Variable Planck's Constant
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Arxiv:Hep-Ph/9912247V1 6 Dec 1999 MGNTV COSMOLOGY IMAGINATIVE Abstract
IMAGINATIVE COSMOLOGY ROBERT H. BRANDENBERGER Physics Department, Brown University Providence, RI, 02912, USA AND JOAO˜ MAGUEIJO Theoretical Physics, The Blackett Laboratory, Imperial College Prince Consort Road, London SW7 2BZ, UK Abstract. We review1 a few off-the-beaten-track ideas in cosmology. They solve a variety of fundamental problems; also they are fun. We start with a description of non-singular dilaton cosmology. In these scenarios gravity is modified so that the Universe does not have a singular birth. We then present a variety of ideas mixing string theory and cosmology. These solve the cosmological problems usually solved by inflation, and furthermore shed light upon the issue of the number of dimensions of our Universe. We finally review several aspects of the varying speed of light theory. We show how the horizon, flatness, and cosmological constant problems may be solved in this scenario. We finally present a possible experimental test for a realization of this theory: a test in which the Supernovae results are to be combined with recent evidence for redshift dependence in the fine structure constant. arXiv:hep-ph/9912247v1 6 Dec 1999 1. Introduction In spite of their unprecedented success at providing causal theories for the origin of structure, our current models of the very early Universe, in partic- ular models of inflation and cosmic defect theories, leave several important issues unresolved and face crucial problems (see [1] for a more detailed dis- cussion). The purpose of this chapter is to present some imaginative and 1Brown preprint BROWN-HET-1198, invited lectures at the International School on Cosmology, Kish Island, Iran, Jan. -
Tests of General Relativity - Wikipedia
12/2/2018 Tests of general relativity - Wikipedia Tests of general relativity T ests of general relativity serve to establish observational evidence for the theory of general relativity. The first three tests, proposed by Einstein in 1915, concerned the "anomalous" precession of the perihelion of Mercury, the bending of light in gravitational fields, and the gravitational redshift. The precession of Mercury was already known; experiments showing light bending in line with the predictions of general relativity was found in 1919, with increasing precision measurements done in subsequent tests, and astrophysical measurement of the gravitational redshift was claimed to be measured in 1925, although measurements sensitive enough to actually confirm the theory were not done until 1954. A program of more accurate tests starting in 1959 tested the various predictions of general relativity with a further degree of accuracy in the weak gravitational field limit, severely limiting possible deviations from the theory. In the 197 0s, additional tests began to be made, starting with Irwin Shapiro's measurement of the relativistic time delay in radar signal travel time near the sun. Beginning in 197 4, Hulse, Taylor and others have studied the behaviour of binary pulsars experiencing much stronger gravitational fields than those found in the Solar System. Both in the weak field limit (as in the Solar System) and with the stronger fields present in systems of binary pulsars the predictions of general relativity have been extremely well tested locally. In February 2016, the Advanced LIGO team announced that they had directly detected gravitational waves from a black hole merger.[1] This discovery, along with additional detections announced in June 2016 and June 2017 ,[2] tested general relativity in the very strong field limit, observing to date no deviations from theory. -
On the Linkage Between Planck's Quantum and Maxwell's Equations
The Finnish Society for Natural Philosophy 25 years, K.V. Laurikainen Honorary Symposium, Helsinki 11.-12.11.2013 On the Linkage between Planck's Quantum and Maxwell's Equations Tuomo Suntola Physics Foundations Society, www.physicsfoundations.org Abstract The concept of quantum is one of the key elements of the foundations in modern physics. The term quantum is primarily identified as a discrete amount of something. In the early 20th century, the concept of quantum was needed to explain Max Planck’s blackbody radiation law which suggested that the elec- tromagnetic radiation emitted by atomic oscillators at the surfaces of a blackbody cavity appears as dis- crete packets with the energy proportional to the frequency of the radiation in the packet. The derivation of Planck’s equation from Maxwell’s equations shows quantizing as a property of the emission/absorption process rather than an intrinsic property of radiation; the Planck constant becomes linked to primary electrical constants allowing a unified expression of the energies of mass objects and electromagnetic radiation thereby offering a novel insight into the wave nature of matter. From discrete atoms to a quantum of radiation Continuity or discontinuity of matter has been seen as a fundamental question since antiquity. Aristotle saw perfection in continuity and opposed Democritus’s ideas of indivisible atoms. First evidences of atoms and molecules were obtained in chemistry as multiple proportions of elements in chemical reac- tions by the end of the 18th and in the early 19th centuries. For physicist, the idea of atoms emerged for more than half a century later, most concretely in statistical thermodynamics and kinetic gas theory that converted the mole-based considerations of chemists into molecule-based considerations based on con- servation laws and probabilities. -
