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Creating oscillons and oscillating kinks in two scalar field theories
(2019-10-01)
Oscillons are time-dependent, localized in space, extremely long-lived states in nonlinear scalar-field models, while kinks are topological solitons in one spatial dimension. In the present work, we show new classes of ...
Inflation with Sterile Scalar Coupled to Massive Fermions and to Gravity
(Springer, 2022-09-01)
In a recent paper by V. Barra et al. [3] it was shown that the consistency of the quantum theory of a sterile scalar coupled to massive fermions requires inclusion of odd-power terms in the potential of scalar self-interaction. ...
Global monopole in scalar-tensor theories of gravity
(Brasil, 2001)
The gravitational field of a global monopole in the context of scalar-tensor theories of gravity is investigated. The spacetime is determined by solving the equation for the scalar field and using the global monopole ...
Fully resonant scalars on asymptotically AdS wormholes.
In this work, we show the existence of asymptotically anti-de Sitter (AdS) wormhole geometries in which the scalar probe has an equispaced, fully resonant spectrum, as that of a scalar on AdS spacetime, and explore its ...
Fully resonant scalars on asymptotically AdS wormholes.
In this work, we show the existence of asymptotically anti-de Sitter (AdS) wormhole geometries in which the scalar probe has an equispaced, fully resonant spectrum, as that of a scalar on AdS spacetime, and explore its ...
Fully resonant scalars on asymptotically AdS wormholes
(2019)
In this work, we show the existence of asymptotically anti-de Sitter (AdS) wormhole geometries in which the scalar probe has an equispaced, fully resonant spectrum, as that of a scalar on AdS spacetime, and explore its ...
Quantization of unstable linear scalar fields in static spacetimes
(2013-12-02)
We discuss the quantization of an unstable field through the construction of a one-particle Hilbert space. The system considered here is a neutral scalar field evolving over a globally hyperbolic static spacetime and subject ...
Quasiclassical approximation for ultralocal scalar fields
(1986-12-01)
The author shows how to obtain the quasiclassical evolution of a class of field theories called ultralocal fields. Coherent states that follow the 'classical' orbit as defined by Klauder's weak correspondence principle and ...
Modeling dark matter halos with nonlinear field theories
(2021-05-15)
In the present work, we adopt a nonlinear scalar field theory coupled to the gravity sector to model galactic dark matter. We find analytical solutions for the scalar field considering the weak field gravity limit, which ...
Modeling dark matter halos with nonlinear field theories
(Amer Physical Soc, 2021-05-14)
In the present work, we adopt a nonlinear scalar field theory coupled to the gravity sector to model galactic dark matter. We find analytical solutions for the scalar field considering the weak field gravity limit, which ...