Results 1 to 10 of about 684,438 (336)
Static and slowly rotating neutron stars in scalar–tensor theory with self-interacting massive scalar field [PDF]
European Physical Journal C: Particles and Fields, 2018 Binary pulsar observations and gravitational wave detections seriously constrained scalar–tensor theories with massless scalar field allowing only small deviations from general relativity.
Kalin V. Staykov +3 more
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Scalar Perturbations in Scalar Field Quantum Cosmology [PDF]
Physical Review D, 2009 In this paper it is shown how to obtain the simplest equations for the Mukhanov-Sasaki variables describing quantum linear scalar perturbations in the case of scalar fields without potential term.
B. Hatfield +4 more
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Rotating Scalar Field Wormhole [PDF]
Classical and Quantum Gravity, 2006 We derive an exact solution to the Einstein's equations with a stress-energy tensor corresponding to an opposite-sign scalar field, and show that such a solution describes the internal region of a rotating wormhole.
Matos, Tonatiuh, Nunez, Dario
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Scalar Field Inhomogeneous Cosmologies [PDF]
Journal of Mathematical Physics, 1995 Some exact solutions for the Einstein field equations corresponding to inhomogeneous $G_2$ cosmologies with an exponential-potential scalar field which generalize solutions obtained previously are considered.
Feinstein, A., Ibáñez, J., Labraga, P.
core +4 more sources
Massless and massive scalar shell dynamics from rotating BTZ black holes with nonminimally coupled scalar fields [PDF]
Scientific ReportsThis paper is devoted to presenting the dynamics of thin-shell composed of massive and massless scalar fields developed from (2+1)-dimensional rotating black holes with nonminimally coupled scalar fields.
Faisal Javed +6 more
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Dynamics in Interacting Scalar-Torsion Cosmology
Universe, 2021 In a spatially flat Friedmann–Lemaître–Robertson–Walker background space, we consider a scalar-torsion gravitational model which has similar properties to the dilaton theory. This teleparallel model is invariant under a discrete transformation similar to
Andronikos Paliathanasis
doaj +1 more source
Hyperbolic inflationary model with nonzero curvature
Physics Letters B, 2022 We consider a cosmological model consisting of two scalar fields defined in the hyperbolic plane known as hyperbolic inflation. For the background space, we consider a homogeneous and isotropic spacetime with nonzero curvature.
Andronikos Paliathanasis, Genly Leon
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Generic Three-Parameter Wormhole Solution in Einstein-Scalar Field Theory
Particles, 2021 An exact analytical, spherically symmetric, three-parametric wormhole solution has been found in the Einstein-scalar field theory, which covers the several well-known wormhole solutions.
Bobur Turimov +3 more
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Duality family of scalar field
Nuclear Physics B, 2021 We show that there exists a duality family of self-interacting massive scalar fields. The scalar fields in a duality family are related by a duality transformation.
Wen-Du Li, Wu-Sheng Dai
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Painlevé Analysis of the Cosmological Field Equations in Weyl Integrable Spacetime
Universe, 2022 We apply a singularity analysis to investigate the integrability properties of the gravitational field equations in Weyl Integrable Spacetime for a spatially flat Friedmann–Lemaître–Robertson–Walker background spacetime induced by an ideal gas.
Andronikos Paliathanasis
doaj +1 more source