Results 51 to 60 of about 186,264 (366)

Holographic chiral induced W-gravities [PDF]

, 2014
We study boundary conditions for 3-dimensional higher spin gravity that admit asymptotic symmetry algebras expected of 2-dimensional induced higher spin theories in the light cone gauge.
Poojary, Rohan R., Suryanarayana, Nemani V.   +1 more
core   +2 more sources

Earth-Moon Lagrangian points as a testbed for general relativity and effective field theories of gravity [PDF]

, 2015
We first analyse the restricted four-body problem consisting of the Earth, the Moon and the Sun as the primaries and a spacecraft as the planetoid. This scheme allows us to take into account the solar perturbation in the description of the motion of a ...
E. Battista, S. Dell’Agnello, G. Esposito, L. Fiore, J. Simo, A. Grado   +5 more
semanticscholar   +1 more source

On the viability of f(Q) gravity models [PDF]

Classical and quantum gravity, 2022
In general relativity, the contracted Bianchi identity makes the field equation compatible with the energy conservation, likewise in f(R) theories of gravity.
Avik De, T. Loo
semanticscholar   +1 more source

Mimetic massive gravity: beyond linear approximation

Journal of High Energy Physics, 2018
We present a theory of ghost-free massive gravity where the mass of the graviton is generated through the Brout-Englert-Higgs (BEH) mechanism and one of the four scalar fields used is that of mimetic gravity.
Ali H. Chamseddine, Viatcheslav Mukhanov
doaj   +1 more source

Cosmological Cutting Rules

Journal of High Energy Physics, 2021
Primordial perturbations in our universe are believed to have a quantum origin, and can be described by the wavefunction of the universe (or equivalently, cosmological correlators). It follows that these observables must carry the imprint of the founding
Scott Melville, Enrico Pajer
doaj   +1 more source

Discrete structures in gravity [PDF]

, 2000
Discrete approaches to gravity, both classical and quantum, are reviewed briefly, with emphasis on the method using piecewise-linear spaces. Models of 3-dimensional quantum gravity involving 6j-symbols are then described, and progress in generalising ...
Ambjørn J., Archer F. J., Baez J., Baez J., Barrett J. W., Barrett J. W., Barrett J. W., Barrett J. W., Barrett J. W., Barrett J. W., Barrett J. W., Birmingham D., Birmingham D., Brewin L., Brewin L., Carfora M., Caselle M., Correia da Silva C. L. B., Correia da Silva C. L. B., Franzosi R., Franzosi R., Freidel L., Freidel L., Gott J. R., Hamber H. W., Hamber H. W., Hartle J. B., Hasslacher B., Hollmann H. R., Immirzi G., Ionicioiu R., Ionicioiu R., Iwasaki J., Kauffman L. H., Mannion C. L., Markopoulou F., Markopoulou F., Menotti P., Ooguri H., Reisenberger M., Reisenberger M., Reisenberger M., Riedler J., Roberts J. D., Roček M., Ruth M. Williams, Schleich K., Schleich K., Tullio Regge, Turaev V. G., Waelbroeck H., Welling M., Williams R. M., ’t Hooft G., ’t Hooft G.   +54 more
core   +2 more sources

Massive spin-2 scattering and asymptotic superluminality

Journal of High Energy Physics, 2018
We place model-independent constraints on theories of massive spin-2 particles by considering the positivity of the phase shift in eikonal scattering. The phase shift is an asymptotic S-matrix observable, related to the time delay/advance experienced by ...
Kurt Hinterbichler, Austin Joyce, Rachel A. Rosen   +2 more
doaj   +1 more source

Causality bounds on scalar-tensor EFTs

Journal of High Energy Physics, 2023
We compute the causality/positivity bounds on the Wilson coefficients of scalar-tensor effective field theories. Two-sided bounds are obtained by extracting IR information from UV physics via dispersion relations of scattering amplitudes, making use of ...
Dong-Yu Hong, Zhuo-Hui Wang, Shuang-Yong Zhou   +2 more
doaj   +1 more source

Towards understanding the ultraviolet behavior of quantum loops in infinite-derivative theories of gravity [PDF]

, 2014
In this paper we will consider quantum aspects of a non-local, infinite-derivative scalar field theory—a toy model depiction of a covariant infinite-derivative, non-local extension of Einstein’s general relativity which has previously been shown to be ...
Spyridon Talaganis, Tirthabir Biswas, A. Mazumdar   +2 more
semanticscholar   +1 more source

Dimensionful deformations of Poincare' symmetries for a Quantum Gravity without ideal observers [PDF]

, 1998
Quantum Mechanics is revisited as the appropriate theoretical framework for the description of the outcome of experiments that rely on the use of classical devices.
Bohr N., GIOVANNI AMELINO-CAMELIA, Ng Y. J.   +2 more
core   +2 more sources