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Sat Feb 11 2023 03:57:06 (12 hours)
# 1.
Alemañ-Berenguer, Rafael-Andrés (2023) THE SPATIAL INFINITY OF THE UNIVERSE: THE NEGLECTED PROBLEM OF COSMOLOGY. [Preprint]
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D. G. Yakovlev, A. D. Kaminker (Ioffe Institute)
Fri Feb 10 2023 09:46:43 (1 day)
# 2.
E. B. Gliner started his scientific career in 1963 at the age of 40. In 1965, when the existence of the cosmological constant $\lambda$ seemed unnecessary to most cosmologists, he renewed interest in the problem by emphasizing a material interpretation of de Sitter space (i.e., the space curved in the presence of $\lambda$). According to that interpretation, the curvature is produced by a cosmological vacuum (now identified as dark energy of the universe). In 1970, Gliner proposed a description of exponential expansion (or contraction) of the universe at the early (or late) evolution stage dominated by cosmological vacuum. In 1975, Gliner (with I.G. Dyminikova) suggested a model of the early universe free of Big Bang singularity, and developed a scenario of nonsingular Friedmann cosmology. Many of these findings were used in the modern inflation scenarios of the universe, first proposed by A.A. Starobinsky (1979) and A. Guth (1981) and greatly multiplied later. However, these inflation scenarios differ from the scenario of Gliner and Dymnikova, and Gliner’s contribution to cosmology is nearly forgotten. The history and the essence of this contribution are outlined, as well the difference from the inflation theories.
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Pasquale Bosso, Luciano Petruzziello, Fabian Wagner
Fri Feb 10 2023 09:46:29 (1 day)
# 3.
The minimal-length paradigm, a possible implication of quantum gravity at low energies, is commonly understood as a phenomenological modification of Heisenberg’s uncertainty relation. We show that this modification is equivalent to a cut-off in the space conjugate to the position representation, i.e. the space of wave numbers, which does not necessarily correspond to momentum space. This result is generalized to several dimensions and noncommutative geometries once a suitable definition of the wave number is provided. Furthermore, we find a direct relation between the ensuing bound in wave-number space and the minimal-length scale. For scenarios in which the existence of the minimal length cannot be explicitly verified, the proposed framework can be used to clarify the situation. Indeed, applying it to common models, we find that one of them does, against all expectations, allow for arbitrary precision in position measurements. In closing, we comment on general implications of our findings for the field. In particular, we point out that the minimal length is purely kinematical such that, effectively, there is only one model of minimal-length quantum mechanics.
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Thu Feb 09 2023 12:26:18 (2 days)
# 4.
Guo, Bixin (2022) Can Humeans be Scientific Realist? [Preprint]
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Pietro Govoni; Andrea Massironi
Thu Feb 09 2023 08:00:00 (2 days)
# 5.
Nature Physics, Published online: 09 February 2023; doi:10.1038/s41567-022-01761-2
Ten years after the discovery of the Higgs boson, the ATLAS Collaboration probes its underlying mechanism, the electroweak symmetry breaking, by measuring the scattering of Z bosons, one of the mediators of the weak interactions.
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Thu Feb 09 2023 03:24:34 (2 days)
# 6.
Weinstein, Galina (2023) Weinstein on Berger and DiRuggiero, ‘Einstein: The Man and His Mind’. H-Sci-Med-Tech. pp. 1-5.
