Results 21 to 30 of about 45,707 (265)
Colored scalar in a chromomagnetic field
Open Physics, 2010 Abstract The motion of colored scalar particles in a constant color magnetic field is considered. The Klein-Gordon equation is solved in this background and the energy spectrum is quantized by boundary conditions. The unitary transformation diagonalizing this equation and the states with definite energy are found.
Turkoz Shemsettin +2 more
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European Physical Journal C: Particles and Fields, 2018 With a suitable decomposition of its energy-momentum tensor into pressureless matter and a vacuum type term, we investigate the spherical gravitational collapse of a minimally coupled, self-interacting scalar field, showing that it collapses to a ...
S. Carneiro, J. C. Fabris
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Universe, 2023 We discuss the problem of the quantization and dynamic evolution of a scalar free field in the interior of a Schwarzschild black hole. A unitary approach to the dynamics of the quantized field is proposed: a time-dependent Hamiltonian governing the ...
Pawel Gusin +5 more
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Journal of Mathematical Physics, 1996 Static spherically symmetric uncoupled scalar space–times have no event horizon and a divergent Kretschmann singularity at the origin of the coordinates. The singularity is always present so that nonstatic solutions have been sought to see if the singularities can develop from an initially singular free space–time.
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Analytic solutions in Einstein-aether scalar field cosmology
European Physical Journal C: Particles and Fields, 2020 In the context of Einstein-aether scalar field cosmology we solve the field equations and determine exact and analytic solutions. In particular, we consider a model proposed by Kanno and Soda where the aether and the scalar fields interact through the ...
Andronikos Paliathanasis, Genly Leon
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Nontrivial directions for scalar fields [PDF]
Physical Review D, 1996 UUencoded LaTex, 15 pages + 3 postscript ...
Halpern, Ken, Huang, Kerson
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Shadow Images of a Rotating Dyonic Black Hole with a Global Monopole Surrounded by Perfect Fluid
Universe, 2020 In this paper, we revisit the rotating global monopole metric and extend the metric to a rotating dyonic global monopole in the presence of a perfect fluid. We then show that the surface topology at the event horizon, related to the metric computed, is a
Sumarna Haroon +2 more
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Complex scalar fields in scalar-tensor and scalar-torsion theories
Modern Physics Letters A, 2022 In this paper, we investigate the cosmological dynamics in a spatially flat Friedmann–Lemaître–Robertson–Walker geometry in scalar-tensor and scalar-torsion theories where the nonminimally coupled scalar field is a complex field. We derive the cosmological field equations and we make use of dimensionless variables in order to determine the stationary ...
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Vacuum Radiation from Massive Scalar Field
Universe, 2022 The vacuum radiation of a massive scalar field is studied by means of a single moving mirror. The field equation with an arbitrary-shaped mirror moving in (d+1) dimensions is given perturbatively in the non-relativistic limit.
Yu-Song Cao
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Quantum imploding scalar fields [PDF]
Royal Society Open Science, 2018 Abstract The d’Alembertian □ϕ = 0 has the solution ϕ = f(v)/r, where f is a function of a null coordinate v, and this allows creation of a divergent singularity out of nothing. In scalar-Einstein theory a similar situation arises both for the scalar field and also for curvature invariants such as the Ricci scalar. Here what happens in
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