3 papers
gr-qc2025
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…
physics.optics2025
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…
math-ph2025
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…