Package 'Constants'
Package ‘constants’ February 25, 2021 Type Package Title Reference on Constants, Units and Uncertainty Version 1.0.1 Description CODATA internationally recommended values of the fundamental physical constants, provided as symbols for direct use within the R language. Optionally, the values with uncertainties and/or units are also provided if the 'errors', 'units' and/or 'quantities' packages are installed. The Committee on Data for Science and Technology (CODATA) is an interdisciplinary committee of the International Council for Science which periodically provides the internationally accepted set of values of the fundamental physical constants. This package contains the ``2018 CODATA'' version, published on May 2019: Eite Tiesinga, Peter J. Mohr, David B. Newell, and Barry N. Taylor (2020) <https://physics.nist.gov/cuu/Constants/>. License MIT + file LICENSE Encoding UTF-8 LazyData true URL https://github.com/r-quantities/constants BugReports https://github.com/r-quantities/constants/issues Depends R (>= 3.5.0) Suggests errors (>= 0.3.6), units, quantities, testthat ByteCompile yes RoxygenNote 7.1.1 NeedsCompilation no Author Iñaki Ucar [aut, cph, cre] (<https://orcid.org/0000-0001-6403-5550>) Maintainer Iñaki Ucar <[email protected]> Repository CRAN Date/Publication 2021-02-25 13:20:05 UTC 1 2 codata R topics documented: constants-package . .2 codata . .2 lookup . .3 syms.............................................4 Index 6 constants-package constants: Reference on Constants, Units and Uncertainty Description This package provides the 2018 version of the CODATA internationally recommended values of the fundamental physical constants for their use within the R language. Author(s) Iñaki Ucar References Eite Tiesinga, Peter J. Mohr, David B. -
Improving the Accuracy of the Numerical Values of the Estimates Some Fundamental Physical Constants
Improving the accuracy of the numerical values of the estimates some fundamental physical constants. Valery Timkov, Serg Timkov, Vladimir Zhukov, Konstantin Afanasiev To cite this version: Valery Timkov, Serg Timkov, Vladimir Zhukov, Konstantin Afanasiev. Improving the accuracy of the numerical values of the estimates some fundamental physical constants.. Digital Technologies, Odessa National Academy of Telecommunications, 2019, 25, pp.23 - 39. hal-02117148 HAL Id: hal-02117148 https://hal.archives-ouvertes.fr/hal-02117148 Submitted on 2 May 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Improving the accuracy of the numerical values of the estimates some fundamental physical constants. Valery F. Timkov1*, Serg V. Timkov2, Vladimir A. Zhukov2, Konstantin E. Afanasiev2 1Institute of Telecommunications and Global Geoinformation Space of the National Academy of Sciences of Ukraine, Senior Researcher, Ukraine. 2Research and Production Enterprise «TZHK», Researcher, Ukraine. *Email: [email protected] The list of designations in the text: l -
Guide for the Use of the International System of Units (SI)
Guide for the Use of the International System of Units (SI) m kg s cd SI mol K A NIST Special Publication 811 2008 Edition Ambler Thompson and Barry N. Taylor NIST Special Publication 811 2008 Edition Guide for the Use of the International System of Units (SI) Ambler Thompson Technology Services and Barry N. Taylor Physics Laboratory National Institute of Standards and Technology Gaithersburg, MD 20899 (Supersedes NIST Special Publication 811, 1995 Edition, April 1995) March 2008 U.S. Department of Commerce Carlos M. Gutierrez, Secretary National Institute of Standards and Technology James M. Turner, Acting Director National Institute of Standards and Technology Special Publication 811, 2008 Edition (Supersedes NIST Special Publication 811, April 1995 Edition) Natl. Inst. Stand. Technol. Spec. Publ. 811, 2008 Ed., 85 pages (March 2008; 2nd printing November 2008) CODEN: NSPUE3 Note on 2nd printing: This 2nd printing dated November 2008 of NIST SP811 corrects a number of minor typographical errors present in the 1st printing dated March 2008. Guide for the Use of the International System of Units (SI) Preface The International System of Units, universally abbreviated SI (from the French Le Système International d’Unités), is the modern metric system of measurement. Long the dominant measurement system used in science, the SI is becoming the dominant measurement system used in international commerce. The Omnibus Trade and Competitiveness Act of August 1988 [Public Law (PL) 100-418] changed the name of the National Bureau of Standards (NBS) to the National Institute of Standards and Technology (NIST) and gave to NIST the added task of helping U.S. -
A Different Derivation of the Calogero Conjecture
