Thoroughly Testing Einstein's Special Relativity
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Foundations of Interstellar Studies NY Issue
Journal of the British Interplanetary Society VOLUME 71 NO.8 AUGUST 2018 Foundations of Interstellar Studies NY Issue FIRST STOP ON THE INTERSTELLAR JOURNEY The Solar Gravity Lens Focus Louis Friedman & Slava G. Turyshev EXPERIMENTAL SIMULATION OF DUST IMPACTS at Starflight Velocities Andrew J. Higgins PLASMA DYNAMICS in Firefly's Z-pinch Fusion Engine Robert M. Freeland II GRAM-SCALE NANO-SPACECRAFT Entry into Star Systems Albert Allen Jackson IV THE INTERSTELLAR FUSION FUEL RESOURCE BASE of our Solar System Robert G. Kennedy TESTS OF FUNDAMENTAL PHYSICS in Interstellar Flight Roman Ya. Kezerashvili www.bis-space.com ISSN 0007-084X PUBLICATION DATE: 4 JANUARY 2019 Submitting papers International Advisory Board to JBIS JBIS welcomes the submission of technical Rachel Armstrong, Newcastle University, UK papers for publication dealing with technical Peter Bainum, Howard University, USA reviews, research, technology and engineering in astronautics and related fields. Stephen Baxter, Science & Science Fiction Writer, UK James Benford, Microwave Sciences, California, USA Text should be: James Biggs, The University of Strathclyde, UK ■ As concise as the content allows – typically 5,000 to 6,000 words. Shorter papers (Technical Notes) Anu Bowman, Foundation for Enterprise Development, California, USA will also be considered; longer papers will only Gerald Cleaver, Baylor University, USA be considered in exceptional circumstances – for Charles Cockell, University of Edinburgh, UK example, in the case of a major subject review. Ian A. Crawford, Birkbeck College London, UK ■ Source references should be inserted in the text in square brackets – [1] – and then listed at the Adam Crowl, Icarus Interstellar, Australia end of the paper. Eric W. -
Quantum Coherence and Control in One-And Two-Photon Optical Systems
Quantum coherence and control in one- and two-photon optical systems Andrew J. Berglund∗ Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755, USA and Physics Division, P-23, Los Alamos National Laboratory, Los Alamos, NM 87545, USA We investigate coherence in one- and two-photon optical systems, both theoretically and ex- perimentally. In the first case, we develop the density operator representing a single photon state subjected to a non-dissipative coupling between observed (polarization) and unobserved (frequency) degrees of freedom. We show that an implementation of “bang-bang” quantum control protects pho- ton polarization information from certain types of decoherence. In the second case, we investigate the existence of a “decoherence-free” subspace of the Hilbert space of two-photon polarization states under the action of a similar coupling. The density operator representation is developed analytically and solutions are obtained numerically. [Note: This manuscript is taken from the author’s un- photon polarization-entangled state that, due to its sym- dergraduate thesis (A.B. Dartmouth College, June 2000, metry properties, is immune to collective decoherence advised by Dr. Walter E. Lawrence), an experimental of the type mentioned above. That is, this state is a and theoretical investigation under the supervision of Dr. decoherence-free subspace (DFS) of the Hilbert space of Paul G. Kwiat.1] photon polarization [6, 7]. Photon pairs entangled in both polarization and frequency degrees of freedom, such as hyper-entangled photons produced in down-conversion I. INTRODUCTION sources (see [8, 9]), further complicate this particular de- coherence mechanism . In particular, energy conserva- tion imposes frequency correlations which affect the co- Decoherence in two-state quantum systems is a sig- herence properties of these two-photon states. -
Resolution of the Ehrenfest Paradox in the Dynamic Interpretation of Lorentz Invariance F
