54 citations · 362 across the 47 of their papers we have counts for
49 papers
The stress-energy distributional multipole for both uncharged and charged dust
Jonathan Gratus, Spyridon Talaganis, Willow Sparks
In this paper, we formulate the distributional uncharged and charged stress-energy tensors. These are integrals, along a worldline, of derivatives of the delta-function. These dist…
Electromagnetic Boundary Conditions for Space--time Interfaces
Jonathan Gratus, Simon A. R. Horsley, Martin W. McCall
We give a general family of electromagnetic boundary conditions applicable to arbitrary space--time interfaces between electromagnetic media, which include the known space--only an…
The Vlasov Bivector: A Parameter-Free Approach to Vlasov Kinematics
Finlay Gunneberg, Jonathan Gratus, Harvey Stanfield
Plasma kinetics, for both flat and curved spacetime, is conventionally performed on the mass shell, a 7--dimensional time-phase space with a Vlasov vector field, also known as the…
Broadband Terahertz Generation in a Corrugated Waveguide with matched Phase and Group Velocities
Sergey S. Siaber, Jonathan Gratus, Rebecca Seviour +2
\begin{abstract} We show that it is possible to design corrugated waveguides where phase and group velocities coincide at an inflection point of the dispersion relation, allowing a…
Moment tracking and their coordinate transformations for macroparticles with an application to plasmas around black holes
Alexander Warwick, Jonathan Gratus
Particle-in-cell codes usually represent large groups of particles as a single macroparticle. These codes are computationally efficient but lose information about the internal stru…
The tensorial representation of the distributional stress-energy quadrupole and its dynamics
Jonathan Gratus, Spyridon Talaganis
We investigate stress-energy tensors constructed from the covariant derivatives of delta functions on a worldline. Since covariant derivatives are used all the components transform…