Falsification of General Relativity a New Theory of Gravity Without a Spacetime Continuum
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Einstein's Simple Mathematical Trick –And the Illusion of a Constant
Applied Physics Research; Vol. 5, No. 4; 2013 ISSN 1916-9639 E-ISSN 1916-9647 Published by Canadian Center of Science and Education Einstein’s Simple Mathematical Trick –and the Illusion of a Constant Speed of Light Conrad Ranzan1 1 DSSU Research, Niagara Falls, Canada Correspondence: Conrad Ranzan, Director, DSSU Research, 5145 Second Avenue, Niagara Falls, ON. L2E 4J8, Canada. Tel: 1-905-357-0788. E-mail: [email protected], [email protected] Received: May 24, 2013 Accepted: June 25, 2013 Online Published: July 15, 2013 doi:10.5539/apr.v5n4p85 URL: http://dx.doi.org/10.5539/apr.v5n4p85 Abstract It is shown how Einstein achieves the illusion of lightspeed invariance by employing a simple mathematical trick—and magically abolishing the aether. As if part of a "conspiracy" against man's efforts to obtain knowledge of the physical world, Nature has a “trick” of its own in providing the illusion of lightspeed invariance. The illusion works remarkably well, thanks to length contraction and clock slowing both of which are induced by absolute motion with respect to aether. Einstein’s illusion and Nature’s illusion, however, conceal the physical reality that the one-way speed of light, contrary to a strict interpretation of Einstein’s 2nd postulate, is NOT constant. Keywords: Albert Einstein, DSSU aether theory, special relativity, speed of light, 2nd postulate, absolute motion, absolute space, aether, length contraction, clock retardation As Einstein regarded the situation, the [aether] experiments, seemed to indicate a "conspiracy" on the part of nature against man's efforts to obtain knowledge of the physical world. -
Relativity and Fundamental Physics
Relativity and Fundamental Physics Sergei Kopeikin (1,2,*) 1) Dept. of Physics and Astronomy, University of Missouri, 322 Physics Building., Columbia, MO 65211, USA 2) Siberian State University of Geosystems and Technology, Plakhotny Street 10, Novosibirsk 630108, Russia Abstract Laser ranging has had a long and significant role in testing general relativity and it continues to make advance in this field. It is important to understand the relation of the laser ranging to other branches of fundamental gravitational physics and their mutual interaction. The talk overviews the basic theoretical principles underlying experimental tests of general relativity and the recent major achievements in this field. Introduction Modern theory of fundamental interactions relies heavily upon two strong pillars both created by Albert Einstein – special and general theory of relativity. Special relativity is a cornerstone of elementary particle physics and the quantum field theory while general relativity is a metric- based theory of gravitational field. Understanding the nature of the fundamental physical interactions and their hierarchic structure is the ultimate goal of theoretical and experimental physics. Among the four known fundamental interactions the most important but least understood is the gravitational interaction due to its weakness in the solar system – a primary experimental laboratory of gravitational physicists for several hundred years. Nowadays, general relativity is a canonical theory of gravity used by astrophysicists to study the black holes and astrophysical phenomena in the early universe. General relativity is a beautiful theoretical achievement but it is only a classic approximation to deeper fundamental nature of gravity. Any possible deviation from general relativity can be a clue to new physics (Turyshev, 2015). -
Ponderable Aethers, Which Arise in fixed Clock Theories
