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Antigravity Bibliography - 12

------------------------------------- Krech, Michael. The Casimir effect in critical systems / Michael Krech. Singapore ; River Edge, NJ : World Scientific, c1994. x, 253 p. : ill. ; 23 cm. LC CALL NUMBER: QC173.4.C74 K74 1994 SUBJECTS: Critical phenomena. Casimir effect. ISBN: 9810218451 Cavity quantum electrodynamics/edited by Paul R. Berman. Boston : Academic Press, c1994. xvi, 464 p. : ill. ; 24 cm. LC CALL NUMBER: QC446.2 .C38 1994 SUBJECTS: Quantum optics. Quantum electrodynamics. Casimir effect. ISBN: 0120922452 (alk. paper) Long-range Casimir forces : theory and recent experiments on atomic systems Edited by Frank S. Levin and David A. Micha. New York : Plenum Press, c1993. LC CALL NUMBER: QC680 .L63 1993 SUBJECTS: Casimir effect. ISBN: 0306443856 Physics in the making : essays on developments in 20th century physics: in honour of H.B.G. Casimir on the occasion of his 80th birthday/ edited by A. Sarlemijn and M.J. Sparnaay. Amsterdam : North-Holland; New York, N.Y., U.S.A. : Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1989. xiv, 361 p. : ill. ; 23 cm. LC CALL NUMBER: QC7 .P48 1989 SUBJECTS: Casimir, H. B. G. (Hendrik Brugt Gerhard), 1909- Casimir, H. B. G. (Hendrik Brugt Gerhard), 1909- Sarlemijn, Andries, 1936- Sparnaay, M. J. (Marcus Johannes) ISBN: 0444881212 -------------------------------------------------------------------------- Edwards-Casimir Quantum Vacuum Drive -- A hypothetical drive exploiting the peculiarities of quantum mechanics by restricting allowed wavelengths of virtual photons on one side of the drive (the bow of the ship); the pressure generated from the unrestricted virtual photons toward the aft generates a net force and propels the drive. ---------------------------------------------------------------------- CONDENSED MATTER, ABSTRACT COND-MAT/9505108 From: moraes@guinness.ias.edu (Fernando Moraes) Date: Tue, 23 May 95 17:12:35 EDT Enhancement of the magnetic moment of the electron due to a topological defect Author(s): Fernando Moraes (Institute for Advanced Study, Princeton) In the framework of the theory of defects/three-dimensional gravitation, it is obtained a positive correction to the magnetic moment of the electron bound to a disclination in a dielectric solid. With the disclination modelled as a parallel plate casimir effect. HIGH ENERGY PHYSICS - THEORY, ABSTRACT HEP-TH/9212077 From: milton@phyast.nhn.uoknor.edu (Kim Milton) Date: Fri, 11 Dec 92 16:13:13 CST MAXWELL-CHERN-SIMONS CASIMIR EFFECT, KIMBALL A. MILTON, DEPARTMENT OF PHYSICS AND ASTRONOMY, UNIVERSITY OF OKLAHOMA In odd-dimensional spaces, gauge invariance permits a Chern-Simons mass term for the gauge fields in addition to the usual Maxwell-Yang-Mills kinetic energy term. We study the Casimir effect in such a (2+1)-dimensional Abelian theory. For the case of parallel conducting lines the result is the same as for a scalar field. For the case of circular boundary conditions the results are completely different, with even the sign of the effect being opposite for Maxwell-Chern-Simons fields and scalar fields. We further examine the effect of finite temperature. The Casimir stress is found to be attractive at both low and high temperature. Possibilities of observing this effect in the laboratory are discussed. GENERAL RELATIVITY & QUANTUM COSMOLOGY, ABSTRACT GR-QC/9303038 PHYS. REV. D 48, 776 (1993) FROM: LFORD@PEARL.TUFTS.EDU Date: Wed, 31 Mar 1993 17:47 EDT MOTION OF INERTIAL OBSERVERS THROUGH NEGATIVE ENERGY, BY L.H. FORD AND THOMAS A. ROMAN, Recent research has indicated that negative energy fluxes due to quantum coherence effects obey uncertainty principle-type inequalities of the form $|\Delta E|\,{\Delta \tau} \lprox 1\,$. Here $|\Delta E|$ is the magnitude of the negative energy which is transmitted on a timescale $\Delta \tau$. Our main focus in this paper is on negative