Journal articles: 'Electromagnetism and gravity'

1

Casey, Terry. "Gravity and electromagnetism." Physics Essays 29, no. 2 (June 15, 2016): 237–38. http://dx.doi.org/10.4006/0836-1398-29.2.237.

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Costa, L. Filipe O., and Carlos A. R. Herdeiro. "Reference frames and the physical gravito-electromagnetic analogy." Proceedings of the International Astronomical Union 5, S261 (April 2009): 31–39. http://dx.doi.org/10.1017/s1743921309990111.

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AbstractThe similarities between linearized gravity and electromagnetism are known since the early days of General Relativity. Using an exact approach based on tidal tensors, we show that such analogy holds only on very special conditions and depends crucially on the reference frame. This places restrictions on the validity of the “gravito-electromagnetic” equations commonly found in literature.

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SPANIOL, E. P., and V. C. DE ANDRADE. "GRAVITOMAGNETISM IN TELEPARALLEL GRAVITY." International Journal of Modern Physics D 19, no. 04 (April 2010): 489–505. http://dx.doi.org/10.1142/s0218271810016476.

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The assumption that matter charges and currents could generate fields, which are called, in analogy with electromagnetism, gravitoeletric and gravitomagnetic fields, dating from the origins of General Relativity (GR). On the other hand, the Teleparallel Equivalent of GR (TEGR), as a gauge theory, seems to be the ideal scenario to define these fields, based on the gauge field strength components. The purpose of the present work is to investigate the nature of the gravitational electric and magnetic fields in the context of the TEGR, where the tetrad formalism on which it is based seems more suited to deal with phenomena related to observers. As its applications, we have studied the gravito-electromagnetic fields for the Schwarzschild solution and for the geometry produced by a spherical rotating shell in slow motion and weak field regime. The expressions obtained, at the linear regime, are very similar to those of electromagnetism.

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YANG, HYUN SEOK. "EMERGENT GRAVITY FROM NONCOMMUTATIVE SPACE–TIME." International Journal of Modern Physics A 24, no. 24 (September 30, 2009): 4473–517. http://dx.doi.org/10.1142/s0217751x0904587x.

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We showed before that self-dual electromagnetism in noncommutative (NC) space–time is equivalent to self-dual Einstein gravity. This result implies a striking picture about gravity: gravity can emerge from electromagnetism in NC space–time. Gravity is then a collective phenomenon emerging from gauge fields living in fuzzy space–time. We elucidate in some detail why electromagnetism in NC space–time should be a theory of gravity. In particular, we show that NC electromagnetism is realized through the Darboux theorem as a diffeomorphism symmetry G which is spontaneously broken to symplectomorphism H due to a background symplectic two-form Bμν = (1/θ)μν, giving rise to NC space–time. This leads to a natural speculation that the emergent gravity from NC electromagnetism corresponds to a nonlinear realization G/H of the diffeomorphism group, more generally its NC deformation. We also find some evidences that the emergent gravity contains the structures of generalized complex geometry and NC gravity. To illuminate the emergent gravity, we illustrate how self-dual NC electromagnetism nicely fits with the twistor space describing curved self-dual space–time. We also discuss derivative corrections of Seiberg–Witten map which give rise to higher-order gravity.

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POPŁAWSKI, NIKODEM J. "GRAVITATION, ELECTROMAGNETISM AND THE COSMOLOGICAL CONSTANT IN PURELY AFFINE GRAVITY." International Journal of Modern Physics D 18, no. 05 (May 2009): 809–29. http://dx.doi.org/10.1142/s0218271809014777.

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The Eddington Lagrangian in the purely affine formulation of general relativity generates the Einstein equations with the cosmological constant. The Ferraris–Kijowski purely affine Lagrangian for the electromagnetic field, which has the form of the Maxwell Lagrangian with the metric tensor replaced by the symmetrized Ricci tensor, is dynamically equivalent to the Einstein–Maxwell Lagrangian in the metric formulation. We show that the sum of the two affine Lagrangians is dynamically inequivalent to the sum of the analogous Lagrangians in the metric–affine/metric formulation. We also show that such a construction is valid only for weak electromagnetic fields. Therefore the purely affine formulation that combines gravitation, electromagnetism and the cosmological constant cannot be a simple sum of terms corresponding to separate fields. Consequently, this formulation of electromagnetism seems to be unphysical, unlike the purely metric and metric–affine pictures, unless the electromagnetic field couples to the cosmological constant.

