[11]- [12]- [13]- [14]- [15]- [16]- [17]- [18]- [19]- [20]- [21]

Back to AntiGravity Propulsion Links Page

Page 5 of 20

Robert Stirniman's

Antigravity Bibliography - 5------------------------------------- Here are some titles by Townsend Brown: "The Wizard of Electro-Gravity: The Man Who Discovered how UFOs are powered." by William L. Moore. In UFO Report magazine. Unfortunately the issue date is not on this copy, and the magazine is at work. A lot of the same information can be found in the book "The Philadelphia Experiment: Project Invisibility" by William L. Moore with Charles Berlitz. Chapter 10 "The Force Fields of Townsend Brown". These two items are the same, I just don't know which one came first. Also there is more than one book with the title "The Philadelphia Experiment". You want the one with ISBN 0-449-20526-6. "The Townsend Brown Electro-Gravity Device: A Comprehensive Evaluation by the Office of NAVAL Research" 15 September 1952. Such as "How I Control Gravity by T. Townsend Brown" from Science and Invention Magazine Aug. 1929. "Townsend Brown and his Anti-Gravity Discs" by Gaston Burridge in Fate Magazine. No issue date is visible. "Electrical Self-Potential in Rocks" by T.Townsend Brown, some time after 1/1976, but again no source is visible. "Another Step Toward Anti-Gravity" by Gaston Burridge in The American Mercury, June 1958, p77. "Towards Flight without Stress or Strain... or Weight" by Intel, Washington, D.C. [Doesn't make since but that is what it says.] Some one just on the list here just reinvented "The Fluid Pump" by T.Townsend Brown for the Whitehall-Rand Group, Washington DC ------------------------------------------------------------------------ Paper: gr-qc/9207002 From: RCAPOVI%CINVESMX.BITNET@ricevm1.rice.edu Date: Tue, 21 Jul 1992 17:52 CST Title: Remarks on Pure Spin Connection Formulations of Gravity Authors: Riccardo Capovilla and Ted Jacobson Abstract: In the derivation of a pure spin connection action functional for gravity two methods have been proposed. The first starts from a first order lagrangian formulation, the second from a hamiltonian formulation. In this note we show that they lead to identical results for the specific cases of pure gravity with or without a cosmological constant. Paper: hep-th/9210110 (Phys. Rev. D47, R5214 (1993).) From: pullin@mail.physics.utah.edu (Jorge Pullin) Date: Tue, 20 Oct 92 11:18:14 MDT QUANTUM EINSTEIN-MAXWELL FIELDS: A UNIFIED VIEWPOINT FROM THE LOOP REPRESENTATION, R. Gambini, J. Pullin, 13pp. no figures. We propose a naive unification of Electromagnetism and General Relativity based on enlarging the gauge group of Ashtekar's new variables. We construct the connection and loop representations and analyze the space of states. In the loop representation, the wavefunctions depend on two loops, each of them carrying information about both gravitation and electromagnetism. We find that the Chern-Simons form and the Jones Polynomial play a role in the model. Paper: gr-qc/9301012 From: porrati@MAFALDA.PHYSICS.NYU.EDU (Massimo Porrati) Date: Wed, 13 Jan 93 20:17:21 -0500 Massive Spin-5/2 Fields Coupled to Gravity: Tree-Level Unitarity vs. the Equivalence Principle, Massimo Porrati, 6 pages. I show that the gravitational scattering amplitudes of a spin-5/2 field with mass $m\ll M_{Pl}$ violate tree-level unitarity at energies $\sqrt{s}\approx\sqrt{mM_{Pl}}$ if the coupling to gravity is minimal. Unitarity up to energies $\sqrt{s}\approx M_{Pl}$ is restored by adding a suitable non-minimal term, which gives rise to interactions violating the (strong) equivalence principle. These interactions are only relevant at distances $d\lequiv 1/m$. Paper: gr-qc/9303014 From: ISTVAN@RMK520.RMKI.KFKI.HU Date: Wed, 10 Mar 1993 16:24:01 +0100 (WET) MAXWELL FIELDS IN SPACETIMES ADMITTING NON-NULL KILLING VECTORS, by Istvan Racz, 7 pages,PACS numbers: 04.20.Cv, 04.20.Me, 04.40.+c We consider source-free electromagnetic fields in spacetimes possessing a non-null Killing vector field, $\xi^a$. We assume further that the electromagnetic field tensor, $F_{ab}$, is invariant under the action of the isometry group induced by $\xi^a$. It is proved that whenever the two potentials associated with the electromagnetic field are functionally independent the entire content of Maxwell's equations is equivalent to the relation $\n^aT_{ab}=0$. Since this relation is implied by Einstein's equation we argue that it is enough to solve merely Einstein's equation for these electrovac spacetimes because the relevant equations of motion will be satisfied automatically. It is also shown that for the exceptional case of functionally related potentials $\n^aT_{ab}=0$ implies along with one of the relevant equations of motion that the complementary