Resolution of the Ehrenfest Paradox in the Dynamic Interpretation of Lorentz Invariance F. Winterberg University of Nevada, Reno, Nevada 89557-0058, USA Z. Naturforsch. 53a, 751-754 (1998); received July 14, 1998 In the dynamic Lorentz-Poincare interpretation of Lorentz invariance, clocks in absolute motion through a preferred reference system (resp. aether) suffer a true contraction and clocks, as a result of this contraction, go slower by the same amount. With the one-way velocity of light unobservable, there is no way this older pre-Einstein interpretation of special relativity can be tested, except in cases involv- ing rotational motion, where in the Lorentz-Poincare interpretation the interaction symmetry with the aether is broken. In this communication it is shown that Ehrenfest's paradox, the Lorentz contraction of a rotating disk, has a simple resolution in the dynamic Lorentz-Poincare interpretation of Lorentz invariance and can perhaps be tested against the prediction of special relativity. One of the oldest and least understood paradoxes of contraction. With all clocks understood as light clocks special relativity is the Ehrenfest paradox [ 1 ], the Lorentz made up of Lorentz-contraded rods, clocks in absolute contraction of a rotating disk, whereby the ratio of cir- motion go slower by the same amount. For an observer cumference of the disk to its diameter should become less in absolute motion against the preferred reference than n. The paradox gave Einstein the idea that in accel- system, the contraction and time dilation observed on an erated frames of reference the metric is non-euclidean object at rest in this reference system is there explained and that by reason of his principle of equivalence the as an illusion caused by the Lorentz contraction and time same should be true in the presence of gravitational fields. -
Lecture Notes
Solid State Physics PHYS 40352 by Mike Godfrey Spring 2012 Last changed on May 22, 2017 ii Contents Preface v 1 Crystal structure 1 1.1 Lattice and basis . .1 1.1.1 Unit cells . .2 1.1.2 Crystal symmetry . .3 1.1.3 Two-dimensional lattices . .4 1.1.4 Three-dimensional lattices . .7 1.1.5 Some cubic crystal structures ................................ 10 1.2 X-ray crystallography . 11 1.2.1 Diffraction by a crystal . 11 1.2.2 The reciprocal lattice . 12 1.2.3 Reciprocal lattice vectors and lattice planes . 13 1.2.4 The Bragg construction . 14 1.2.5 Structure factor . 15 1.2.6 Further geometry of diffraction . 17 2 Electrons in crystals 19 2.1 Summary of free-electron theory, etc. 19 2.2 Electrons in a periodic potential . 19 2.2.1 Bloch’s theorem . 19 2.2.2 Brillouin zones . 21 2.2.3 Schrodinger’s¨ equation in k-space . 22 2.2.4 Weak periodic potential: Nearly-free electrons . 23 2.2.5 Metals and insulators . 25 2.2.6 Band overlap in a nearly-free-electron divalent metal . 26 2.2.7 Tight-binding method . 29 2.3 Semiclassical dynamics of Bloch electrons . 32 2.3.1 Electron velocities . 33 2.3.2 Motion in an applied field . 33 2.3.3 Effective mass of an electron . 34 2.4 Free-electron bands and crystal structure . 35 2.4.1 Construction of the reciprocal lattice for FCC . 35 2.4.2 Group IV elements: Jones theory . 36 2.4.3 Binding energy of metals . -
A Selected Bibliography of Publications By, and About, Samuel A
A Selected Bibliography of Publications by, and about, Samuel A. Goudsmit Nelson H. F. Beebe University of Utah Department of Mathematics, 110 LCB 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 USA Tel: +1 801 581 5254 FAX: +1 801 581 4148 E-mail: [email protected], [email protected], [email protected] (Internet) WWW URL: http://www.math.utah.edu/~beebe/ 10 January 2020 Version 1.03 Title word cross-reference $3.50 [Bar30, Rid47]. 136 [Cha72]. 138 [Cha72]. 140 [Cha72]. 142 [Cha72]. g [Gou25g]. Sa [Ive10]. Z [LHLT64]. Za [Ive10]. -dependent [LHLT64]. -Werte [Gou25g]. 1947 [Hen48, Whi48]. 1952 [Gou53b]. 1953 [Gou53a]. 1964 [Gou65a]. 1978 [Bed08b, Dre79]. 1983 [Moy84]. 1987 [Lug69]. 1988 [DGS89]. 3d [Tho97]. A-Bomb [Rec91, LRD+91, Bro93, Mac85]. Abides [Gla00]. Abraham [Bed08a, Bed08b]. Absorption [ZHG36]. Abstracts [GT66a, GT68, Gou69a]. Academy [Coc77, Jew77]. accept [Ano54a]. Acceptance [Gou72b]. Account [Lan54]. Ad [Gou72a]. Affirm [ACU+54]. 1 2 Again [GT66c, Gou73e, Rai85]. Age [Lan48, Sul78, Lan59a, Lan59b, Lap59]. AIP [Ano75]. Alamos [Bet91]. Alan [Gou78b]. Alfred [Hol93a, LH93]. Allies [Hol93b]. Alsos [Gou48c, Ano12, Gou47g, Gou47h, Gou47e, Gou48c, Gou51, Gou62, Gou83, Gou96, Pas69, Pas80, Ano48a, Gue50, Hen48, Moy84, Tre83, Whi48]. ALSOS. [Rid47]. Am [Gou74b]. amend [NG70]. American [EBU+52, Gou47b]. Americans [Lan54]. Among [Tre83]. Analyses [BG32, BG68]. Analysis [Gou74a, Wer10]. Analyzed [Gou47c]. Ancient [Gou81]. Angeles [Moy84, Tre83]. Angeles/San [Tre83]. Angewandte [Gou50a]. Angle [Win89, Win87]. Angry [Gou63]. Angular [BL96, NLCS05]. Announcement [Gou58c, Gou58d, Gou58e, Gou68d]. Anomalies [GB33]. Anomalous [Ben38]. anonymity [WG67]. antiquities [RG82]. Application [Hei47a, Hei47b, MU56]. applications [Ike17]. Applied [Gou50a]. Appraisal [Hei49]. Arbeiten [Hei46]. -