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Lal, Ashwini Kumar. "On Planetary Electromagnetism and Gravity." International Journal of Astronomy and Astrophysics 01, no. 02 (2011): 62–66. http://dx.doi.org/10.4236/ijaa.2011.12009.

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7

Itin, Yakov. "Coframe geometry, gravity and electromagnetism." Journal of Physics: Conference Series 437 (April 22, 2013): 012003. http://dx.doi.org/10.1088/1742-6596/437/1/012003.

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Balaci, Octavian. "Connection between Gravity and Electromagnetism." Astronomical Review 8, no. 4 (January 2013): 1–25. http://dx.doi.org/10.1080/21672857.2013.11519726.

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Balaci, Octavian. "Connection between Gravity and Electromagnetism." Astronomical Review 9, no. 1 (January 2014): 4–28. http://dx.doi.org/10.1080/21672857.2014.11519728.

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Balaci, Octavian. "Connection between Gravity and Electromagnetism." Astronomical Review 9, no. 2 (April 2014): 4–28. http://dx.doi.org/10.1080/21672857.2014.11519731.

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Demir, Süleyman, Murat Tanişli, and Mustafa Emre Kansu. "Octonic massless field equations." International Journal of Modern Physics A 30, no. 15 (May 26, 2015): 1550084. http://dx.doi.org/10.1142/s0217751x15500840.

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In this paper, it is proven that the associative octons including scalar, pseudoscalar, pseudovector and vector values are convenient and capable tools to generalize the Maxwell–Dirac like field equations of electromagnetism and linear gravity in a compact and simple way. Although an attempt to describe the massless field equations of electromagnetism and linear gravity needs the sixteen real component mathematical structures, it is proved that these equations can be formulated in terms of eight components of octons. Furthermore, the generalized wave equation in terms of potentials is derived in the presence of electromagnetic and gravitational charges (masses). Finally, conservation of energy concept has also been investigated for massless fields.

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Landi, Giovanni, Nguyen Ai Viet, and Kameshwar C. Wali. "Gravity and electromagnetism in noncommutative geometry." Physics Letters B 326, no. 1-2 (April 1994): 45–50. http://dx.doi.org/10.1016/0370-2693(94)91190-8.

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Köplinger, Jens. "Gravity and electromagnetism on conic sedenions." Applied Mathematics and Computation 188, no. 1 (May 2007): 948–53. http://dx.doi.org/10.1016/j.amc.2006.10.050.

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Ni, Wei-Tou. "A nonmetric theory of gravity." International Journal of Modern Physics D 25, no. 11 (October 2016): 1640017. http://dx.doi.org/10.1142/s0218271816400174.

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A nonmetric theory of gravity is presented, which agrees with all experiments to date. It possesses a Lagrangian-based nonmetric (i.e. nonminimum) coupling between electromagnetism and gravity which has complete continuous-coordinate-transformation symmetry but violates parity and time-reversal-invariance. The theory predicts the universality of free fall for test bodies, i.e. it obeys the Weak Equivalence Principle (WEP). But due to the nonmetrical coupling between electromagnetism and gravity, it violates the Einstein Equivalence Principle (EEP). Hence, this theory disproves the conjecture due to Schiff which states that any gravitation theory that obeys the WEP must also, unavoidably, obey the EEP. Further examination of the empirical status implications of the EEP is therefore urged.

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GOULART, E., and F. T. FALCIANO. "FORMAL ANALOGIES BETWEEN GRAVITATION AND ELECTRODYNAMICS." International Journal of Modern Physics A 24, no. 24 (September 30, 2009): 4589–605. http://dx.doi.org/10.1142/s0217751x0904628x.

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We develop a theoretical framework that allows us to compare electromagnetism with gravitation in a fully covariant way. This new scenario does not rely on any kind of approximation nor associate objects with different operational meaning as it is sometimes done in the literature. We construct the electromagnetic analogue to Riemann and Weyl tensors and develop the equations of motion for these objects. In particular, we are able to identify precisely how and in what conditions gravity can be mapped to electrodynamics. As a consequence, many of the geometrical tools of General Relativity can be applied to electromagnetism and vice versa. We hope our results would shed new light in the nature of electromagnetic and gravitational theories.