equation concerning the electromagnetic field is satisfied. Paper: gr-qc/9310007 (Physica Scripta 48, 649 (1993)) From: harald@nordita.dk (Harald H. Soleng) Date: Mon, 4 Oct 93 13:18:04 +0100 INVERSE SQUARE LAW OF GRAVITATION IN (2+1)-DIMENSIONAL SPACE-TIME AS A CONSEQUENCE OF CASIMIR ENERGY, H. H. Soleng, 10 pages, LaTeX, Report: UPR-0540-T, To appear in Physica Scripta. The gravitational effect of vacuum polarization in space exterior to a particle in (2+1)-dimensional Einstein theory is investigated. In the weak field limit this gravitational field corresponds to an inverse square law of gravitational attraction, even though the gravitational mass of the quantum vacuum is negative. The paradox is resolved by considering a particle of finite extension and taking into account the vacuum polarization in its interior. Paper: gr-qc/9310019 From: rri!bri@rri.ernet.in (B.R.Iyer) Date: Tue, 12 Oct 93 12:44:52 IST THE FRENET SERRET DESCRIPTION OF GYROSCOPIC PRECESSION B.R.Iyer and C.V.Vishveshwara , 37 pages, Paper in Latex. The phenomenon of gyroscopic precession is studied within the framework of Frenet-Serret formalism adapted to quasi-Killing trajectories. Its relation to the congruence vorticity is highlighted with particular reference to the irrotational congruence admitted by the stationary, axisymmetric spacetime. General precession formulae are obtained for circular orbits with arbitrary constant angular speeds. By successive reduction, different types of precessions are derived for the Kerr - Schwarzschild - Minkowski spacetime family. The phenomenon is studied in the case of other interesting spacetimes, such as the De Sitter and Godel universes as well as the general stationary, cylindrical, vacuum spacetimes. Paper: gr-qc/9310030 From: khatsymovsky Date: Thu, 21 Oct 93 16:39:25 +0100 Can wormholes exist? V.Khatsymovsky, 10 pages, Plain LaTeX, preprint UUITP-20/1993 Renormalized vacuum expectation values of electromagnetic stress-energy tensor are calculated in the background spherically-symmetrical metric of the wormhole's topology. Covariant geodesic point separation method of regularization is used. Violation of the weak energy condition at the throat of wormhole takes place for geometry sufficiently close to that of infinitely long wormhole of constant radius irrespectively of the detailed form of metric. This is an argument in favour of possibility of existence of selfconsistent wormhole in empty space maintained by vacuum field fluctuations in the wormhole's background. Paper: hep-th/9402046 From: LANDI@SUHEP.PHY.SYR.EDU Date: Tue, 08 Feb 1994 15:09:39 -0500 (EST) GRAVITY AND ELECTROMAGNETISM IN NONCOMMUTATIVE GEOMETRY, Giovanni Landi, Nguyen Ai Viet, Kameshwar C.Wali, 1 + 11 pages, Report # SU-4240-566, We present a unified description of gravity and electromagnetism in the framework of a Z2 noncommutative differential calculus. It can be considered as a ``discrete version" of Kaluza-Klein theory, where the fifth continuous dimension is replaced by two discrete points. We derive an action which coincides with the dimensionally reduced one of the ordinary Kaluza-Klein theory. Paper: gr-qc/9404016 From: David Garfinkle Date: Sun, 10 Apr 1994 17:44:50 -0400 Generating new magnetic universe solutions from old. By David Garfinkle and M.A. Melvin. 17 pages In this paper we apply the techniques which have been developed over the last few decades for generating nontrivially new solutions of the Einstein-Maxwell equations from seed solutions for simple spacetimes. The simple seed spacetime which we choose is the "magnetic universe" to which we apply the Ehlers transformation. Three interesting non-singular metrics are generated. Two of these may be described as "rotating magnetic universes" and the third as an "evolving magnetic universe." Each is causally complete - in that all timelike and lightlike geodesics do not end in a finite time or affine parameter. We also give the electromagnetic field in each case. For the two rotating stationary cases we give the projection with respect to a stationary observer of the electromagnetic field into electric and magnetic components. Paper: gr-qc/9404065 (Phys. Rev. D50 (1994) 6190) From: carroll@marie.mit.edu (Sean Carroll) Date: Sun, 1 May 1994 16:35:00 -0400 Energy-Momentum Restrictions on the Creation of Gott Time Machines, by Sean M. Carroll, Edward Farhi, Alan H. Guth, and Ken D. Olum. Plain TeX, 41 pages incl. 9 figures. MIT-CTP #2252. The discovery by Gott of a remarkably simple spacetime with closed timelike curves (CTC's) provides a tool for investigating how the creation of time machines is prevented in classical general relativity. The Gott spacetime contains two infinitely long, parallel cosmic strings, which can equivalently