Prepared for submission to JCAP Ponderable aether Antony J. Speranzaa,b aMaryland Center for Fundamental Physics, University of Maryland, College Park, Maryland 20742 bPerimeter Institute for Theoretical Physics, 31 Caroline Street North, ON N2L 2Y5, Canada E-mail: [email protected] Abstract. We consider a Lorentz-violating theory of gravity where the aether vector is taken to be nondynamical. This “ponderable aether theory” is almost the same as Einstein- aether theory (where the aether vector is dynamical), but involves additional integration constants arising due to the loss of initial value constraints. One of these produces an effective energy density for the aether fluid, similar to the appearance of dark matter in projectable Hoˇrava gravity and the mimetic dark matter theory. Here we investigate the extent to which this energy density can reproduce the phenomenology of dark matter. Although it is indistinguishable from cold dark matter in homogeneous, isotropic cosmology, it encounters phenomenological problems in both spherically symmetric configurations and cosmological perturbations. Furthermore, inflationary considerations lead us to expect a tiny value for the ponderable aether energy density today unless a sourcing effect is added to the theory. The theory then effectively reduces to dynamical Einstein-aether theory, rendering moot the question of whether an aether must be dynamical in order to be consistent. arXiv:1504.03305v1 [gr-qc] 13 Apr 2015 Contents 1 Introduction 1 2 Lorentz-violating structures 3 2.1 Dynamics for Lorentz-violation -
New Experiments in Gravitational Physics
St. John Fisher College Fisher Digital Publications Physics Faculty/Staff Publications Physics 2014 New Experiments in Gravitational Physics Munawar Karim St. John Fisher College, [email protected] Ashfaque H. Bokhari King Fahd University of Petroleum and Minerals Follow this and additional works at: https://fisherpub.sjfc.edu/physics_facpub Part of the Physics Commons How has open access to Fisher Digital Publications benefited ou?y Publication Information Karim, Munawar and Bokhari, Ashfaque H. (2014). "New Experiments in Gravitational Physics." EPJ Web of Conferences 75, 05001-05001-p.10. Please note that the Publication Information provides general citation information and may not be appropriate for your discipline. To receive help in creating a citation based on your discipline, please visit http://libguides.sjfc.edu/citations. This document is posted at https://fisherpub.sjfc.edu/physics_facpub/29 and is brought to you for free and open access by Fisher Digital Publications at St. John Fisher College. For more information, please contact [email protected]. New Experiments in Gravitational Physics Abstract We propose experiments to examine and extend interpretations of the Einstein field equations. Experiments encompass the fields of astrophysics, quantum properties of the gravity field, gravitational effects on quantum electrodynamic phenomena and coupling of spinors to gravity. As an outcome of this work we were able to derive the temperature of the solar corona. Disciplines Physics Comments Proceedings from the Fifth International Symposium on Experimental Gravitation in Nanchang, China, July 8-13, 2013. Copyright is owned by the authors, published by EDP Sciences in EPJ Web of Conferences in 2014. Article is available at: http://dx.doi.org/10.1051/epjconf/20147405001. -
Basic Concepts for a Fundamental Aether Theory1
BASIC CONCEPTS FOR A FUNDAMENTAL AETHER THEORY1 Joseph Levy 4 square Anatole France, 91250 St Germain-lès-Corbeil, France E-mail: [email protected] 55 Pages, 8 figures, Subj-Class General physics ABSTRACT In the light of recent experimental and theoretical data, we go back to the studies tackled in previous publications [1] and develop some of their consequences. Some of their main aspects will be studied in further detail. Yet this text remains self- sufficient. The questions asked following these studies will be answered. The consistency of these developments in addition to the experimental results, enable to strongly support the existence of a preferred aether frame and of the anisotropy of the one-way speed of light in the Earth frame. The theory demonstrates that the apparent invariance of the speed of light results from the systematic measurement distortions entailed by length contraction, clock retardation and the synchronization procedures with light signals or by slow clock transport. Contrary to what is often believed, these two methods have been demonstrated to be equivalent by several authors [1]. The compatibility of the relativity principle with the existence of a preferred aether frame and with mass-energy conservation is discussed and the relation existing between the aether and inertial mass is investigated. The experimental space-time transformations connect co-ordinates altered by the systematic measurement distortions. Once these distortions are corrected, the hidden variables they conceal are disclosed. The theory sheds light on several points of physics which had not found a satisfactory explanation before. (Further important comments will be made in ref [1d]). -
