Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Potting, Robertus"'
Publikováno v:
Universe 2024, 10(7), 271
In this work, we discuss the de Sitter swampland conjectures in the context of the generalized Chaplygin-inspired inflationary model. We demonstrate that these conjectures can be satisfied, but only in the region of the parameter space far away from
Externí odkaz:
http://arxiv.org/abs/2402.19051
Autor:
Potting, Robertus
In this work we investigate possible actions for antisymmetric two-tensor field models subject to constraints that force the field to acquire a nonzero vacuum expectation value, thereby spontaneously breaking Lorentz invariance. In order to assure st
Externí odkaz:
http://arxiv.org/abs/2311.03159
Autor:
Potting, Robertus
We consider Lorentz-symmetry properties of the ghost-free massive gravity theory proposed by de Rham, Gabadadze, and Tolley. In particular, we present potentially observable effects in gravitational-wave propagation and in Newton's law, including Lor
Externí odkaz:
http://arxiv.org/abs/2301.13180
Autor:
Potting, Robertus
In this work we adapt the foundations of relativistic kinetic theory and the Boltzmann equation to particles with Lorentz-violating dispersion relations. The latter are taken to be those associated to two commonly considered sets of coefficients in t
Externí odkaz:
http://arxiv.org/abs/2212.06528
Autor:
Potting, Robertus, Sá, Paulo M.
We investigate a cosmological model in which dark energy, represented by a quintessential scalar field, is directly coupled to a dark-matter perfect fluid. We are interested in solutions of cosmological relevance, namely those for which a dark-matter
Externí odkaz:
http://arxiv.org/abs/2112.07608
Autor:
Kostelecky, Alan, Potting, Robertus
The role of Lorentz symmetry in ghost-free massive gravity is studied, emphasizing features emerging in approximately Minkowski spacetime. The static extrema and saddle points of the potential are determined and their Lorentz properties identified. S
Externí odkaz:
http://arxiv.org/abs/2108.04213
Publikováno v:
Ann. Phys. (NY) 422, 168303 (2020)
We study standing-wave solutions of Born-Infeld electrodynamics, with nonzero electromagnetic field in a region between two parallel conducting plates. We consider the simplest case which occurs when the vector potential describing the electromagneti
Externí odkaz:
http://arxiv.org/abs/2006.09053
Akademický článek
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Publikováno v:
Phys. Rev. D 93, 125007 (2016)
The source of CPT-violation in the photon sector of the Standard Model Extension arises from a Chern-Simons-like contribution that involves a coupling to a fixed background vector field $k_{AF}^\mu$. These Lorentz- and CPT-violating photons have well
Externí odkaz:
http://arxiv.org/abs/1603.00308
Radiative corrections in quantum field theories with small departures from Lorentz symmetry alter structural aspects of the theory, in particular the definition of asymptotic single-particle states. Specifically, the mass-shell condition, the standar
Externí odkaz:
http://arxiv.org/abs/1410.1345