be viewed as point masses in (2+1)-dimensional gravity. We examine the possibility of building such a time machine in an open universe. Specifically, we consider initial data specified on an edgeless, noncompact, spacelike hypersurface, for which the total momentum is timelike (i.e., not the momentum of a Gott spacetime). In contrast to the case of a closed universe (in which Gott pairs, although not CTC's, can be produced from the decay of stationary particles), we find that there is never enough energy for a Gott-like time machine to evolve from the specified data; it is impossible to accelerate two particles to sufficiently high velocity. Thus, the no-CTC theorems of Tipler and Hawking are enforced in an open (2+1)-dimensional universe by a mechanism different from that which operates in a closed universe. In proving our result, we develop a simple method to understand the inequalities that restrict the result of combining momenta in (2+1)-dimensional gravity. Paper: gr-qc/9405050 From: MATSAS@IFT.UESP.ANSP.BR Date: Mon, 23 May 1994 15:01 BSC (-0300 C) DO INERTIAL ELECTRIC CHARGES RADIATE WITH RESPECT TO UNIFORMLY ACCELERATED OBSERVERS?, George E.A. Matsas, 6 pages (REVTEX 3.0), IFT-P017/94. We revisit the long standing problem of analyzing an inertial electric charge from the point of view of uniformly accelerated observers in the context of semi-classical gravity. We choose a suitable set of accelerated observers with respect to which there is no photon emission coming from the inertial charge. We discuss this result against previous claims [F. Rohrlich, Ann. Phys. (N.Y.) vol: 22, 169 (1963)]. (This Essay was awarded a Honorable Mention for 1994 by the Gravity Research Foundation.) Paper: gr-qc/9406032 From: wam@tdo-serv.lanl.gov (Warner A. Miller) Date: Mon, 20 Jun 94 14:44:42 MDT Spin Dynamics of the LAGEOS Satellite in Support of a Measurement of the Earth's Gravitomagnetism, Salman Habib, Daniel E. Holz, Arkady Kheyfets, Richard A. Matzner, Warner A. Miller and Brian W. Tolman, 16 pages, RevTeX, LA-UR-94-1289. (Part I of II, postscript figures in Part II). LAGEOS is an accurately-tracked, dense spherical satellite covered with 426 retroreflectors. The tracking accuracy is such as to yield a medium term (years to decades) inertial reference frame determined via relatively inexpensive observations. This frame is used as an adjunct to the more difficult and data intensive VLBI absolute frame measurements. There is a substantial secular precession of the satellite's line of nodes consistent with the classical, Newtonian precession due to the non-sphericity of the earth. Ciufolini has suggested the launch of an identical satellite (LAGEOS-3) into an orbit supplementary to that of LAGEOS-1: LAGEOS-3 would then experience an equal and opposite classical precession to that of LAGEOS-1. Besides providing a more accurate real-time measurement of the earth's length of day and polar wobble, this paired-satellite experiment would provide the first direct measurement of the general relativistic frame-dragging effect. Of the five dominant error sources in this experiment, the largest one involves surface forces on the satellite, and their consequent impact on the orbital nodal precession. The surface forces are a function of the spin dynamics of the satellite. Consequently, we undertake here a theoretical effort to model the spin ndynamics of LAGEOS. In this paper we present our preliminary results. Paper: gr-qc/9407003 From: William Bruckman Date: Tue, 5 Jul 94 09:06:49 EDT Generation of Electro and Magneto Static Solutions of the Scalar-Tensor Theories of Gravity, William Bruckman, 28 pages, LaTeX. The field equations of the scalar-tensor theories of gravitation are presented in different representations, related to each other by conformal transformations of the metric. One of the representations resembles the Jordan-Brans-Dicke theory, and is the starting point for the generation of exact electrostatic and magnetostatic exterior solutions. The corresponding solutions for each specific theory can be obtained by transforming back to the original canonical representation, and the conversions are given for the theories of Jordan-Brans-Dicke, Barker, Schwinger, and conformally invariant coupling. The electrostatic solutions represent the exterior metrics and fields of configurations where the gravitational and electric equipotential surfaces have the same symmetry. A particular family of electrostatic solutions is developed, which includes as special case the spherically symmetric solutions of the scalar-tensor theories. As expected, they reduce to the well-known Reissner-Nordstrom metric when the scalar field is set equal to a constant. The analysis of the Jordan-Brans-Dicke metric