energy fluxes which are produced by the motion of observers through static negative energy regions. We find that although a quantum inequality appears to be satisfied for radially moving geodesic observers in two and four-dimensional black hole spacetimes, an observer orbiting close to a black hole will see a constant negative energy flux. In addition, we show that inertial observers moving slowly through the Casimir vacuum can achieve arbitrarily large violations of the inequality. It seems likely that, in general, these types of negative energy fluxes are not constrained by inequalities on the magnitude and duration of the flux. We construct a model of a non-gravitational stress-energy detector, which is rapidly switched on and off, and discuss the strengths and weaknesses of such a detector. GENERAL RELATIVITY & QUANTUM COSMOLOGY, ABSTRACT GR-QC/9304008 PHYS. REV. D 47, 4510 (1993). FROM: LFORD@PEARL.TUFTS.EDU Date: Tue, 6 Apr 1993 12:56 EDT SEMICLASSICAL GRAVITY THEORY AND QUANTUM FLUCTUATIONS, BY CHUNG-I KUO AND L. H. FORD. We discuss the limits of validity of the semiclassical theory of gravity in which a classical metric is coupled to the expectation value of the stress tensor. It is argued that this theory is a good approximation only when the fluctuations in the stress tensor are small. We calculate a dimensionless measure of these fluctuations for a scalar field on a flat background in particular cases, including squeezed states and the Casimir vacuum state. It is found that the fluctuations are small for states which are close to a coherent state, which describes classical behavior, but tend to be large otherwise. We find in all cases studied that the energy density fluctuations are large whenever the local energy density is negative. This is taken to mean that the gravitational field of a system with negative energy density, such as the Casimir vacuum, is not described by a fixed classical metric but is undergoing large metric fluctuations. We propose an operational scheme by which one can describe a fluctuating gravitational field in terms of the statistical behavior of test particles. For this purpose we obtain an equation of the form of the Langevin equation used to describe Brownian motion. HIGH ENERGY PHYSICS - PHENOMENOLOGY, ABSTRACT HEP-PH/9307258 From: langfeld@ptsun1.tphys.physik.uni-tuebingen.de (Kurt Langfeld) Date: Tue, 13 Jul 93 08:04:30 +0200 CASIMIR EFFECT OF STRONGLY INTERACTING SCALAR FIELDS, BY K. LANGFELD, F. SCHMUSER, AND H. REINHARDT Non-trivial $\phi ^{4}$-theory is studied in a renormalisation group invariant approach inside a box consisting of rectangular plates and where the scalar modes satisfy periodic boundary conditions at the plates. It is found that the Casimir energy exponentially approaches the infinite volume limit, the decay rate given by the scalar condensate. It therefore essentially differs from the power law of a free theory. This might provide experimental access to properties of the non-trivial vacuum. At small interplate distances the system can no longer tolerate a scalar condensate, and a first order phase transition to the perturbative phase occurs. The dependence of the vacuum energy density and the scalar condensate on the box dimensions are presented. GENERAL RELATIVITY & QUANTUM COSMOLOGY, ABSTRACT GR-QC 9310007 PHYSICA SCRIPTA 48, 649 (1993) FROM: harald@nordita.dk (Harald H. Soleng) Date: Mon, 4 Oct 93 INVERSE SQUARE LAW OF GRAVITATION IN (2+1)-DIMENSIONAL SPACE-TIME AS A CONSEQUENCE OF CASIMIR ENERGY, H. H. SOLENG, 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. HIGH ENERGY PHYSICS - THEORY, ABSTRACT HEP-TH/9312069 From: segui@cc.unizar.es Date: Thu, 9 DEC 93 13:50 GMT A MODIFIED SCHWINGER'S FORMULA FOR THE CASIMIR EFFECT, M.V. COUGO-PINTO, C. FARINA AND ANTONIO J. SEGUI-SANTONJA After briefly reviewing how the (proper-time) Schwinger's formula works for computing the Casimir energy in the case of "scalar electrodynamics" where the boundary conditions are dictated by two perfectly conducting parallel plates with separation "a" in the Z-axis, we propose a slightly modification in the previous approach based on an analytical continuation method. As we will see, for the case at hand our formula does not need the use of Poisson summation to get a (renormalized) finite result. HIGH ENERGY PHYSICS - THEORY, ABSTRACT HEP-TH/9401123 From: segui@cc.unizar.es Date: Tue, 25 JAN 94 21:47 GMT SCHWINGER'S METHOD FOR THE MASSIVE CASIMIR EFFECT, BY M.V. COUGO-PINTO, C. FARINA AND A.J. SEGUI-SANTONJA We apply to the massive scalar field a method recently proposed by Schwinger to calculate the Casimir effect. The method is applied with two different regularization schemes: the Schwinger original one by means of Poisson formula and another one by means of analytical continuation. HIGH ENERGY PHYSICS - THEORY, ABSTRACT HEP-TH/9405060 From: Shtykov Nikolay Date: Tue, 10 May 94 17:40:50 JST THE FINITE VACUUM ENERGY FOR SPINOR, SCALAR AND VECTOR FIELDS, N.SHTYKOV We compute the one-loop potential (the Casimir energy) for scalar, spinor and vectors fields on the spaces $\,R^{m+1}\, \times\,Y$ with $\,Y=\,S^N\,,CP^2$. As a physical model we consider spinor electrodynamics on four-dimensional product manifolds. We examine the cancelation of a divergent part of the Casimir energy on even-dimensional spaces by means of including the parameter $\,M$ in original action. For some models we compare our results with those found in the literature. HIGH ENERGY PHYSICS - THEORY, ABSTRACT HEP-TH/9408172 From: LFORD@PEARL.TUFTS.EDU Date: Tue, 30 Aug 1994 16:45:05 -0400 (EDT) DECOHERENCE AND VACUUM FLUCTUATIONS, L.H. FORD, TUFTS UNIVERSITY The interference pattern of coherent electrons is effected by coupling to the quantized electromagnetic field. The amplitudes of the interference maxima are changed by a factor which depends upon a double line integral of the photon two-point function around the closed path of the electrons. The interference pattern is sensitive to shifts in the vacuum fluctuations in regions from which the electrons are excluded. Thus this effect combines aspects of both the Casimir and the Aharonov-Bohm effects. The coupling to the quantized electromagnetic field tends to decrease the amplitude of the interference oscillations, and hence is a form of decoherence. The contributions due to photon emission and to vacuum fluctuations may be separately identified. It is to be expected that photon emission leads to decoherence, as it can reveal which path an electron takes. It is less obvious that vacuum fluctuations also can cause decoherence. What is directly observable is a shift in the fluctuations due, for example, to the presence of a conducting plate. In the case of electrons moving parallel to conducting boundaries, the dominant decohering influence is that of the vacuum fluctuations. The shift in the interference amplitudes can be of the order of a few percent, so experimental verification of this effect may be possible. The possibility of using this effect to probe the interior of matter, e.g., to determine the electrical conductivity of a rod by means of electrons encircling it is discussed. (Presented at the Conference on Fundamental Problems in Quantum Theory, University of Maryland, Baltimore County, June 18-22, 1994.) GENERAL RELATIVITY & QUANTUM COSMOLOGY, ABSTRACT GR-QC/9410043 PHYS. REV. D 51, 4277(1995). FROM: FORD@TUHEP.PHY.TUFTS.EDU Date: Fri, 28 Oct 1994 20:33 EST AVERAGED ENERGY CONDITIONS AND QUANTUM INEQUALITIES, L.H. FORD AND THOMAS A. ROMAN Connections are uncovered between the averaged weak (AWEC) and averaged null (ANEC) energy conditions, and quantum inequality restrictions on negative energy for free massless scalar fields. In a two-dimensional compactified Minkowski universe, we derive a covariant quantum inequality-type bound on the difference of the expectation