-03-18 DOI: 10.1007/s10701-025-00838-1

Richard Healey

{"title":"Perspectives in and on Quantum Theory","authors":"Richard Healey","doi":"10.1007/s10701-025-00838-1","DOIUrl":"10.1007/s10701-025-00838-1","url":null,"abstract":"<div><p>I take a pragmatist perspective on quantum theory. This is not a view of the world described by quantum theory. In this view quantum theory itself does not describe the physical world (nor our observations, experiences or opinions of it). Instead, the theory offers reliable advice—on when to expect an event of one kind or another, and on how strongly to expect each possible outcome of that event. The event’s actual outcome is a perspectival fact—a fact relative to a physical context of assessment. Measurement outcomes and quantum states are both perspectival. By noticing that each must be relativized to an appropriate physical context one can resolve the measurement problem and the problem of nonlocal action. But if the outcome of a quantum measurement is not an absolute fact, then why should the statistics of such outcomes give us any objective reason to accept quantum theory? One can describe extensions of the scenario of Wigner’s friend in which a statement expressing the outcome of a quantum measurement would be true relative to one such context but not relative to another. However, physical conditions in our world prevent us from realizing such scenarios. Since the outcome of every actual quantum measurement is certified at what is essentially a single context of assessment, the outcome relative to that context is an objective fact in the only sense that matters for science. We should accept quantum theory because the statistics these outcomes display are just those it leads us to expect.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"55 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638377","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

Emergence-Free Duality: Phonons and Vibrating Atoms in Crystalline Solids

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-03-17 DOI: 10.1007/s10701-025-00834-5

Sebastian Fortin, Matías Pasqualini

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Comment on a No-Go Theorem for (psi )-Ontic Models

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-03-14 DOI: 10.1007/s10701-025-00836-3

Laurens Walleghem, Shashaank Khanna, Rutvij Bhavsar

引用次数: 0

A proof that no-signalling implies microcausality in quantum field theory

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-03-13 DOI: 10.1007/s10701-025-00832-7

Antoine Soulas

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Relativistic Corrections to the Quantization of a Classical Spinning Particle with Constant Electric and Magnetic Fields

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-03-12 DOI: 10.1007/s10701-025-00833-6

John French

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The Extended Wigner’s Friend, Many-and Single-Worlds and Reasoning from Observation

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-03-07 DOI: 10.1007/s10701-025-00831-8

Andrew Steane

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Phenomenology of Holography via Quantum Coherence on Causal Horizons

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-03-05 DOI: 10.1007/s10701-025-00827-4

Ohkyung Kwon

{"title":"Phenomenology of Holography via Quantum Coherence on Causal Horizons","authors":"Ohkyung Kwon","doi":"10.1007/s10701-025-00827-4","DOIUrl":"10.1007/s10701-025-00827-4","url":null,"abstract":"<div><p>There is much recent development towards interferometric measurements of holographic quantum uncertainties in an emergent background space-time. Despite increasing promise for the target detection regime of Planckian strain power spectral density, the foundational insights of the motivating theories have not been connected to a phenomenological model of observables measured in a realistic experiment. This work proposes a candidate model, based on the central hypothesis that all horizons are universal boundaries of coherent quantum information — where the decoherence of space-time happens for the observer. The prediction is inspired by ’t Hooft’s algebra for black hole information that gives coherent states on horizons, whose spatial correlations were shown by Verlinde and Zurek to also appear on holographic fluctuations of causal boundaries in flat space-time (conformal Killing horizons). Time-domain correlations are projected from Planckian jitters whose coherence scales match causal diamonds, motivated by Banks’ framework for the emergence of space-time and locality. The universality of this coherence on causal horizons compels a multimodal research program probing concordant signatures: An analysis of cosmological data to probe primordial correlations, motivated by Hogan’s interpretation of well-known CMB anomalies as coherent fluctuations on the inflationary horizon, and upcoming 3D interferometers to probe causal diamonds in flat space-time. Candidate interferometer geometries are presented, with a modeled frequency spectrum for each design.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"55 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554090","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}

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Review of Accelerating Expansion: Philosophy and Physics with a Positive Cosmological Constant, by Gordon Belot

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-02-18 DOI: 10.1007/s10701-025-00822-9

Franciszek Cudek, James Read

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Does Quantum Information Require Additional Structure? 量子信息需要额外的结构吗？

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-02-16 DOI: 10.1007/s10701-025-00828-3

Ryszard Horodecki

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Unitary Time Evolution in Quantum Mechanics is a Stronger Physical Postulate than Linear Time Evolution

IF 1.2 3区物理与天体物理

Foundations of Physics Pub Date : 2025-02-11 DOI: 10.1007/s10701-024-00818-x

Edward Parker

{"title":"Unitary Time Evolution in Quantum Mechanics is a Stronger Physical Postulate than Linear Time Evolution","authors":"Edward Parker","doi":"10.1007/s10701-024-00818-x","DOIUrl":"10.1007/s10701-024-00818-x","url":null,"abstract":"<div><p>Discussions of quantum mechanics often loosely claim that time evolution logically must be unitary, in order for the probabilistic interpretation of the amplitudes of the state vector to make sense at all times. We discuss from first principles whether this claim is true: if we assume only that the time-evolution operator is <i>linear</i>, then does the stronger requirement that it be <i>unitary</i> follow from the other axioms of quantum mechanics? The answer is subtle. We discuss two mathematically distinct but physically equivalent formulations of the axioms of quantum mechanics, and consider generalizing each to postulate only that time evolution is linear. Within one formulation, the unitarity of time evolution follows logically from the other axioms – but within the other formulation, it does not. Allowing the time-evolution operator to be (a priori) arbitrarily linear does not change the physical observables in one formulation of quantum mechanics, but changes the other formulation to a <i>distinct</i> (internally consistent) physical theory that allows new phenomenology like (e.g.) faster-than-light communication. Therefore, the unitarity of time evolution is arguably better thought of as a logically independent and experimentally falsifiable axiom of quantum mechanics, not as a tautological consequence of the other axioms.</p></div>","PeriodicalId":569,"journal":{"name":"Foundations of Physics","volume":"55 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10701-024-00818-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388716","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}

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