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UNNIKRISHNAN, C. S., and G. T. GILLIES. "GRAVITO-ELECTROMAGNETISM: GLIMPSES OF UNEXPLORED DEEP CONNECTIONS." International Journal of Modern Physics D 13, no. 10 (December 2004): 2321–27. http://dx.doi.org/10.1142/s0218271804006395.

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Any attempt at unification of the fundamental interactions will recognize its 'right path' when electromagnetism and gravity are seen together as manifestations of the same interaction. First excitement along this direction was the Kaluza–Klein program, and the unsuccessful attempt was Einstein's unified field theory. Over the years, the program has changed much, but the basic idea that there are links between gravity and electromagnetism, perhaps in a higher dimensional world, has not changed. There are several interesting and important phenomenological aspects related to this issue, to be experimentally explored at the classical level, which may reveal some of the deep connections between the two long range interactions. In this essay, we discuss a program to experimentally explore some connections between gravity and electromagnetism, not yet adequately studied. Some of the key issues we address are the complete absence of gravity for electrons inside a metal drift tube (Schiff–Barnhill effect) and its rotational variant, the Schuster–Blackett relation between rotation of neutral matter and generation of magnetic fields, and a variation of the Faraday unipolar induction. These experiments that probe macroscopic, low energy, and seemingly classical aspects, have the potential to reveal underlying microscopic, high energy, unification scale quantum connections between gravity and electromagnetism.

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WANAS, M. I., and SAMAH A. AMMAR. "SPACETIME STRUCTURE AND ELECTROMAGNETISM." Modern Physics Letters A 25, no. 20 (June 28, 2010): 1705–21. http://dx.doi.org/10.1142/s0217732310032883.

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Two Lagrangian functions are used to construct geometric field theories. One of these Lagrangians depends on the curvature of space, while the other depends on curvature and torsion. It is shown that the theory constructed from the first Lagrangian gives rise to pure gravity, while the theory constructed using the second Lagrangian gives rise to both gravity and electromagnetism. The two theories are constructed in a version of absolute parallelism geometry in which both curvature and torsion are, simultaneously, nonvanishing. One single geometric object, W-tensor, reflecting the properties of curvature and torsion, is defined in this version and is used to construct the second theory. The main conclusion is that a necessary condition for geometric representation of electromagnetism is the presence of a nonvanishing torsion in the geometry used.

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NI, WEI-TOU, HSIEN-HAO MEI, and SHAN-JYUN WU. "FOUNDATIONS OF CLASSICAL ELECTRODYNAMICS, EQUIVALENCE PRINCIPLE AND COSMIC INTERACTIONS: A SHORT EXPOSITION AND AN UPDATE." Modern Physics Letters A 28, no. 03 (January 23, 2013): 1340013. http://dx.doi.org/10.1142/s0217732313400130.

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We look at the foundations of electromagnetism in this 1st LeCosPA Symposium. For doing this, after some review (constraints on photon mass etc.), we use two approaches. The first one is to formulate a Parametrized Post-Maxwellian (PPM) framework to include QED corrections and a pseudoscalar photon interaction. PPM framework includes lowest corrections to unified electromagnetism-gravity theories based on connection approach. It may also overlap with corrections implemented from generalized uncertainty principle (GUP) when electromagnetism-gravity coupling is considered. We discuss various vacuum birefringence experiments — ongoing and proposed — to measure these parameters. The second approach — the χ-g framework is to look at electromagnetism in gravity and various experiments and observations to determine its empirical foundation. The SME (Standard Model Extension) and SMS (Standard Model Supplement) overlap with the χ-g framework in their photon sector. We found that the foundation is solid with the only exception of a potentially possible pseudoscalar-photon interaction. We discussed its experimental constraints and look forward to more future experiments.

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19

Hutchin, Richard A. "A Natural Combination of Gravity and Electromagnetism." Journal of Modern Physics 06, no. 06 (2015): 749–57. http://dx.doi.org/10.4236/jmp.2015.66080.