values of the energy density in an arbitrary quantum state and in the Casimir vacuum state. From this bound, it is shown that the difference of expectation values also obeys AWEC and ANEC-type integral conditions. In contrast, it is well-known that the stress tensor in the Casimir vacuum state alone satisfies neither quantum inequalities nor averaged energy conditions. Such difference inequalities represent limits on the degree of energy condition violation that is allowed over and above any violation due to negative energy densities in a background vacuum state. In our simple two-dimensional model, they provide physically interesting examples of new constraints on negative energy which hold even when the usual AWEC, ANEC, and quantum inequality restrictions fail. In the limit when the size of the space is allowed to go to infinity, we derive quantum inequalities for timelike and null geodesics which, in appropriate limits, reduce to AWEC and ANEC in ordinary two-dimensional Minkowski spacetime. We also derive a quantum inequality bound on the energy density seen by an inertial observer in four-dimensional Minkowski spacetime. The bound implies that any inertial observer in flat spacetime cannot see an arbitrarily large negative energy density which lasts for an arbitrarily long period of time. GENERAL RELATIVITY & QUANTUM COSMOLOGY, ABSTRACT GR-QC/9411053 From: "Haret Rosu" Date: 20 Nov 94 21:15:00 CST On the assignment of frequency spectra to quantum vacuum effects, Author: Haret C. Rosu, Report: IFUG-25/94, I discuss in an introductory manner, i.e., in the form of comments on available references, the problem of assigning frequency spectra to such fundamental effects like Casimir, Hawking, Unruh, and squeezing effects. This may help to clarify their differences as well as their similarities. GENERAL RELATIVITY & QUANTUM COSMOLOGY, ABSTRACT GR-QC/9411056 From: ulvi@tapir.Caltech.EDU (Ulvi Yurtsever) Date: Mon, 21 Nov 94 15:56:11 -0800 The averaged null energy condition and difference inequalities in quantum field theory, by: Ulvi Yurtsever Recently, Larry Ford and Tom Roman have discovered that in a flat cylindrical space, although the stress-energy tensor itself fails to satisfy the averaged null energy condition (ANEC) along the (non-achronal) null geodesics, when the ``Casimir-vacuum" contribution is subtracted from the stress-energy the resulting tensor does satisfy the ANEC inequality. Ford and Roman name this class of constraints on the quantum stress-energy tensor ``difference inequalities." Here I give a proof of the difference inequality for a minimally coupled massless scalar field in an arbitrary two-dimensional spacetime, using the same techniques as those we relied on to prove ANEC in an earlier paper with Robert Wald. I begin with an overview of averaged energy conditions in quantum field theory. QUANTUM PHYSICS, ABSTRACT QUANT-PH/9502024 From: MANKO@napoli.infn.it Date: Mon, 27 Feb 1995 16:32:21 +0200 (CET) Deformation of Partical Distribution Functions due to Q-nonlinearity and Nonstationary Casimir Effect, Author: V. I. Man'ko The geometrical phase is shown to be integral of motion. Deformation of particle distribution function corresponding to nonstationary Casimir effect is expressed in terms of multivariable Hermite polynomials. Correction to Planck distribution due to q--nonlinearity is discussed. QUANTUM PHYSICS, ABSTRACT QUANT-PH/9503001 From: onofrio%38619.hepnet@Csa4.LBL.Gov Date: Wed, 1 Mar 95 08:23:43 PST Detecting Casimir Forces through a Tunneling Electromechanical Transducer Authors: Roberto Onofrio , Giovanni Carugno We propose the use of a tunneling electromechanical transducer to dinamically detect Casimir forces between two conducting surfaces. The maximum distance for which Casimir forces should be detectable with our method is around $1 \mu$m, while the lower limit is given by the ability to approach the surfaces. This technique