Static Spherically Symmetric Black Holes in Weak F(T)-Gravity
universe Article Static Spherically Symmetric Black Holes in Weak f (T)-Gravity Christian Pfeifer 1,*,† and Sebastian Schuster 2,† 1 Center of Applied Space Technology and Microgravity—ZARM, University of Bremen, Am Fallturm 2, 28359 Bremen, Germany 2 Ústav Teoretické Fyziky, Matematicko-Fyzikální Fakulta, Univerzita Karlova, V Holešoviˇckách2, 180 00 Praha 8, Czech Republic; [email protected] * Correspondence: [email protected] † These authors contributed equally to this work. Abstract: With the advent of gravitational wave astronomy and first pictures of the “shadow” of the central black hole of our milky way, theoretical analyses of black holes (and compact objects mimicking them sufficiently closely) have become more important than ever. The near future promises more and more detailed information about the observable black holes and black hole candidates. This information could lead to important advances on constraints on or evidence for modifications of general relativity. More precisely, we are studying the influence of weak teleparallel perturbations on general relativistic vacuum spacetime geometries in spherical symmetry. We find the most general family of spherically symmetric, static vacuum solutions of the theory, which are candidates for describing teleparallel black holes which emerge as perturbations to the Schwarzschild black hole. We compare our findings to results on black hole or static, spherically symmetric solutions in teleparallel gravity discussed in the literature, by comparing the predictions for classical observables such as the photon sphere, the perihelion shift, the light deflection, and the Shapiro delay. On the basis of these observables, we demonstrate that among the solutions we found, there exist spacetime geometries that lead to much weaker bounds on teleparallel gravity than those found earlier. -
Radio and High-Energy Emission of Pulsars Revealed by General Relativity Q
A&A 639, A75 (2020) Astronomy https://doi.org/10.1051/0004-6361/202037979 & c Q. Giraud and J. Pétri 2020 Astrophysics Radio and high-energy emission of pulsars revealed by general relativity Q. Giraud and J. Pétri Université de Strasbourg, CNRS, Observatoire Astronomique de Strasbourg, UMR 7550, 67000 Strasbourg, France e-mail: [email protected] Received 18 March 2020 / Accepted 14 May 2020 ABSTRACT Context. According to current pulsar emission models, photons are produced within their magnetosphere and current sheet, along their separatrix, which is located inside and outside the light cylinder. Radio emission is favoured in the vicinity of the polar caps, whereas the high-energy counterpart is presumably enhanced in regions around the light cylinder, whether this is the magnetosphere and/or the wind. However, the gravitational effect on their light curves and spectral properties has only been sparsely researched. Aims. We present a method for simulating the influence that the gravitational field of the neutron star has on its emission properties according to the solution of a rotating dipole evolving in a slowly rotating neutron star metric described by general relativity. Methods. We numerically computed photon trajectories assuming a background Schwarzschild metric, applying our method to neu- tron star radiation mechanisms such as thermal emission from hot spots and non-thermal magnetospheric emission by curvature radiation. We detail the general-relativistic effects onto observations made by a distant observer. Results. Sky maps are computed using the vacuum electromagnetic field of a general-relativistic rotating dipole, extending previous works obtained for the Deutsch solution. We compare Newtonian results to their general-relativistic counterpart. -
The Confrontation Between General Relativity and Experiment
