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Francesco Vissani
Fri Sep 27 2024 12:00:00 (22 hours)
# 1.
arXiv:2409.17826v1 Announce Type: new Abstract: This short essay aims to offer a discursive presentation of three scientific articles by Ettore Majorana highlighting the fundamental importance of one of them – the last one – for the investigation of the intimate constitution of matter. The search for evidence to support Majorana’s thesis is the prime motivation of the conference “Multi-Aspect Young Oriented Advanced Neutrino Academy” at the G.P. Grimaldi Foundation in Modica, Sicily.
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Francesco Vissani
Fri Sep 27 2024 12:00:00 (22 hours)
# 2.
arXiv:2409.17824v1 Announce Type: new Abstract: The conceptual bases of Fermi’s $\beta$-ray theory (at its 90th anniversary) are examined, highlighting the innovative drive and inspirational role for the progress that followed just afterwards. Moreover, the three different ideas of the neutrino born from the proposals of Pauli 1930, again Fermi 1933 and Majorana 1937 papers are discussed, emphasising the interest of the latter for current expectations.
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Hai-Chau Nguyen
Fri Sep 27 2024 12:00:00 (22 hours)
# 3.
arXiv:2409.17574v1 Announce Type: new Abstract: Measurements remain as an interesting topic of research since the formulation of quantum theory. Attempts to model quantum measurements by unitary processes are prone to various foundational issues. Here, it is proposed that measurement devices can be modelled to have an open decoherence dynamics that is faster than any other relevant timescale, which is referred to as the ultradecoherence limit. In this limit, it is shown that the clicking rate of measurement devices can be derived from its underlying parameters, not only for the von Neumann ideal measurement devices but also for photon detectors in equal footing. This study offers a glimpse into the intriguing physics of measurement processes in quantum mechanics, with many aspects open for further investigation.
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A. Tononi, M. Lewenstein
Fri Sep 27 2024 12:00:00 (22 hours)
# 4.
arXiv:2409.17290v1 Announce Type: new Abstract: Proving the completeness of quantum mechanics has been a fundamental task since its foundation. After the formulation of the Bell inequalities, violated by quantum physics, it is nowadays believed that the theory is complete and non-local. While more general Bell-like inequalities, such as the one of Clauser and Horne, envisage a situation in which two parties choose at random two measurements to perform at causally-disconnected space-times, one could formulate temporal inequalities in which the two parties measure at different times. However, for causally-connected parties, these extensions are compatible with local hidden-variable theories, so that no quantum nature appears in such temporal correlations. Here we show that a temporal Clauser-Horne inequality for two spins is violated for nonzero time interval between the measurements if the two measured parties are connected by a spin chain. The chain constitutes a medium for the spreading of quantum information, which prevents the immediate signaling and thus the deterministic time evolution after the first measurement. Our result suggests that, as expected in a many-body setup, the Lieb-Robinson bound substitutes the speed of light as the fundamental limit for the spreading of information.
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Peyman Azodi, Benjamin Lienhard, Herschel A. Rabitz
Fri Sep 27 2024 12:00:00 (22 hours)
# 5.
arXiv:2409.17236v1 Announce Type: new Abstract: Despite significant progress in experimental quantum sciences, measuring entanglement entropy remains challenging. Through a geometric perspective, we reveal the intrinsic anti-symmetric nature of entanglement. We prove that most entanglement measures, such as von Neumann and Renyi entropies, can be expressed in terms of exterior products, which are fundamentally anti-symmetric. Leveraging this, we propose utilizing the anti-symmetric nature of fermions to measure entanglement entropy efficiently, offering a resource-efficient approach to probing bipartite entanglement.