1 A Different Derivation of the Calogero Conjecture Ioannis Iraklis Haranas Physics and Astronomy Department York University 314 A Petrie Science Building Toronto – Ontario CANADA E mail: [email protected] Abstract: In a study by F. Calogero [1] entitled “ Cosmic origin of quantization” an expression was derived for the variability of h with time, and its consequences if any, of such an idea in cosmology were examined. In this paper we will offer a different derivation of the Calogero conjecture based on a postulate concerning a variable speed of light, [2] in conjuction with Weinberg’s relationship for the mass of an elementary particle. Introduction: Recently, Calogero studied and reconsidered the “ universal background noise which according to Nelsons’s stohastic mechanics [3,4,5] is the basis for the quantum behaviour. The position that Calogero took was that there might be a physical origin for this noise. He immediately pointed his attention to the gravitational interactions with the distant masses in the universe. Therefore, he argued for the case that Planck’s constant can be given by the following expression: 1/ 2 h ≈α G1/ 2m3/ 2[]R(t) (1) where α is a numerical constant = 1, G is the Newtonian gravitational constant, m is the mass of the hydrogen atom which is considered as the basic mass unit in the universe, and finally R(t) represents the radius of the universe or alternatively: “part of the universe which is accessible to gravitational interactions at time t.” [6]. We can obtain a rough estimate of the value of h if we just take into account that R(t) is the radius of the -28 universe evaluated at the present time t0 ie. -
Table of Contents (Print)
PERIODICALS PHYSICAL REVIEW D Postmaster send address changes to: For editorial and subscription correspondence, American Institute of Physics please see inside front cover Suite 1NO1 „ISSN: 0556-2821… 2 Huntington Quadrangle Melville, NY 11747-4502 THIRD SERIES, VOLUME 66, NUMBER 4 CONTENTS 15 AUGUST 2002 RAPID COMMUNICATIONS Density of cold dark matter (5 pages) ................................................... 041301͑R͒ Alessandro Melchiorri and Joseph Silk Shape of a small universe: Signatures in the cosmic microwave background (4 pages) . 041302͑R͒ R. Bowen and P. G. Ferreira Nonlinear r-modes in neutron stars: Instability of an unstable mode (5 pages) . 041303͑R͒ Philip Gressman, Lap-Ming Lin, Wai-Mo Suen, N. Stergioulas, and John L. Friedman Convergence and stability in numerical relativity (4 pages) . 041501͑R͒ Gioel Calabrese, Jorge Pullin, Olivier Sarbach, and Manuel Tiglio Stabilizing textures with magnetic ®elds (5 pages) . 041701͑R͒ R. S. Ward Friction in in¯aton equations of motion (5 pages) . 041702͑R͒ Ian D. Lawrie Singularity threshold of the nonlinear sigma model using 3D adaptive mesh re®nement (5 pages) . 041703͑R͒ Steven L. Liebling ARTICLES Neutrino damping rate at ®nite temperature and density (11 pages) . 043001 Eduardo S. Tututi, Manuel Torres, and Juan Carlos D'Olivo Numerical and analytical predictions for the large-scale Sunyaev-Zel'dovich effect (13 pages) . 043002 Alexandre Refregier and Romain Teyssier In¯ation, cold dark matter, and the central density problem (12 pages) . 043003 Andrew R. Zentner and James S. Bullock Size of the smallest scales in cosmic string networks (4 pages) . 043501 Xavier Siemens, Ken D. Olum, and Alexander Vilenkin Semiclassical force for electroweak baryogenesis: Three-dimensional derivation (9 pages) . -
Turbulence Examined in the Frequency-Wavenumber Domain*
Turbulence examined in the frequency-wavenumber domain∗ Andrew J. Morten Department of Physics University of Michigan Supported by funding from: National Science Foundation and Office of Naval Research ∗ Arbic et al. JPO 2012; Arbic et al. in review; Morten et al. papers in preparation Andrew J. Morten LOM 2013, Ann Arbor, MI Collaborators • University of Michigan Brian Arbic, Charlie Doering • MIT Glenn Flierl • University of Brest, and The University of Texas at Austin Robert Scott Andrew J. Morten LOM 2013, Ann Arbor, MI Outline of talk Part I{Motivation (research led by Brian Arbic) • Frequency-wavenumber analysis: {Idealized Quasi-geostrophic (QG) turbulence model. {High-resolution ocean general circulation model (HYCOM)∗: {AVISO gridded satellite altimeter data. ∗We used NLOM in Arbic et al. (2012) Part II-Research led by Andrew Morten • Derivation and interpretation of spectral transfers used above. • Frequency-domain analysis in two-dimensional turbulence. • Theoretical prediction for frequency spectra and spectral transfers due to the effects of \sweeping." {moving beyond a zeroth order approximation. Andrew J. Morten LOM 2013, Ann Arbor, MI Motivation: Intrinsic oceanic variability • Interested in quantifying the contributions of intrinsic nonlinearities in oceanic dynamics to oceanic frequency spectra. • Penduff et al. 2011: Interannual SSH variance in ocean models with interannual atmospheric forcing is comparable to variance in high resolution (eddying) ocean models with no interannual atmospheric forcing. • Might this eddy-driven low-frequency variability be connected to the well-known inverse cascade to low wavenumbers (e.g. Fjortoft 1953)? • A separate motivation is simply that transfers in mixed ! − k space provide a useful diagnostic. Andrew J. -