The Confrontation between General Relativity and Experiment Clifford M. Will Department of Physics University of Florida Gainesville FL 32611, U.S.A. email: [email protected]fl.edu http://www.phys.ufl.edu/~cmw/ Abstract The status of experimental tests of general relativity and of theoretical frameworks for analyzing them are reviewed and updated. Einstein’s equivalence principle (EEP) is well supported by experiments such as the E¨otv¨os experiment, tests of local Lorentz invariance and clock experiments. Ongoing tests of EEP and of the inverse square law are searching for new interactions arising from unification or quantum gravity. Tests of general relativity at the post-Newtonian level have reached high precision, including the light deflection, the Shapiro time delay, the perihelion advance of Mercury, the Nordtvedt effect in lunar motion, and frame-dragging. Gravitational wave damping has been detected in an amount that agrees with general relativity to better than half a percent using the Hulse–Taylor binary pulsar, and a growing family of other binary pulsar systems is yielding new tests, especially of strong-field effects. Current and future tests of relativity will center on strong gravity and gravitational waves. arXiv:1403.7377v1 [gr-qc] 28 Mar 2014 1 Contents 1 Introduction 3 2 Tests of the Foundations of Gravitation Theory 6 2.1 The Einstein equivalence principle . .. 6 2.1.1 Tests of the weak equivalence principle . .. 7 2.1.2 Tests of local Lorentz invariance . .. 9 2.1.3 Tests of local position invariance . 12 2.2 TheoreticalframeworksforanalyzingEEP. ....... 16 2.2.1 Schiff’sconjecture ................................ 16 2.2.2 The THǫµ formalism ............................. -
1 Fresnel's (Dragging) Coefficient As a Challenge to 19Th Century Optics
1 Fresnel’s (Dragging) Coefficient as a Challenge to 19th Century Optics of Moving Bodies John Stachel Center for Einstein Studies, Boston University, Boston, MA 02215, U.S.A., [email protected] 1.1 Introduction It has been suggested that, during the latter half of the 19th century up to about 1890, the optics of moving bodies was considered to be a more-or-less unproblematic branch of physics. In view of the continuing success of Fresnel’s formula for the dragging coefficient (hereafter called Fresnel’s coefficient) in explaining all new experimental optical data to order v/c, “There were simply no major problems to solve here, or so it was generally thought” (Buchwald 1988, 57). These words are the summation of the following quotation: “In 1851 Armand Fizeau was able to measure the Fresnel “drag” coefficient, and in 1873 Wilhelm Velt- mann demonstrated that no optical experiment with a terrestrial source of light can, to first order, detect motion through the ether if the drag coefficient obtains. Conse- quently, to this degree of accuracy, Fresnel’s original theory which requires a very slight transport of the ether by transparent bodies was quite satisfactory (ibid.)” (Schaffner 1972) includes a similar comment: “...Fresnel was able to formulate a simple and elegant explanation of Arago’s results on the basis of the wave theory of light; an explanation which not only accounted for aberration effects then known but which was subsequently confirmed in a number of ways throughout the nineteenth century (ibid., 24).” As we shall see, both Buchwald and Schaffner conflate the continued empirical success of Fresnel’s formula with the ultimately unsuccessful attempts by Fresnel and others to find a satisfactory theoretical explanation of the formula. -
Special and General Relativity (PHZ 4601/5606 – Fall 2018) Prof. Bernd A. Berg Phones: 850-273-0001, 850-644-6246, E-Mail: Bberg at Fsu Dot Edu Office: 615 Keen
Special and General Relativity (PHZ 4601/5606 { Fall 2018) Prof. Bernd A. Berg Phones: 850-273-0001, 850-644-6246, e-mail: bberg at fsu dot edu Office: 615 Keen • Class: MWF 9:05{9:55 am at HCB 0209. First Class August 27. • Office hours: Wednesdays 10:30-11:45 am and Thursdays 1:45-3:15 pm, and by ap- pointment (send e-mail). • Grader: Juan Mejia Marin, e-mail jjm17c at my dot fsu dot edu, Office hours Thursdays 5:15{7 pm at 614 Keen, and by appointment (send e-mail). • Midterm: Wednesday, October 17, 2018. • Test on Homework (tentative): Friday November 30. • Final: Thursday, December 11, 10 am { 12 pm at HCB 0209. Required Text: Wolfgang Rindler, Relativity, Special, General and Cosmological, Second Edition, Oxford University Press, New York, 2006. Overview and Goal The course gives an introduction to the fundamentals of space, time and matter. As a systematic, mathematically rigorous treatment is beyond