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20

Itin, Yakov. "Premetric representation of mechanics, electromagnetism and gravity." International Journal of Geometric Methods in Modern Physics 15, supp01 (November 2018): 1840002. http://dx.doi.org/10.1142/s0219887818400029.

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The premetric formalism is an alternative representation of a classical field theory in which the field equations are formulated without the spacetime metric. Only the constitutive relations between the basic field variables can involve the metric of the underlying manifold. In this paper, we present a brief pedagogical review of the premetric formalism in mechanics, electromagnetism, and gravity.

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21

Jones, Preston, and Douglas Singleton. "Interaction between gravitational radiation and electromagnetic radiation." International Journal of Modern Physics D 28, no. 06 (April 2019): 1930010. http://dx.doi.org/10.1142/s0218271819300106.

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In this review paper, we investigate the connection between gravity and electromagnetism from Faraday to the present day. The particular focus is on the connection between gravitational and electromagnetic radiation. We discuss electromagnetic radiation produced when a gravitational wave passes through a magnetic field. We then discuss the interaction of electromagnetic radiation with gravitational waves via Feynman diagrams of the process [Formula: see text]. Finally, we review recent work on the vacuum production of counterpart electromagnetic radiation by gravitational waves.

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22

Mannheim, Philip D. "Conformal invariance and the metrication of the fundamental forces." International Journal of Modern Physics D 25, no. 12 (October 2016): 1644003. http://dx.doi.org/10.1142/s021827181644003x.

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We revisit Weyl’s metrication (geometrization) of electromagnetism. We show that by making Weyl’s proposed geometric connection be pure imaginary, not only are we able to metricate electromagnetism, an underlying local conformal invariance makes the geometry be strictly Riemannian and prevents observational gravity from being complex. Via torsion, we achieve an analogous metrication for axial-vector fields. We generalize our procedure to Yang–Mills theories, and achieve a metrication of all the fundamental forces. Only in the gravity sector does our approach differ from the standard picture of fundamental forces, with our approach requiring that standard Einstein gravity be replaced by conformal gravity. We show that quantum conformal gravity is a consistent and unitary quantum gravitational theory, one that, unlike string theory, only requires four spacetime dimensions.

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Krori, K. D., and Anuradha Das Purkayastha. "String-modified four–dimensional cosmology." Canadian Journal of Physics 70, no. 2-3 (February 1, 1992): 179–82. http://dx.doi.org/10.1139/p92-024.

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Recently Gegenberg proposed a string-modified four-dimensional gravity theory comprising gravity, electromagnetism, a dilaton field, and a Kalb–Ramond field. In this paper, some general cosmological aspects of this theory are discussed.

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Becker, Maria, Adam Caprez, and Herman Batelaan. "On the Classical Coupling between Gravity and Electromagnetism." Atoms 3, no. 3 (June 30, 2015): 320–38. http://dx.doi.org/10.3390/atoms3030320.

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Andreev, V. A., and D. Yu Tsipenyuk. "The 5-dimensional model for electromagnetism and gravity." Natural Science 06, no. 04 (2014): 248–53. http://dx.doi.org/10.4236/ns.2014.64028.

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26

Chen, Bin. "Gravity with Electromagnetism on M 4 × Z 2." Communications in Theoretical Physics 27, no. 4 (June 15, 1997): 497–500. http://dx.doi.org/10.1088/0253-6102/27/4/497.

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27

Beach, Raymond J. "A Classical Field Theory of Gravity and Electromagnetism." Journal of Modern Physics 05, no. 10 (2014): 928–39. http://dx.doi.org/10.4236/jmp.2014.510096.

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POPŁAWSKI, NIKODEM J. "GEOMETRIZATION OF ELECTROMAGNETISM IN TETRAD-SPIN-CONNECTION GRAVITY." Modern Physics Letters A 24, no. 06 (February 28, 2009): 431–42. http://dx.doi.org/10.1142/s0217732309030151.