Certain Investigations Regarding Variable Physical Constants
IJRRAS 6 (1) ● January 2011 www.arpapress.com/Volumes/Vol6Issue1/IJRRAS_6_1_03.pdf CERTAIN INVESTIGATIONS REGARDING VARIABLE PHYSICAL CONSTANTS 1 2 3 Amritbir Singh , R. K. Mishra & Sukhjit Singh 1 Department of Mathematics, BBSB Engineering College, Fatehgarh Sahib, Punjab, India 2 & 3 Department of Mathematics, SLIET Deemed University, Longowal, Sangrur, Punjab, India. ABSTRACT In this paper, we have investigated details regarding variable physical & cosmological constants mainly G, c, h, α, NA, e & Λ. It is easy to see that the constancy of G & c is consistent, provided that all actual variations from experiment to experiment, or method to method, are due to some truncation or inherent error. It has also been noticed that physical constants may fluctuate, within limits, around average values which themselves remain fairly constant. Several attempts have been made to look for changes in Plank‟s constant by studying the light from quasars and stars assumed to be very distant on the basis of the red shift in their spectra. Detail Comparison of concerned research done has been done in the present paper. Keywords: Fundamental physical constants, Cosmological constant. A.M.S. Subject Classification Number: 83F05 1. INTRODUCTION We all are very much familiar with the importance of the 'physical constants‟, now in these days they are being used in all the scientific calculations. As the name implies, the so-called physical constants are supposed to be changeless. It is assumed that these constants are reflecting an underlying constancy of nature. Recent observations suggest that these fundamental Physical Constants of nature may actually be varying. There is a debate among cosmologists & physicists, whether the observations are correct but, if confirmed, many of our ideas may have to be rethought. -
Variable Planck's Constant
Variable Planck’s Constant: Treated As A Dynamical Field And Path Integral Rand Dannenberg Ventura College, Physics and Astronomy Department, Ventura CA [email protected] [email protected] January 28, 2021 Abstract. The constant ħ is elevated to a dynamical field, coupling to other fields, and itself, through the Lagrangian density derivative terms. The spatial and temporal dependence of ħ falls directly out of the field equations themselves. Three solutions are found: a free field with a tadpole term; a standing-wave non-propagating mode; a non-oscillating non-propagating mode. The first two could be quantized. The third corresponds to a zero-momentum classical field that naturally decays spatially to a constant with no ad-hoc terms added to the Lagrangian. An attempt is made to calibrate the constants in the third solution based on experimental data. The three fields are referred to as actons. It is tentatively concluded that the acton origin coincides with a massive body, or point of infinite density, though is not mass dependent. An expression for the positional dependence of Planck’s constant is derived from a field theory in this work that matches in functional form that of one derived from considerations of Local Position Invariance violation in GR in another paper by this author. Astrophysical and Cosmological interpretations are provided. A derivation is shown for how the integrand in the path integral exponent becomes Lc/ħ(r), where Lc is the classical action. The path that makes stationary the integral in the exponent is termed the “dominant” path, and deviates from the classical path systematically due to the position dependence of ħ. -
The Experimental Verdict on Spacetime from Gravity Probe B
The Experimental Verdict on Spacetime from Gravity Probe B James Overduin Abstract Concepts of space and time have been closely connected with matter since the time of the ancient Greeks. The history of these ideas is briefly reviewed, focusing on the debate between “absolute” and “relational” views of space and time and their influence on Einstein’s theory of general relativity, as formulated in the language of four-dimensional spacetime by Minkowski in 1908. After a brief detour through Minkowski’s modern-day legacy in higher dimensions, an overview is given of the current experimental status of general relativity. Gravity Probe B is the first test of this theory to focus on spin, and the first to produce direct and unambiguous detections of the geodetic effect (warped spacetime tugs on a spin- ning gyroscope) and the frame-dragging effect (the spinning earth pulls spacetime around with it). These effects have important implications for astrophysics, cosmol- ogy and the origin of inertia. Philosophically, they might also be viewed as tests of the propositions that spacetime acts on matter (geodetic effect) and that matter acts back on spacetime (frame-dragging effect). 1 Space and Time Before Minkowski The Stoic philosopher Zeno of Elea, author of Zeno’s paradoxes (c. 490-430 BCE), is said to have held that space and time were unreal since they could neither act nor be acted upon by matter [1]. This is perhaps the earliest version of the relational view of space and time, a view whose philosophical fortunes have waxed and waned with the centuries, but which has exercised enormous influence on physics.