Albert Einstein and Wernher Von Braun – the Two Great German-American
Albert Einstein and Wernher von Braun – the two great German-American Physicists seen in a Historical Perspective FRIEDWARDT WINTERBERG, University of Nevada Reno. Abstract It was Albert Einstein who changed our view of the universe to be a non-Euclidean curved space-time. And it was Wernher von Braun who showed how to make the first step to take us into this universe, leaving the gravitational field of our planet earth, with the landing a man on the moon the greatest event in human history. Both these great physicists did this on the shoulders of giants. Albert Einstein on the shoulders of his German landsman Bernhard Riemann, and Wernher von Braun on the shoulders of Goddard and Oberth. Both Einstein and von Braun made a Faustian pact with the devil, von Braun by accepting research funds from Hitler, and Einstein by urging Roosevelt to build the atom bomb (against Hitler). Both of these great men later regretted the use of their work for the killing of innocent bystanders, even though in the end the invention of nuclear energy and space flight is for the benefit of man. Their example serves as a warning for all of us. It can be formulated as follows: “Can I in good conscience accept research funds from the military to advance scientific knowledge, for weapons developed against an abstract enemy I never have met in person?" Weapons if used do not differentiate between the scientist, who invented these weapons, and the non-scientist. In this short essay I will show that there are many surprising parallels in the life of Albert Einstein and Wernher von Braun, the two great German-American physicists who had a decisive influence on the history of the 20th century. -
EIR Executive Intelligence Review Special Reports
EIR Executive Intelligence Review Special Reports The special reports listed below, prepared by the EIR staff, are now available. 1. Prospects for Instability in the Arabian Gulf 5. The Significance of the Shakeup at Pemex A comprehensive review of the danger of instabil EIR correctly forecast the political troubles of ity in Saudi Arabia in the coming period. Includes former Pemex director Jorge Diaz Serrano, and analysis of the Saudi military forces, and the in this report provides the full story of the recent fluence of left-wing forces, and pro-Khomeini net shakeup at Pemex.lncludes profile of new Pemex works in the country. $250. director Julio Rodolfo Moctezuma Cid, implica tions of the Pemex shakeup for the upcoming 2. Energy and Economy: Mexico in the Year 2000 presidential race, and consequences for Mexico's A development program for Mexico compiled energy policy. $200. jointly by Mexican and American scientists.Con cludes Mexico can grow at12 percent annually for 6. What is the Trilateral Commission? the next decade, creating a $100 billion capital The most complete analysis of the background, goods export market for the United States. De origins, and goals of this much-talked-about tailed analysis of key economic sectors; ideal for organization. Demonstrates the role of the com planning and marketing purposes. $250. mission in the Carter administration's Global 2000 report on mass population reduction; in the 3. Who Controls Environmentalism P-2 scandal that collapsed the Italian government A history and detailed grid of the environmental this year; and in the Federal Reserve's high ist movement in the United States. -
Sgs01fenstermacher.Pdf
