Results 11 to 20 of about 559,341 (295)
Scalar potential from de Sitter brane in 5D and effective cosmological constant [PDF]
, 2003 We derive the scalar potential in zero mode effective action arising from a de Sitter brane embedded in five dimensions with bulk cosmological constant $\Lambda$.
A. Karch +7 more
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Gravitational positivity bounds on scalar potentials [PDF]
Physical Review D, 2021 We derive constraints on scalar field theories coupled to gravity by using recently developed positivity bounds in the presence of gravity. It is found that a canonically-normalized real scalar cannot have an arbitrarily flat potential unless some new physics enters well below the Planck scale.
Toshifumi Noumi, Junsei Tokuda
openaire +2 more sources
GENERALIZATION OF THE THOMSON FORMULA FOR HOMOGENEOUS HARMONIC FUNCTIONS
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019 It is shown that the Thomson formula for three-dimensional harmonic homogeneous functions can be generalized if, instead of purely algebraic linear expressions, one uses a linear algebraic form with the participation of the first order partial ...
Berdnikov Alexander +3 more
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Quantum corrections to slow-roll inflation: scalar and tensor modes
Journal of High Energy Physics, 2021 Inflation is often described through the dynamics of a scalar field, slow-rolling in a suitable potential. Ultimately, this inflaton must be identified with the expectation value of a quantum field, evolving in a quantum effective potential. The shape of
Jens O. Andersen +2 more
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BASIC DONKIN'S DIFFERENTIAL OPERATORS FOR HOMOGENEOUS HARMONIC FUNCTIONS
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019 It is shown that there are the differential operators that transform three-dimensional homogeneous harmonic functions into new three-dimensional homogeneous harmonic functions.
Berdnikov Alexander +3 more
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Global strain-induced scalar potential in graphene devices
Communications Physics, 2021 The electrical and optical properties of a material depend strongly on the details of its crystal structure. Here, the authors report a technique to mechanically deform the lattice of monolayer graphene with strain, and electrically detect the generation
Lujun Wang +8 more
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GENERALIZATION OF THE THOMSON FORMULA FOR HARMONIC FUNCTIONS OF A GENERAL TYPE
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019 It is shown that the Thomson formula for three-dimensional harmonic functions is unique. Namely, there are no other formulas of this type, with the exception of the trivial change of variables in the form of shifts, reflections, rotations and stretching ...
Berdnikov Alexander +3 more
doaj +1 more source
Physics Letters B, 2020 We consider a universe filled with perfect fluid with the constant equation of state parameter ω. In the theory of scalar perturbations, we study the effect of peculiar velocities on the gravitational potential.
Alvina Burgazli +3 more
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Non-chaotic dynamics in general-relativistic and scalar-tensor cosmology [PDF]
, 2006 In the context of scalar-tensor models of dark energy and inflation, the dynamics of vacuum scalar-tensor cosmology are analysed without specifying the coupling function or the scalar field potential.
Banerjee N +39 more
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Polar Quasinormal Modes of Neutron Stars in Massive Scalar-Tensor Theories
Frontiers in Physics, 2021 We study polar quasinormal modes of relativistic stars in scalar-tensor theories, where we include a massive gravitational scalar field and employ the standard Brans-Dicke coupling function. For the potential of the scalar field we consider a simple mass
Jose Luis Blázquez-Salcedo +4 more
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