Results 11 to 20 of about 235,883 (239)

Higher order gravities and the Strong Equivalence Principle

Journal of High Energy Physics, 2017
We show that, in all metric theories of gravity with a general covariant action, gravity couples to the gravitational energy-momentum tensor in the same way it couples to the matter energy-momentum tensor order by order in the weak field approximation ...
Tomás Ortín
doaj   +1 more source

A Wilsonian energy-momentum tensor

European Physical Journal C: Particles and Fields, 2018
For local conformal field theories, it is shown how to construct an expression for the energy-momentum tensor in terms of a Wilsonian effective Lagrangian.
Oliver J. Rosten
doaj   +1 more source

Energy-Momentum Tensor Form Factors in QED

SciPost Physics Proceedings, 2022
We present the results for the Energy-Momentum Tensor (EMT) form factor D(t) at oneloop accuracy in quantum electrodynamics for an electron state. We report the the results in the case of both zero and nonzero photon mass.
Simone Rodini, Andreas Metz, Barbara Pasquini
doaj   +1 more source

Relativistic MOND from Modified Energetics [PDF]

, 2014
We begin to investigate the question of what modifications in energy-momentum tensor can yield correct MOND regime. As a starting study, we refrain from insisting on an action principle and focus exclusively on the equations of motion.
Demir, Durmus Ali, Karahan, Canan Nurhan
core   +3 more sources

The energy–momentum tensor(s) in classical gauge theories

Nuclear Physics B, 2016
We give an introduction to, and review of, the energy–momentum tensors in classical gauge field theories in Minkowski space, and to some extent also in curved space–time.
Daniel N. Blaschke, François Gieres, Méril Reboud, Manfred Schweda   +3 more
doaj   +1 more source

To Conserve, or Not to Conserve: A Review of Nonconservative Theories of Gravity

Universe, 2021
Apart from the familiar structure firmly-rooted in the general relativistic field equations where the energy–momentum tensor has a null divergence i.e., it conserves, there exists a considerable number of extended theories of gravity allowing departures ...
Hermano Velten, Thiago R. P. Caramês
doaj   +1 more source

On the Energy-Momentum Tensor of the Scalar Field in Scalar--Tensor Theories of Gravity [PDF]

, 1999
We study the dynamical description of gravity, the appropriate definition of the scalar field energy-momentum tensor, and the interrelation between them in scalar-tensor theories of gravity.
Alexander S. Silbergleit, C. W. Misner, David I. Santiago, G. Magnano, K. Nordtvedt, M. B. Green, M. Fierz, P. G. Bergmann, P. Jordan, R. V. Wagoner, T. Damour, T. Damour   +11 more
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The light-front gauge-invariant energy-momentum tensor [PDF]

, 2015
We provide for the first time a complete parametrization for the matrix elements of the generic asymmetric, non-local and gauge-invariant canonical energy-momentum tensor, generalizing therefore former works on the symmetric, local and gauge-invariant ...
Lorcé, Cédric
core   +1 more source

Momentum of an electromagnetic wave in dielectric media [PDF]

, 2007
Almost a hundred years ago, two different expressions were proposed for the energy--momentum tensor of an electromagnetic wave in a dielectric. Minkowski's tensor predicted an increase in the linear momentum of the wave on entering a dielectric medium ...
Antoci, S., Antoci, S., Antoci, S., Brevik, I., Brevik, I., Cole, K. D., Cole, K. D., de Groot, S. R., de Groot, S. R., de Groot, S. R., de Groot, S. R., de Groot, S. R., de Groot, S. R., de Groot, S. R., de Groot, S. R., Dällenbach, W., Einstein, A., Fano, R. M., Ginzburg, V. L., Gordon, W., Halina Rubinsztein-Dunlop, Hensley, J. M., Israel, W., Jackson, J. D., James, R. P., Kranyš, M., Kranyš, M., Lai, H. M., Lett, P., Livens, G. H., Marx, G., Maugin, G. A., Minkowski, H., Møller, C., Møller, C., Norman R. Heckenberg, Padgett, M., Pauli, W., Pauli, W., Peierls, R., Penfield, P., Jr., Robert N. C. Pfeifer, Robinson, F. N. H., Skobel’tsyn, D. V., Stallinga, S., Stallinga, S., Tamm, I., Timo A. Nieminen, Tolman, R. C., Walker, G. B., Walker, G. B.   +50 more
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From Heisenberg–Euler Lagrangian to the discovery of Chromomagnetic Gluon Condensation

European Physical Journal C: Particles and Fields, 2020
I reexamine the phenomena of the chromomagnetic gluon condensation in Yang–Mills theory. The extension of the Heisenberg–Euler Lagrangian to the Yang–Mills theory allows to calculate the effective action, the energy-momentum tensor and demonstrate that ...
George Savvidy
doaj   +1 more source