should permit to study gravitational forces on the same range of distances, as well as the vacuum friction provided that very low dissipation mechanical resonators are used. CONDENSED MATTER THEORY, ABSTRACT COND-MAT/9505023 From: moraes@guinness.ias.edu (Fernando Moraes) Date: Fri, 5 May 95 09:35:57 EDT Casimir effect around disclinations Author: Fernando Moraes (Institute for Advanced Study, Princeton) This communication concerns the structure of the electromagnetic quantum vacuum in a disclinated insulator. It is shown that a nonzero vacuum energy density appears when the rotational symmetry of a continuous insulating elastic medium is broken by a disclination. An explicit expression is given for this Casimir energy density in terms of the parameter describing the disclination. CONDENSED MATTER THEORY, ABSTRACT COND-MAT/9505108 From: moraes@guinness.ias.edu (Fernando Moraes) Date: Tue, 23 May 95 17:12:35 EDT Enhancement of the magnetic moment of the electron due to a topological defect Author: Fernando Moraes (Institute for Advanced Study, Princeton) In the framework of the theory of defects/three-dimensional gravitation, it is obtained a positive correction to the magnetic moment of the electron bound to a disclination in a dielectric solid. QUANTUM PHYSICS, ABSTRACT QUANT-PH/9506005 From: JAEKEL Marc Date: Wed, 7 Jun 1995 16:30:40 +0200 Mechanical Effects of Radiation Pressure Quantum Fluctuations Authors: Marc-Thierry Jaekel (Laboratoire de Physique Th\'eorique de l'Ecole Normale Sup\'erieure) , Serge Reynaud (Laboratoire Kastler-Brossel) As revealed by space-time probing, mechanics and field theory come out as complementary descriptions for motions in space-time. In particular, quantum fields exert a radiation pressure on scatterers which results in mechanical effects that persist in vacuum. They include mean forces due to quantum field fluctuations, like Casimir forces, but also fluctuations of these forces and additional forces linked to motion. As in classical electron theory, a moving scatterer is submitted to a radiation reaction force which modifies its motional response to an applied force. We briefly survey the mechanical effects of quantum field fluctuations and discuss the consequences for stability of motion in vacuum and for position fluctuations. QUANTUM PHYSICS, ABSTRACT QUANT-PH/9506006 From: JAEKEL Marc Date: Wed, 7 Jun 1995 16:58:17 +0200 Quantum Fluctuations and Inertia Authors: Marc-Thierry Jaekel (Laboratoire de Physique Th\'eorique de l'Ecole Normale Sup\'erieure) , Serge Reynaud (Laboratoire Kastler-Brossel) Vacuum field fluctuations exert a radiation pressure which induces mechanical effects on scatterers. The question naturally arises whether the energy of vacuum fluctuations gives rise to inertia and gravitation in agreement with the general principles of mechanics. As a new approach to this question, we discuss the mechanical effects of quantum field fluctuations on two mirrors building a Fabry-Perot cavity. We first put into evidence that the energy related to Casimir forces is an energy stored on field fluctuations as a result of scattering time delays. We then discuss the forces felt by the mirrors when they move within vacuum field fluctuations, and show that energy stored on vacuum fluctuations contributes to inertia in conformity with the law of inertia of energy. As a further consequence, inertial masses exhibit quantum fluctuations with characteristic spectra in vacuum. QUANTUM PHYSICS, ABSTRACT QUANT-PH/9506023 From: claudia@cromwell.physics.uiuc.edu (Claudia C Eberlein) Date: Thu, 15 Jun 95 11:13:57 -0500 Sonoluminescence as quantum vacuum radiation Author: Claudia Eberlein (Dept of Physics, UIUC, Urbana, IL) Sonoluminescence is explained in terms of quantum radiation by moving interfaces between media of different polarizability. It can be considered as a dynamic Casimir effect, in the sense that it is a consequence of the