79 citations · 390 across the 33 of their papers we have counts for
8 papers · 1 filter
Closed and broken electromagnetic orbits in Kerr--Newman spacetime
Erasmo Caponio, Giulio Sanzeni, Stefan Suhr
We study future-pointing timelike solutions of the Lorentz force equation in the sub-extremal Kerr--Newman spacetime, with special attention to the time-machine region $\mathfrak T…
On the formulations of the Fermat principle in general relativity and beyond
Erasmo Caponio, Miguel Angel Javaloyes
This paper presents a survey of the Fermat principle within the framework of general relativity, tracing its evolution from classical optics to its modern variational formulation i…
A unified framework for photon and massive particle hypersurfaces in stationary spacetimes
Erasmo Caponio, Anna Valeria Germinario, Anna valeria Germinario +1
Massive particle surfaces (MPS), introduced by Kobialko, Bogush and Gal'tsov, are timelike hypersurfaces confining the trajectories of charged massive particles with fixed Killing…
Static spacetimes with a Finsler angular sector
Erasmo Caponio
We consider static spacetimes in spherical coordinates whose angular sector is described by a Finsler metric rather than the standard round metric on . Our first contribution…
Lorentzian-Euclidean black holes and Lorentzian to Riemannian metric transitions
Rossella Bartolo, Erasmo Caponio, Anna Valeria Germinario +1
In recent papers on spacetimes with a signature-changing metric, the concept of a Lorentzian-Euclidean black hole and new elements for Lorentzian-Riemannian signature change have b…
A note on the Sagnac effect in general relativity as a Finslerian effect
Erasmo Caponio, Antonio Masiello
The geometry of the Sagnac effect in a stationary region of a spacetime is reviewed with the aim of emphasizing the role of asymmetry of a Finsler metric defined on a spacelike hyp…