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Pasquale Tucci
Wed Feb 08 2023 10:34:03 (3 days)
# 7.
The folder containing the sheets of the Memoirs of Dilworth/Occhialini is kept in the Dilworth-Occhialini Archives at the BICF Library of the University of Milan. They cover the two English periods of Giuseppe Paolo Stanislao Occhialini (1907-1993): in Cambridge between 1931 and 1934 and in Bristol between 1945 and 1948. The Memoirs were written between an unspecified day in 1992 and April 16, 1993. They do not have the organic form of a historical reconstruction but are recollections and clarifications of Occhialini about some aspects of his activity, neglected by both historians and his colleagues, primarily Powell. Constance Dilworth (1924-2004) was the driving force. In Occhialini’s considerations, references to specific dates or documents are often missing. In my contribution, after briefly describing the contents of the Memoirs, I will focus my attention on Occhialini’s claim to have been instrumental in improving photographic plates provided by Ilford in the 1945, without Powell ever having acknowledged the importance of the suggestion. Keywords: History of cosmic rays, Occhialini, Dilworth, Blackett, Powell, Rutherford, Heisenberg, Rosbaud, Houtermans.
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Zhonghao Lu
Wed Feb 08 2023 10:34:02 (3 days)
# 8.
The deterministic nature of EQM seems to be inconsistent to the probability talk in EQM, and this is called the “incoherence problem”. I discuss solutions of pre-measurement uncertainty to this problem based on Lewis’s account of personal identity in my paper. I argue that, if there is only one 3-dimensional mental states which supervenes on one physical state before branching as the original Lewis’s account suggests, the solution cannot solve the incoherence problem. Consequently, if there are be more than one 3-dimensional qualitatively identical but numerically different mental states which supervene on one physical state, the objections to the solution can be settled, but it contradicts principles of physicalism.
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Pasquale Tucci
Tue Feb 07 2023 10:13:26 (4 days)
# 9.
In the 60s of the last century the few courses of History of physics in Physics degree were held by scholars who, apart from a few exceptions, did not have a specific research background in the field. Some activities, books, social movements in the civil society allowed in the 70’s the entry, among Physics courses, of teachings in History of physics held by scholars specifically trained for that job since their degree. A second change happened in the 90s when many difficulties forced physicists to allocate fewer and fewer resources to the History of their discipline. I’ll outline the features of the two periods and the efforts of Historians to find a proper space in Physics departments.
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Rohini M. Godbole, Urjit Yajnik
Tue Feb 07 2023 10:13:25 (4 days)
# 10.
This is a homage to the memory of Prof. Steven Weinberg who passed away on 23 July 2021.
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Emily Adlam
Tue Feb 07 2023 10:13:23 (4 days)
# 11.
Any successful interpretation of quantum mechanics must explain how our empirical evidence allows us to come to know about quantum mechanics. In this article, we argue that this vital criterion is not met by the class of ‘orthodox interpretations,’ which includes QBism, neo-Copenhagen interpretations, and some versions of relational quantum mechanics. We demonstrate that intersubjectivity fails in radical ways in these approaches, and we explain why intersubjectivity matters for empirical confirmation. We take a detailed look at the way in which belief-updating might work in the kind of universe postulated by an orthodox interpretation, and argue that observers in such a universe are unable to escape their own perspective in order to learn about the structure of the set of perspectives that is supposed to make up reality according to these interpretations. We also argue that in some versions of these interpretations it is not even possible to use one’s own relative frequencies for empirical confirmation. Ultimately we conclude that it cannot be rational to believe these sorts of interpretations unless they are supplemented with some observer-independent structure which underwrites intersubjective agreement in at least certain sorts of cases.
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Tue Feb 07 2023 05:45:59 (4 days)
# 12.
Ding, Chao and Liu, Chuang (2022) Kripke’s Gödel case: Descriptive ambiguity and its experimental interpretation. THEORIA. An International Journal for Theory, History and Foundations of Science, 37 (3). pp. 291-308. ISSN 2171-679X
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Tue Feb 07 2023 05:39:20 (4 days)
# 13.
Kleiner, Johannes and Stephan, Hartmann (2023) The Closure of the Physical, Consciousness and Scientific Practice. [Preprint]
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Mon Feb 06 2023 03:01:26 (5 days)
# 14.
Ketland, Jeffrey (2023) Length Abstraction in Euclidean Geometry. [Preprint]