- ! ,:. Sciena & Global Security, 1990, Volume I, ppo187-223 Pbotooopying permitt£d by license only Reprints available directly from the publisher C>1990 Gordon and Breach Science Publishers SoA. Printed in the United States of America The Effects of Nuclear Test-ban Regimes on Th ird -generation-wea pon I n novation Dan L. Fenstermache~ The primary reason that we are pursuing nuclear directed energy weapons is to understand the Soviets' capability to design and deploy similar weapons,which would put the US strategic deterrent force or a future defensivesystem at risk. Former US Energy Secretary John S. Herrington' It is by no means certain that a Comprehensive Test Ban would prevent the Soviets from developing a new generation of nuclear weapons, although that would assuredly be the effect of a total testing ban on the US. Former Director of Los Alamos National Laboratory, Donald Kerrt Under the rationale of assessing potential Soviet threats, several third-generation- weapon concepts are being actively studied in the US. This paper presents a technical analysis of the physical principles and likely capabilities of three nuclear directed-energy concepts (x-my lasers, nuclear kinetic-energy weapons, and micro- wave devices) and describes the implications for their development of threshold test bans at thresholds above and below 1 kiloton, Inertial Confinement Fusion, special- ized non-nuclear weapon effects simulation, and seismically quiet containment a. Center for Energy and Environmental Studies. Princeton University. Princeton. NJ 08544 Some of ftJ/s research was undertaken while on feUol,I,Shlpat ftJe Center for Science and International Affairs. Kennedy School of Government. -
Relativistic Effects on Satellite Navigation
Ž. Hećimivić Relativistički utjecaji na satelitsku navigaciju ISSN 1330-3651 (Print), ISSN 1848-6339 (Online) UDC/UDK 531.395/.396:530.12]:629.056.8 RELATIVISTIC EFFECTS ON SATELLITE NAVIGATION Željko Hećimović Subject review The base of knowledge of relativistic effects on satellite navigation is presented through comparison of the main characteristics of the Newtonian and the relativistic space time and by a short introduction of metric of a gravity field. Post-Newtonian theory of relativity is presented as a background in numerical treating of satellite navigation relativistic effects. Time as a crucial parameter in relativistic satellite navigation is introduced through coordinate and proper time as well as terrestrial time and clocks synchronization problem. Described are relativistic effects: on time dilation, on time differences because of the gravity field, on frequency, on path range effects, caused by the Earth rotation, due to the orbit eccentricity and because of the acceleration of the satellite in the theory of relativity. Overviews of treatment of relativistic effects on the GPS, GLONASS, Galileo and BeiDou satellite systems are given. Keywords: satellite navigation, GNSS, post-Newton theory of relativity, relativistic effects, GPS, GLONASS, Galileo, BeiDou Relativistički utjecaji na satelitsku navigaciju Pregledni rad Osnovna znanja o relativističkim utjecajima na satelitsku navigaciju objašnjena su usporedbom glavnih karakteristika Newtonovog i relativističkog prostora vremena te kratkim uvodom u metriku gravitacijskog polja. Post-Newtonova teorija relativnosti objašnjena je kao osnova pri numeričkoj obradi relativističkih utjecaja u području satelitske navigacije. Vrijeme, kao vrlo važan parametar u relativističkoj satelitskoj navigaciji, objašnjeno je kroz koordinatno i vlastito vrijeme te kroz terestičko vrijeme i problem sinkronizacije satova. -
Einstein's Apple: His First Principle of Equivalence
Einstein’s Apple 1 His First Principle of Equivalence August 13, 2012 Engelbert Schucking Physics Department New York University 4 Washington Place New York, NY 10003 [email protected] Eugene J. Surowitz Visiting Scholar New York University New York, NY 10003 [email protected] Abstract After a historical discussion of Einstein’s 1907 principle of equivalence, a homogeneous gravitational field in Minkowski spacetime is constructed. It is pointed out that the reference frames in gravitational theory can be understood as spaces with a flat connection and torsion defined through teleparallelism. This kind of torsion was first introduced by Einstein in 1928. The concept of torsion is discussed through simple examples and some historical observations. arXiv:gr-qc/0703149v2 9 Aug 2012 1The text of this paper