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The metric-affine Lagrangian of Ponomarev and Obukhov for the unified gravitational and electromagnetic fields is linear in the Ricci scalar and quadratic in the tensor of homothetic curvature. We apply to this Lagrangian the variational principle with the tetrad and spin connection as dynamical variables and show that, in this approach, the field equations are the Einstein–Maxwell equations if we relate the electromagnetic potential to the trace of the spin connection. We also show that, as in the Ponomarev–Obukhov formulation, the generally covariant Dirac Lagrangian gives rise to the standard spinor source for the Einstein–Maxwell equations, while the spinor field obeys the nonlinear Heisenberg–Ivanenko equation with the electromagnetic coupling. We generalize that formulation to spinors with arbitrary electric charges.

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FINSTER, FELIX, JOEL SMOLLER, and SHING-TUNG YAU. "THE COUPLING OF GRAVITY TO SPIN AND ELECTROMAGNETISM." Modern Physics Letters A 14, no. 16 (May 30, 1999): 1053–57. http://dx.doi.org/10.1142/s0217732399001115.

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The coupled Einstein–Dirac–Maxwell equations are considered for a static, spherically symmetric system of two fermions in a singlet spinor state. Stable soliton-like solutions are shown to exist, and we discuss the regularizing effect of gravity from a Feynman diagram point of view.

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Brandenburg, John E. "A model cosmology based on gravity-electromagnetism unification." Astrophysics and Space Science 227, no. 1-2 (May 1995): 133–44. http://dx.doi.org/10.1007/bf00678073.

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31

Lynden-Bell, D., J. Bicák, and J. Katz. "On Accelerated Inertial Frames in Gravity and Electromagnetism." Annals of Physics 271, no. 1 (January 1999): 1–22. http://dx.doi.org/10.1006/aphy.1998.5869.

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32

Light, Gregory L. "Gravity as the Sole Fundamental Force." Applied Physics Research 11, no. 3 (April 4, 2019): 23. http://dx.doi.org/10.5539/apr.v11n3p23.

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We had explained electromagnetism by gravity before a recent publication in this Journal, in which we further incorporated the nuclear strong force in the framework of gravity. This paper, summarizing our cumulative results, continues to integrate the nuclear weak force with gravity, where we go by the following line of logic: Planck’s formula shows energy E = frequency = probability = wave; hence quantum waves have energies and the Universe is a diagonal spacetime manifold containing {(particle pi, electromagnetic wave λ (pi))}. By Feynman’s analysis on electromagnetic mass, we assume that the distribution of E over (p, λ (p)) is (3/4 , 1/4)E. Then Newton’s gravitational acceleration formula yields E = 1.6 × the observed energy o f p, so that p exists only for a duration of 5/8 λ/c over the cycle [0, λ/c], such as evidenced in quantum tunneling, opening the possibility for λ (p) to be combined with other waves forming new particle(s) for t > 58/ λ/c. By the time ratios of two frames in General Relativity we deduce neutron’s lifetime, and by the Higgs mechanism we show neutron’s decay products.

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HAMMOND, RICHARD T. "SPIN FROM THE NONSYMMETRIC METRIC TENSOR." International Journal of Modern Physics D 22, no. 12 (October 2013): 1342009. http://dx.doi.org/10.1142/s0218271813420091.

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A solution to the gravitational field equations based on a nonsymmetric metric tensor is examined. Unlike Einstein's interpretation of electromagnetism, or Moffat's generalized gravity, it is shown that the nonsymmetric part of the metric tensor is the potential of the spin field, and its intimate connection to string theory is established. This formulation solves the longstanding problem of electromagnetism and torsion, naturally showing how electromagnetism, through its intrinsic spin, can create torsion.

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Chanda, Sumanto, Partha Guha, and Raju Roychowdhury. "Schwarzschild instanton in emergent gravity." International Journal of Geometric Methods in Modern Physics 14, no. 01 (December 20, 2016): 1750006. http://dx.doi.org/10.1142/s0219887817500062.

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In the bottom-up approach of emergent gravity, we attempt to find symplectic gauge fields emerging from Euclidean Schwarzschild instanton, which is studied as electromagnetism defined on the symplectic space [Formula: see text]. Geometrical engineering with the emergent metric sets up the Seiberg–Witten map between commutative and non-commutative gauge fields, preparing the ground for the evaluation of topological invariants in terms of the underlying gauge theory quantities.

