Results 61 to 70 of about 50,464 (300)
Graviton scattering amplitudes in M theory [PDF]
, 1997 We compute graviton scattering amplitudes in M theory using Feynman rules for a scalar particle coupled to gravity in eleven dimensions. The processes that we consider describe the single graviton exchange and the double graviton exchange, that in M ...
Becker, Katrin, Becker, Melanie
core +2 more sources
High-frequency graviton from inflaton oscillation [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 We point out that there is a high-frequency tail of the stochastic inflationary gravitational wave background that scales as f−1/2 with frequency f.
Yohei Ema, Ryusuke Jinno, K. Nakayama
semanticscholar +1 more source
Physical Review D, 2018 We find vacuum solutions such that massive gravitons are confined in a local spacetime region by their gravitational energy in asymptotically flat spacetimes in the context of the bigravity theory. We call such self-gravitating objects massive graviton geons.
Aoki, Katsuki +3 more
openaire +2 more sources
AdS graviton stars and differential configurational entropy
Physics Letters B, 2021 AdS graviton stars are studied in the differential configurational entropy setup, as solutions of the effective Einstein field equations that backreact to compactification.
Roldao da Rocha
doaj +1 more source
A nearly massless graviton in Einstein-Gauss-Bonnet inflation with linear coupling implies constant-roll for the scalar field [PDF]
Europhysics letters, 2020 The striking GW170817 event indicated that the graviton is nearly massless, since the gamma rays emitted from the two neutron stars merging arrived almost simultaneously with the gravitational waves.
V. Oikonomou, F. Fronimos
semanticscholar +1 more source
Can Gravitons be Detected? [PDF]
Foundations of Physics, 2006 Freeman Dyson has questioned whether any conceivable experiment in the real universe can detect a single graviton. If not, is it meaningful to talk about gravitons as physical entities? We attempt to answer Dyson's question and find it is possible concoct an idealized thought experiment capable of detecting one graviton; however, when anything remotely
Boughn, Stephen P., Rothman, Tony
openaire +3 more sources
Two-Loop Four-Graviton Scattering Amplitudes. [PDF]
Physical Review Letters, 2020 We present the analytic form of the two-loop four-graviton scattering amplitudes in Einstein gravity. To remove ultraviolet divergences we include counterterms quadratic and cubic in the Riemann curvature tensor. The two-loop numerical unitarity approach
S. Abreu +6 more
semanticscholar +1 more source
Topological defects formation with momentum dissipation
Journal of High Energy Physics, 2021 We employ holographic techniques to explore the effects of momentum dissipation on the formation of topological defects during the critical dynamics of a strongly coupled superconductor after a linear quench of temperature.
Zhi-Hong Li, Hua-Bi Zeng, Hai-Qing Zhang
doaj +1 more source
Soft graviton exchange and the information paradox [PDF]
Physical Review D, 2020 We show that there is a remarkable soft limit in quantum gravity where the information paradox is readily resolved due to virtual soft graviton exchange on the black hole horizon. This regime is where collision energies satisfy $\sqrt{s}\gg \gamma M_{Pl}$
Nava Gaddam, N. Groenenboom
semanticscholar +1 more source
, 2022 The article discusses the possibility of detecting of gravitons using recently created devices with cold atoms at picokelvin temperatures.
openaire +2 more sources