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Fri Sep 27 2024 00:49:26 (1 day)
# 6.
Wolf, William J. and Read, James and Vigneron, Quentin (2023) The Non-Relativistic Geometric Trinity of Gravity. [Preprint]
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Wed Sep 25 2024 23:52:46 (2 days)
# 7.
Evans, Peter W. (2024) What is it like to be unitarily reversed? European Journal for Philosophy of Science. ISSN 1879-4912
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Wed Sep 25 2024 23:42:36 (2 days)
# 8.
Bonds, Liam and Burson, Brooke and Cicchella, Kade and Feintzeig, Benjamin H. and Lynnx, Lynnx and Yusaini, Alia (2024) Quantum Probability via the Method of Arbitrary Functions. [Preprint]
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Diederik Aerts, Jonito Aerts Argu\”elles, Lester Beltran. Massimiliano Sassoli de Bianchi, Sandro Sozzo
Wed Sep 25 2024 12:00:00 (2 days)
# 9.
arXiv:2409.15942v1 Announce Type: cross Abstract: Einstein’s article on the EPR paradox is the most cited of his works, but not many know that it was not fully representative of the way he thought about the incompleteness of the quantum formalism. Indeed, his main worry was not Heisenberg’s uncertainty principle, which he accepted, but the experimental non-separability of spatially separate systems. The same problem was also recognized, years later, by one of us, as part of an axiomatic analysis of the quantum formalism, which revealed an unexpected structural limitation of the quantum formalism in Hilbert space, preventing the description of separate systems. As we will explain, this limitation does not manifest at the level of the states, but of the projectors describing the properties, in the sense that there are not enough properties in the formalism to describe separate systems. The question remains whether separability is a possibility at the fundamental level and if a formalism should integrate it into its mathematical structure, as a possibility. To aid our intuition, we offer a reflection based on a powerful analogy between physical systems and human conceptual entities, as the question of separability also arises for the latter.
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Tue Sep 24 2024 23:45:59 (3 days)
# 10.
Azhar, Feraz and Linnemann, Niels (2024) Rethinking the Anthropic Principle. [Preprint]
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Tue Sep 24 2024 23:43:20 (3 days)
# 11.
Barrett, Thomas William and Manchak, JB (2024) Can We Recover Spacetime Structure from Privileged Coordinates? [Preprint]
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Donald Salisbury, Daniel Kennefick
Mon Sep 23 2024 12:00:00 (4 days)
# 12.
arXiv:1910.03753v2 Announce Type: replace Abstract: In a series of papers published in the course of his dissertation work in the mid 1950’s, Andrzej Trautman drew upon the slow motion approximation developed by his advisor Infeld, the general covariance based strong conservation laws enunciated by Bergmann and Goldberg, the Riemann tensor attributes explored by Goldberg and related geodesic deviation exploited by Pirani, the permissible metric discontinuities identified by Lichnerowicz, O’Brien and Synge, and finally Petrov’s classification of vacuum spacetimes. With several significant additions he produced a comprehensive overview of the state of research in equations of motion and gravitational waves that was presented in a widely cited series of lectures at King’s College, London, in 1958. Fundamental new contributions were the formulation of boundary conditions representing outgoing gravitational radiation the deduction of its Petrov type, a covariant expression for null wave fronts, and a derivation of the correct mass loss formula due to radiation emission. Ivor Robinson had already in 1956 developed a bi-vector based technique that had resulted in his rediscovery of exact plane gravitational wave solutions of Einstein’s equations. He was the first to characterize shear-free null geodesic congruences. He and Trautman met in London in 1958, and there resulted a long-term collaboration whose initial fruits were the Robinson-Trautman metric, examples of which were exact spherical gravitational waves.
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Dean Rickles
Mon Sep 23 2024 12:00:00 (4 days)
# 13.
arXiv:2409.13297v1 Announce Type: new Abstract: Music has been called the temporal art par excellence. Yet, as this paper explains, it is also the atemporal art par excellence. The contradiction is, however, only apparent, and a result of viewing music from two possible perspectives. That it has these two perspectives is the focus of this paper. In particular, the way in which these two aspects of music allow it to function as a kind of conduit between transcendent and immanent; immaterial and material. This can help explain the power of music to touch places deep in the soul (the part of us that transcends matter and time), that other forms of art struggle to reach. A somewhat similar debate occurs in looking at mathematics from an ontological point of view. In particular the treatment of the real numbers. There are curious properties of real numbers that seem to put them, like music, in the realm of the transcendent: in terms of the amount of information to specify them, one requires infinite computer time since there is no repeating pattern to their decimal expansions. One must simply evolve the sequence, working through it, despite the fact that it might have a perfectly situated home in Platonia. In other words, bringing them into this world demands a temporal element. We explore these and other links to a variety of issues in physics, ultimately arguing for dual-aspect monism.
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