yields an upper bound for the mass-radius ratio of static stars, for a class of interior structures. Paper: gr-qc/9407030 From: Marco SISSA +39(40)3787522 Date: Thu, 21 Jul 1994 15:10:04 +0200 QUANTUM ELECTROMAGNETIC WORMHOLES AND GEOMETRICAL DESCRIPTION OF THE ELECTRIC CHARGE by Marco Cavaglia 13 pages, PLAIN TEX, Report No: SISSA 92/94/A (to appear in Phys. Rev. D15). I present and discuss a class of solutions of the Wheeler-de Witt equation describing wormholes generated by coupling of gravity to the electromagnetic field for Kantowski-Sachs and Bianchi I spacetimes. Since the electric charge can be viewed as electric lines of force trapped in a finite region of spacetime, these solutions can be interpreted as the quantum corresponding of the Ein-stein--Rosen--Misner--Wheeler electromagnetic geon. Paper: gr-qc/9409060 (Annals of Physics vol. 240 432--458 (1995)) From: soleng@surya11.cern.ch (Harald SOLENG) Date: Thu, 29 Sep 94 14:01:03 +0100 Modification of the Coulomb potential from a Kaluza-Klein model with a Gauss-Bonnet term in the action, by H. H. Soleng and O. Gron, 27 pages, compressed and uuencoded postscript file with unpacking instructions; major revision to section IV.D.2 on pages 15-16 ("Corrections to the Coulomb potential at short distances") and to the figure on page 27, to be published in The Annals of Physics (NY), NORDITA 94/50 In four dimensions a Gauss-Bonnet term in the action corresponds to a total derivative, and it does not contribute to the classical equations of motion. For higher-dimensional geometries this term has the interesting property (shared with other dimensionally continued Euler densities) that when the action is varied with respect to the metric, it gives rise to a symmetric, covariantly conserved tensor of rank two which is a function of the metric and its first and second order derivatives. Here we review the unification of General Relativity and electromagnetism in the classical five-dimensional, restricted (with g55 = 1) Kaluza-Klein model. Then we discuss the modifications of the Einstein-Maxwell theory that results from adding the Gauss-Bonnet term in the action. The resulting four-dimensional theory describes a non-linear U(1) gauge theory non-minimally coupled to gravity. For a point charge at rest, we find a perturbative solution for large distances which gives a mass-dependent correction to the Coulomb potential. Near the source we find a power-law solution which seems to cure the short-distance divergency of the Coulomb potential. Possible ways to obtain an experimental upper limit to the coupling of the hypothetical Gauss-Bonnet term are also considered. Paper: hep-th/9410046 From: M.J. Duff Date: Fri, 7 Oct 94 13:04:15 BST KALUZA-KLEIN THEORY IN PERSPECTIVE, M. J. Duff, 38 pages latex, NI-94-015 The Kaluza-Klein idea of extra spacetime dimensions continues to pervade current attempts to unify the fundamental forces, but in ways somewhat different from that originally envisaged. We present a modern perspective on the role of internal dimensions in physics, focussing in particular on superstring theory. A novel result is the interpretation of Kaluza-Klein string states as extreme black holes.(Talk delivered at the Oskar Klein Centenary Nobel Symposium, Stockholm, September 19-21, 1994.) Paper: gr-qc/9509018 From: nunez@venus.fisica.unlp.edu.ar (NUNEZ Carlos) Date: Fri, 8 Sep 95 15:05:13 EST Title: On Pseudospherically Symmetric Repulsive Gravitational Field Authors: Luis A. Anchordoqui, Graciela S. Birman, Jose D. Edelstein and Carlos Nunez Report-no: La Plata-Th 95/23 The solution of Einstein vacuum equation, for a static pseudospherically symmetric system, is presented. It describes a singular solution that produces a repulsive gravitational field with an event horizon. We analyse particle motion in such a gravitational field and comment on some interesting features of the solution. -------------------------------------------------------------------------- "The Origin of the Electromagnetic Interaction in Einstien's Unified Field Theory", Antoci,S. General Relativity and Gravitation, Vol 23 No 1, 1991 Recently it has been shown that, if sources are appended in a certain way to the field equations of Einstein's unified theory, the contracted Bianchi identities and the field operations appear endowed with definite physical meaning. The theory looks like a gravoelectrodynamics in a polarizable Riemmannian continuum. The wealth of the implied possibilities is far richer than in the so-called Einstein-Maxwell theory. ------------------------------------------------------------------- ---End of Page 5--- -------------------------------------------------------------------

Back to Main Links Page To Stirniman AG Bibliography - Page 6