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Jiang, Wanchun, Mengxiao Sun, Kun Zhang, Xiaoqing Dai, Yilu Xia, Derong Wang, Aming Xie, and Fan Wu. "Using γ-Fe2O3 to tune the electromagnetic properties of three-dimensional (3D) polypyrrole (PPy) and its broadband electromagnetic absorber." RSC Advances 6, no. 72 (2016): 68128–33. http://dx.doi.org/10.1039/c6ra11235h.

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36

Janssen, Bert, and Alejandro Jiménez-Cano. "Projective symmetries and induced electromagnetism in metric-affine gravity." Physics Letters B 786 (November 2018): 462–65. http://dx.doi.org/10.1016/j.physletb.2018.10.032.

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37

Brandenburg, J. E. "Unification of gravity and electromagnetism in the plasma universe." IEEE Transactions on Plasma Science 20, no. 6 (1992): 944–57. http://dx.doi.org/10.1109/27.199556.

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Popławski, N. J. "Erratum: GEOMETRIZATION OF ELECTROMAGNETISM IN TETRAD-SPIN-CONNECTION GRAVITY." Modern Physics Letters A 26, no. 16 (May 30, 2011): 1243. http://dx.doi.org/10.1142/s0217732311036024.

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VOICU, NICOLETA. "TIDAL TENSORS IN THE DESCRIPTION OF GRAVITY AND ELECTROMAGNETISM." Journal of Nonlinear Mathematical Physics 19, no. 2 (January 2012): 269–84. http://dx.doi.org/10.1142/s1402925112500180.

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Popławski, Nikodem J. "Gravitation, Electromagnetism and Cosmological Constant in Purely Affine Gravity." Foundations of Physics 39, no. 3 (February 19, 2009): 307–30. http://dx.doi.org/10.1007/s10701-009-9284-y.

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Ramandi, Gh Fasihi. "A Geometric Framework for Unification of Gravity and Electromagnetism." Gravitation and Cosmology 27, no. 2 (April 2021): 113–19. http://dx.doi.org/10.1134/s0202289321020110.

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Shaw, Duncan W. "On Maxwell’s 1865 theory of aether: A step toward unity." Physics Essays 33, no. 3 (September 17, 2020): 256–67. http://dx.doi.org/10.4006/0836-1398-33.3.256.

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This article proposes that James Clerk Maxwell’s theory of the medium of aether, published in 1865, provides a significant step toward the unification of gravity, electromagnetism, quantum mechanics, and entanglement.

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Babenko, I. A., and Yu S. Vladimirov. "RELATIONAL LOOK ON THE PRINCIPLES OF THE GEOMETRIC PARADIGM." Metafizika, no. 3 (December 15, 2020): 69–81. http://dx.doi.org/10.22363/2224-7580-2020-3-69-81.

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The article compares the descriptions of gravitational and electromagnetic interactions in two physical and theoretical paradigms: geometric and relational. On the one hand, the general theory of relativity and the 5-dimensional geometric theory of Kaluza and, on the other hand, the relational theory of electro-gravity are compared. The comparison describes the parallel manifestations of all the “four miracles” of Salam in two physical and theoretical approaches. Based on the relational concepts, it is shown that three types of the considered interactions - electromagnetic, scalar and gravitational - in the theory of electrogravity have a derivative character from electromagnetism. The idea is expressed that in the twentieth century, physics could develop mainly within the framework of the relational paradigm.

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Casey, Terence W. "A Mathematical Approach to the Unification of Gravity and Electromagnetism." Physics Essays 2, no. 3 (September 1, 1989): 306–9. http://dx.doi.org/10.4006/1.3035884.

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Fasihi-Ramandi, Gh. "Semi-symmetric connection formalism for unification of gravity and electromagnetism." Journal of Geometry and Physics 144 (October 2019): 245–50. http://dx.doi.org/10.1016/j.geomphys.2019.06.005.

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46

Aymaz, İsmail, and Mustafa Emre Kansu. "Dual-complex quaternion representation of gravitoelectromagnetism." International Journal of Geometric Methods in Modern Physics 18, no. 11 (July 7, 2021): 2150178. http://dx.doi.org/10.1142/s0219887821501784.