the scope of an undergraduate course, we intend in essence to learn by explaining (often omitting proofs) sections from the textbook by Rindler. Bring the book to the lectures! Under the title Essential Relativity the book started off as a one semester course for senior undergraduate students, but has since then been expanded to a two semester course. Therefore, we will have to omit about half of the material. For an overview see the tentative schedule at the end of this syllabus and compare it with the preface and the table of contents of the textbook. After this course students should be able to explain the fundamental ideas of Special Relativity (SR) and General Relativity (GR) and master to solve by themselves standard problems to which the methods apply. -
Pos(GMC8)062 ∗ [email protected] Speaker
Gravitational lensing along multiple light paths as a PoS(GMC8)062 probe of physics beyond Einstein gravity Hideki Asada∗ Faculty of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan E-mail: [email protected] The light propagation is reexamined, allowing for various models of modied gravity. We clarify the dependence of the time delay (and induced frequency shift) on modied gravity models and investigate how to distinguish those models, when light propagates in static spherically symmetric spacetimes parameterized to express modied gravity. Implications to gravitational lensing are mentioned. The Manchester Microlensing Conference: The 12th International Conference and ANGLES Microlensing Workshop January 21-25 2008 Manchester, UK ∗Speaker. c Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. http://pos.sissa.it/ Gravitational lensing by modied gravity Hideki Asada 1. Introduction A certain modication, in whatever form, in the standard cosmological model, is strongly suggested by recent observations such as the magnitude-redshift relation of type Ia supernovae (SNIa) and the cosmic microwave background (CMB) anisotropy by WMAP. We are forced to add a new component into the energy-momentum tensor in the Einstein equation or modify the theory of general relativity itself. Indeed, plenty of models have been proposed, such as scalar tensor theories, string theories, higher dimensional scenarios and quantum gravity. Therefore, it is of great importance to observationally test these models. PoS(GMC8)062 The theory of general relativity has passed classical tests, such as the deection of light, the perihelion shift of Mercury and the Shapiro time delay, and also a systematic test using the remarkable binary pulsar PSR 1913+16. -
Pulse Arrival-Times from Binary Pulsars with Rotating Black Hole Companions
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CERN Document Server Submitted Ap. J. Lett. Pulse Arrival-Times from Binary Pulsars with Rotating Black Hole Companions Pablo Laguna1 and Alex Wolszczan2 Department of Astronomy & Astrophysics and Center for Gravitational Physics & Geometry Penn State University, University Park, PA 16802 ABSTRACT We present a study of the gravitational time delay of arrival of signals from binary pulsar systems with rotating black hole companions. In particular, we investigate the strength of this effect (Shapiro delay) as a function of the inclination, eccentricity and period of the orbit, as well as the mass and angular momentum of the black hole. This study is based on direct numerical integration of null geodesics in a Kerr background geometry. We find that, for binaries with sufficiently high orbital inclinations (> 89o) and compact companion masses > 10M , the effect arising from the rotation of the black hole in the system amounts to a microsecond–level variation of the arrival times of the pulsar pulses. If measurable, this variation could provide a unique signature for the presence of a rotating black hole in a binary pulsar system. Subject headings: pulsars: binaries, relativity Binary pulsars are excellent laboratories for testing General Relativity (GR) and other theories of gravity. Long-term timing observations of relativistic binaries, such as PSR B1913+16 (Hulse & Taylor 1975), yield highly precise measurements of post-Keplerian orbital parameters of the pulsar. In particular, observations of the the orbital decay of PSR B1913+16 induced by gravitational radiative effects have verified the validity of GR to within 0.5% (Taylor & Weisberg 1989).