imbalance of the zero-point fluctuations of the electromagnetic field during the non-inertial motion of a boundary. The transition amplitude from the vacuum into a two-photon state is calculated in a Hamiltonian formalism and turns out to be governed by the transition matrix-element of the radiation pressure. Expressions for the spectral density and the total radiated energy are given. HIGH ENERGY PHYSICS - THEORY, ABSTRACT HEP-TH/9508086 From: eli@ecm.ub.es (Emili Elizalde) Date: Fri, 18 Aug 1995 10:14:50 +0200 A precise definition of the Casimir energy, Authors: K. Kirsten , E. Elizalde The somehow arbitrary definition of the Casimir energy corresponding to a quantum system in a $d$-dimensional ultrastatic spacetime ---profusely used in the last years--- which has been critized sometimes for adopting without a sound argument the minimal subtraction scheme, is shown to be completely equivalent to the definition steming naturally from the concept of functional determinant through the zeta-function prescription. This is done by considering the theory at finite temperature and by defining then the Casimir energy as its energy in the limit $T\to 0$. The ambiguity in the coefficient $C_{d/2}$ is understood to be a result of the necessary renormalization of the free energy of the system. As an example, the Casimir energy corresponding to a general $(1+2)$-dimensional toroidal spacetime with flat spatial geometry, parametrized by the corresponding Teichm\"uller parameters, and its precise dependence on these parameters is obtained under the form of an analytic function. ------------------------------------------------------------------------ Ernest G. Cullwick. In his book "Electromagnetism and Relativity", published in 1957, was one of the first to provide an analysis of the probable coupling between EM and inertial fields. Cullwick realized that Maxwell's equations and most existing theories of electrodynamics assume that the mass of an electron is zero. At Maxwell's time this was a reasonable assumption. But it is well known today that electrons have mass, and therefore an inertial momemtum is always associated with an electric current. Cullwick suggested in his analysis that coupling terms between EM and inertia may be very small, but would likely appear sometime in the future as we go to higher current densities. And he was one of the first scientists to predict some of the odd effects which can now seen with superconductors. Cullwick was also one of the first to identify and attempt an analysis of the relativistic paradoxes and unusual effects which occur in a rotating EM field. His work still stands today as one of the only existing efforts to consider the problem of a rotating EM field. AUTHOR: Cullwick, E. G. (Ernest Geoffrey), 1903- TITLE: Electromagnetism and relativity : with particular reference to moving media and electromagnetic induction / by E. G. Cullwick. EDITION 2d ed. PUBL.: New York : J. Wiley, DATE: 1959 (2nd Edition) SUBJECT: Electromagnetic theory, Relativity (Physics) AUTHOR: Cullwick, E. G. (Ernest Geoffrey), 1903- TITLE: The fundamentals of electro-magnetism by E.G. Cullwick. EDITION 3rd ed. PUBL.: London, Cambridge U.P., DATE: 1966 (3rd Edition) SUBJECT: Electromagnetism AUTHOR: Cullwick, E. G. (Ernest Geoffrey), 1903- TITLE: The fundamentals of electro-magnetism; a restatement for engineering students and others of physical and theoretical principles in accordance with modern scientific thought, by E. Geoffrey Cullwick ... With an appendix and numerous examples on the recently adopted M.K.S. system of practical units ... PUBL.: New York, The Macmillan company; Cambridge, Eng., The University press, DATE: 1939 SUBJECT: Electromagnetism ------------------------------------------------------------------- ---End of Page 12--- -------------------------------------------------------------------Back to Main Links Page To Stirniman AG Bibliography - Page 13