Results 31 to 40 of about 680,116 (340)
Scalar field dark matter and the Higgs field
Physics Letters B, 2016 We discuss the possibility that dark matter corresponds to an oscillating scalar field coupled to the Higgs boson. We argue that the initial field amplitude should generically be of the order of the Hubble parameter during inflation, as a result of its ...
O. Bertolami +2 more
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Global existence and future asymptotic behaviour for solutions of the Einstein-Vlasov-scalar field system with surface symmetry [PDF]
, 2005 We prove in the cases of plane and hyperbolic symmetries a global in time existence result in the future for comological solutions of the Einstein-Vlasov-scalar field system, with the sources generated by a distribution function and a scalar field ...
D Tegankong +5 more
core +1 more source
New Singular and Nonsingular Colliding Wave Solutions in Einstein - Maxwell - Scalar Theory [PDF]
, 2003 A technique is given to generate coupled scalar field solutions in colliding Einstein - Maxwell (EM) waves. By employing the Bell - Szekeres solution as seed and depending on the chosen scalar field it is possible to construct nonsingular solutions.
A. Eris +18 more
core +2 more sources
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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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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Quantum imploding scalar fields [PDF]
Royal Society Open Science, 2018 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.
openaire +4 more sources
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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Reformulating scalar–tensor field theories as scalar–scalar field theories using a novel geometry
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2022 In this paper, I shall show how the notions of Finsler geometry can be used to construct a similar geometry using a scalar field, f , on the cotangent bundle of a differentiable manifold M . This will enable me to use the second vertical derivatives of f , along with ...
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Random scalar fields and hyperuniformity [PDF]
Journal of Applied Physics, 2017 Disordered many-particle hyperuniform systems are exotic amorphous states of matter that lie between crystals and liquids. Hyperuniform systems have attracted recent attention because they are endowed with novel transport and optical properties. Recently, the hyperuniformity concept has been generalized to characterize two-phase media, scalar fields ...
Zheng Ma, Salvatore Torquato
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R2 quantum corrected scalar field inflation
Nuclear Physics B, 2022 String theory enjoys an elevated role among quantum gravity theories, since it seems to be the most consistent UV completion of general relativity and the Standard Model.
V.K. Oikonomou, Ifigeneia Giannakoudi
doaj +1 more source