11 citations · 26 across the 13 of their papers we have counts for
13 papers
Black holes with torsion hair in cubic Holst-type Poincaré gauge gravity: from singular to regular geometries
Sebastian Bahamonde, Jorge Gigante Valcarcel, Matteo Magi
Motivated by the singularity theorems of Poincaré Gauge (PG) theory, we investigate extensions of the Holst quadratic model by introducing cubic order invariants constructed from t…
Regular black holes from dynamical-tension string hedgehogs
Sebastian Bahamonde, Eduardo I. Guendelman
A spherical cloud of radial strings with non-zero constant tension has an energy density proportional to and therefore produces a singular conical geometry rather than an…
Gauge-invariant cosmological perturbations in Type 3 New General Relativity and background-hierarchy bounds
Kyosuke Tomonari, Daniel Blixt, Sebastian Bahamonde
In this paper, we investigate background-hierarchy bounds in Type~3 of New General Relativity (NGR). These bounds arise when the contribution associated with the evolution of the b…
Geometrically Regular Black Holes with Hedgehog Scalar Hair
Sebastian Bahamonde
We study a simple theory based on general relativity, minimally coupled to a constrained scalar triplet and to an auxiliary non-propagating three-form sector. Within a spherically…
Gravitational waves in Cubic Metric-Affine Gravity
Sebastian Bahamonde, Jorge Gigante Valcarcel, José M. M. Senovilla
We derive new exact gravitational wave solutions with dynamical torsion and nonmetricity tensors in the framework of cubic Metric-Affine Gravity (MAG). For this purpose, we conside…
A gravitational spin-orbit interaction in Poincaré gauge theory
Sebastian Bahamonde, Jorge Gigante Valcarcel
We show a gravitational spin-orbit interaction that can potentially modify the space-time geometry naturally emerges in the framework of Poincaré gauge theory. For this purpose, we…
Coupling Electromagnetism to Torsion: Black Holes and Spin-Charge Interactions
Sebastian Bahamonde, Jorge Maggiolo, Christian Pfeifer
The coupling between matter fields and gravity, encoded in the geometry of spacetime, can be realized in various ways. Most commonly, a minimal coupling principle is employed, mean…
Cosmology of Cubic Poincaré Gauge gravity
Sebastian Bahamonde, Rebecca Briffa, Konstantinos Dialektopoulos +2
In this paper, we study flat FLRW cosmology for a Poincaré gauge theory containing cubic invariants that is free from ghosts in arbitrary backgrounds in the axial and vector sector…
Stability in Cubic Metric-Affine Gravity
Sebastian Bahamonde, Jorge Gigante Valcarcel
We analyse the stability issue of the vector and axial modes of the torsion and nonmetricity tensors around general backgrounds in the framework of cubic Metric-Affine Gravity. We…
Trace Anomaly in Metric-Affine gravity
Sebastian Bahamonde, Yuichi Miyashita, Masahide Yamaguchi
We explore the trace (Weyl) anomaly within a general metric-affine geometry that includes both torsion and nonmetricity. Using the Heat Kernel method and Seeley's algorithm, we com…
Algebraic classification of the gravitational field in general metric-affine geometries
Sebastian Bahamonde, Jorge Gigante Valcarcel, José M. M. Senovilla
We present the algebraic classification of the gravitational field in four-dimensional general metric-affine geometries, thus extending the current results of the literature in the…
Revisiting Stability in New General Relativity
Sebastian Bahamonde, Daniel Blixt, Konstantinos F. Dialektopoulos +1
We study the degrees of freedom in New General Relativity -- flat and metric compatible family of theories -- around the Minkowski background in a gauge invariant manner. First, we…
Stability of Poincaré gauge theory with cubic order invariants
Sebastian Bahamonde, Jorge Gigante Valcarcel
We analyse the stability of the vector and axial sectors of Poincaré gauge theory around general backgrounds in the presence of cubic order invariants defined from the curvature an…