has been incorporated as various chapters in a book of the same name, that is, Einstein’s Apple; which is available for download as a PDF on Schucking’s NYU Physics Department webpage http://physics.as.nyu.edu/object/EngelbertSchucking.html 1 1 The Principle of Equivalence In a speech given in Kyoto, Japan, on December 14, 1922 Albert Einstein remembered: “I was sitting on a chair in my patent office in Bern. Suddenly a thought struck me: If a man falls freely, he would not feel his weight. I was taken aback. The simple thought experiment made a deep impression on me. It was what led me to the theory of gravity.” This epiphany, that he once termed “der gl¨ucklichste Gedanke meines Lebens ” (the happiest thought of my life), was an unusual vision in 1907. -
Exploring Quantum Vacuum with Low-Energy Photons 3
August 29, 2018 8:19 WSPC/INSTRUCTION FILE paper International Journal of Quantum Information c World Scientific Publishing Company EXPLORING QUANTUM VACUUM WITH LOW-ENERGY PHOTONS E. MILOTTI,∗ F. DELLA VALLE INFN - Sez. di Trieste and Dip. di Fisica, Universit`adi Trieste via A. Valerio 2, I-34127 Trieste, Italy G. ZAVATTINI, G. MESSINEO INFN - Sez. di Ferrara and Dip. di Fisica, Universit`adi Ferrara via Saragat 1, Blocco C, I-44122 Ferrara, Italy U. GASTALDI, R. PENGO, G. RUOSO INFN - Lab. Naz. di Legnaro viale dell’Universit`a2, I-35020 Legnaro, Italy D. BABUSCI, C. CURCEANU, M. ILIESCU, C. MILARDI INFN, Laboratori Nazionali di Frascati, CP 13, Via E. Fermi 40, I-00044, Frascati (Roma), Italy Although quantum mechanics (QM) and quantum field theory (QFT) are highly suc- cessful, the seemingly simplest state – vacuum – remains mysterious. While the LHC experiments are expected to clarify basic questions on the structure of QFT vacuum, much can still be done at lower energies as well. For instance, experiments like PVLAS try to reach extremely high sensitivities, in their attempt to observe the effects of the interaction of visible or near-visible photons with intense magnetic fields – a process which becomes possible in quantum electrodynamics (QED) thanks to the vacuum fluc- tuations of the electronic field, and which is akin to photon-photon scattering. PVLAS is now close to data-taking and if it reaches the required sensitivity, it could provide arXiv:1210.6751v1 [physics.ins-det] 25 Oct 2012 important information on QED vacuum. PVLAS and other similar experiments face great challenges as they try to measure an extremely minute effect. -
1940 the Connection Between Spin and Statistics1
W. Pauli, Phys. Rev., Vol. 58, 716 1940 The Connection Between Spin and Statistics1 W. Pauli Princeton, New Jersey (Received August 19, 1940) —— ♦ —— Reprinted in “Quantum Electrodynamics”, edited by Julian Schwinger —— ♦ —— Abstract In the following paper we conclude for the relativistically invari- ant wave equation for free particles: From postulate (I), according to which the energy must be positive, the necessity of Fermi-Dirac statistics for particles with arbitrary half-integral spin; from postulate (II), according to which observables on different space-time points with a space-like distance are commutable, the necessity of Einstein-Base statistics for particles with arbitrary integral spin. It has been found useful to divide the quantities which are irreducible against Lorentz transformations into four symmetry classes which have a commutable multiplication like +1, −1, +, − with 2 = 1. 1This paper is part of a report which was prepared by the author for the Solvay Congress 1939 and in which slight improvements have since been made. In view of the unfavorable times, the Congress did not Cake place, and the publication of the reports has been postponed for an indefinite length of time. The relation between the present discussion of the connection between spin and statistics, and the somewhat less general one of Belinfante, based on the concert of charge invariance, has been cleared up by W. Pauli and J. Belinfante, Physica 7, 177 (1940). 1 § 1. UNITS AND NOTATIONS Since the requirements of the relativity theory and the quantum theory are fundamental for every theory, it is natural to use as units the vacuum velocity of light c, and Planck’s constant divided by 2π which we shall simply denote by ~.