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In this paper, we propose the generalized description of electromagnetism and linear gravity based on the combined dual numbers and complex quaternion algebra. In this approach, the electromagnetic and gravitational fields can be considered as the components of one combined dual-complex quaternionic field. It is shown that all relations between potentials, field strengths and sources can be formulated in the form of compact quaternionic differential equations. The alternative reformulation of equations of gravitoelectromagnetism based on formalism of [Formula: see text] matrices is also discussed. The results reveal the similarity and isomorphism of distinctive algebraic structures.

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Čadež, Andrej. "The role of electromagnetism in tidal disruption events." Proceedings of the International Astronomical Union 12, S324 (September 2016): 107–10. http://dx.doi.org/10.1017/s1743921316013119.

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AbstractTidal disruption events are characterized by the prompt release of very high energy electromagnetic radiation, which rapidly carries away a significant fraction of mass-energy. The time scale od prompt release is quite comparable to the time scale of gravitational collapse. We suggest that generation of very high energy radiation from pulsar nebulae may be an example of the relativistic coupling between gravity and electromagnetism. The main ingredient of our picture comes from the observation that the electron - ion energy exchange time scale is much longer than the electron ion energy exchange time scale, which leads to thermodynamic decoupling of electron and ion gases, and thus to their different temperatures. Under such conditions the dominating hotter component pushes the colder component further out and thus generates a global electric field which constrains electrons and ions by their mutually generated electric field, yet allows them to reach very high kinetic energies

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Gueorguiev, Vesselin G., and Andre Maeder. "Geometric Justification of the Fundamental Interaction Fields for the Classical Long-Range Forces." Symmetry 13, no. 3 (February 26, 2021): 379. http://dx.doi.org/10.3390/sym13030379.

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Based on the principle of reparametrization invariance, the general structure of physically relevant classical matter systems is illuminated within the Lagrangian framework. In a straightforward way, the matter Lagrangian contains background interaction fields, such as a 1-form field analogous to the electromagnetic vector potential and symmetric tensor for gravity. The geometric justification of the interaction field Lagrangians for the electromagnetic and gravitational interactions are emphasized. The generalization to E-dimensional extended objects (p-branes) embedded in a bulk space M is also discussed within the light of some familiar examples. The concept of fictitious accelerations due to un-proper time parametrization is introduced, and its implications are discussed. The framework naturally suggests new classical interaction fields beyond electromagnetism and gravity. The simplest model with such fields is analyzed and its relevance to dark matter and dark energy phenomena on large/cosmological scales is inferred. Unusual pathological behavior in the Newtonian limit is suggested to be a precursor of quantum effects and of inflation-like processes at microscopic scales.

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FEWSTER, CHRISTOPHER J., and DAVID S. HUNT. "QUANTIZATION OF LINEARIZED GRAVITY IN COSMOLOGICAL VACUUM SPACETIMES." Reviews in Mathematical Physics 25, no. 02 (March 2013): 1330003. http://dx.doi.org/10.1142/s0129055x13300033.

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Linearized Einstein gravity (with possibly non-zero cosmological constant) is quantized in the framework of algebraic quantum field theory by analogy with Dimock's treatment of electromagnetism [Rev. Math. Phys.4 (1992) 223–233]. To achieve this, the classical theory is developed in a full, rigorous and systematic fashion, with particular attention given to the circumstances under which the symplectic product is weakly non-degenerate and to the related question of whether the space of solutions is separated by the classical observables on which the quantum theory is modeled.

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Yokoyama, Shuichi. "Study of gauge gravity duality using flow equation." Impact 2020, no. 5 (November 9, 2020): 19–21. http://dx.doi.org/10.21820/23987073.2020.5.19.

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There are four elementary forces of nature that describe every interaction in nature: gravity, electromagnetism, the strong force and the weak force. Of these, gravity is the most commonly known and the one that we are most familiar with, but it is still one of the most difficult to explain. Dr Shuichi Yokoyama, from the Yukawa Institute for Theoretical Physics at Kyoto University in Japan, has spent his career studying quantum gravity. Yokoyama is working with a team of researchers, including Dr Tetsuya Onogi and Dr Sinya Aoki, focusing on tackling the problems surrounding our current understanding of gravity by employing modern techniques of theoretical physics, including quantum information and string theory.

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Journal articles on the topic 'Electromagnetism and gravity'

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