The Negative Energy Sea  from philsciSun Mar 17 2024 20:41:15 (5 days)# 12. Saunders, Simon (1991) The Negative Energy Sea. Philosophy of Vacuum. pp. 65-109. ISSN 9780198244493 Many worlds or one: reply to Steeger | |
from philsciSat Mar 23 2024 03:01:45 (7 hours)# 1.
March, Eleanor (2024) Many worlds or one: reply to Steeger. [Preprint]
from physics.hist-ph by Alessio Rocci, Thomas Van RietFri Mar 22 2024 11:49:22 (23 hours)# 2.
arXiv:2403.14008v1 Announce Type: new Abstract: This paper analyzes the effective field theory perspective on modern physics through the lens of the quantum theory of gravitational interaction. The historical part argues that the search for a theory of quantum gravity stimulated the change in outlook that characterizes the modern approach to the Standard Model of particle physics and General Relativity. We present some landmarks covering a long period, i.e., from the beginning of the 1930s until 1994, when, according to Steven Weinberg, the modern bottom-up approach to General Relativity began. Starting from the first attempt to apply the quantum field theory techniques to perturbatively quantize Einstein’s theory, we explore its developments and interaction with the top-down approach encoded by String Theory. In the last part of the paper, we focus on this last approach to describe the relationship between our modern understanding of String Theory and Effective Field Theory in today’s panorama. To this end, the non-historical part briefly explains the modern concepts of moduli stabilization and Swampland to understand another change in focus that explains the present framework where some string theorists move.
from gr-qc by Bikash R. Dinda, Narayan BanerjeeFri Mar 22 2024 11:49:07 (23 hours)# 3.
arXiv:2403.14223v1 Announce Type: cross Abstract: We study the evolution of the dark energy equation of the state parameter without tying ourselves to any specific cosmological model or parametrization except spatial homogeneity, isotropy, and flatness leading to a flat Friedmann-Lema\^itre-Robertson-Walker (FLRW) metric. Instead, we rely on actual observational data to guide our analysis. This is the first study in which we combine the cosmological background and the growth observations to reconstruct the equation of the state parameter of dark energy independent of the present values of the matter-energy density parameter and Hubble parameter. We use information about the Hubble parameter from cosmic chronometer data and the growth rate from observations related to growth rates. Our method involves a posterior approach of Gaussian process regression analysis to figure out the Hubble parameter and growth rate, plus their changes with redshift. The significant shift of paradigm in this study lies in the independence of the reconstruction of the dark energy equation of state from any prior knowledge of the present Hubble parameter and matter energy density parameter. We find a slight hint of dynamical behavior in dark energy. However, the evidence is not significant. We also find a leaning towards non-phantom behavior over phantom behavior. Intriguingly, we observe that the $\Lambda$CDM model nearly touches the lower boundary of the 1$\sigma$ confidence region for the reconstructed dark energy equation of state parameter in the redshift range $0.6 \lesssim z \lesssim 0.85$. However, it comfortably resides within the 1$\sigma$ confidence region in the redshift range under investigation, $0\leq z \leq 1.5$. Consequently, the non-parametric, model-independent reconstruction of dark energy provides no compelling evidence to deviate from the $\Lambda$CDM model when considering cosmic chronometer and growth rate observations.
from APS selected papers by Mark BuchananFri Mar 22 2024 06:00:00 (1 day)# 4.
Author(s): Mark Buchanan
A new gravimeter is compact and stable and can detect the daily solar and lunar gravitational oscillations that are responsible for the tides.
[Physics 17, 48] Published Fri Mar 22, 2024
from PRL by Anirban Das, Noah Kurinsky, and Rebecca K. LeaneFri Mar 22 2024 06:00:00 (1 day)# 5.
Author(s): Anirban Das, Noah Kurinsky, and Rebecca K. Leane
Sub-GeV dark matter particles can be probed via power measurements in quantum devices.
[Phys. Rev. Lett. 132, 121801] Published Fri Mar 22, 2024
from PRA – fundamentalconcepts by Tae-Hun Lee and Jarosław K. KorbiczFri Mar 22 2024 06:00:00 (1 day)# 6.
Author(s): Tae-Hun Lee and Jarosław K. Korbicz
We address the problem of the fundamental limitations of information extraction from the environment in open quantum systems. We derive a model-independent, hybrid quantum-classical solution of open dynamics in the recoilless limit, which includes environmental degrees of freedom. Specifying to the …
[Phys. Rev. A 109, 032221] Published Fri Mar 22, 2024
from physics.hist-ph by Peter WestThu Mar 21 2024 10:50:08 (2 days)# 7.
arXiv:2403.13453v1 Announce Type: new Abstract: I give an account of what it was like to be a PhD student of Abdus Salam and also to take part during the early stages of the development of supersymmetry.
from physics.hist-ph by Henrique GomesTue Mar 19 2024 10:12:44 (4 days)# 8.
arXiv:2403.10970v1 Announce Type: new Abstract: The hole argument of general relativity threatens a radical and pernicious form of indeterminism. One natural response to the argument is that points belonging to different but isometric models should always be identified, or ‘dragged-along’, by the diffeomorphism that relates them. In this paper, I first criticise this response and its construal of isometry: it stumbles on certain cases, like Noether’s second theorem. Then I go on to describe how the essential features of Einstein\rq{}s `point-coincidence’ response to the hole argument avoid the criticisms of the `drag-along response’ and are compatible with Noether’s second theorem.
from physics.hist-ph by Pascal Marquet, Max PlanckMon Mar 18 2024 09:44:45 (5 days)# 9.
arXiv:2403.09686v1 Announce Type: new Abstract: This is an English (annotated) translation of the Thesis report (in German) of Max Planck at the University of Munich (1879)
from physics.hist-ph by Pascal Marquet, Max PlanckMon Mar 18 2024 09:44:43 (5 days)# 10.
arXiv:2403.09688v1 Announce Type: new Abstract: This is an English (annotated) translation of the German paper by Max Planck (1887) about “The principle of the conservation of energy”
from physics.hist-ph by Pascal Marquet, Max PlanckMon Mar 18 2024 09:44:42 (5 days)# 11.
arXiv:2403.09689v1 Announce Type: new Abstract: This is an English (annotated) translation of the German paper by Max Planck (1943) about “The history of the discovery of the physical quantum of action”
