36 citations · 88 across the 12 of their papers we have counts for
14 papers
Time-varying media, relativity, and the arrow of time
Matias Koivurova, Charles W. Robson, Marco Ornigotti
We study the implications of time-varying wave mechanics, and show how the standard wave equation is modified if the speed of a wave is not constant in time. In particular, waves w…
Rewinding the Void: How One Solution of Einstein's Field Equations Describes Both the Birth of a Universe and the End of Time
Charles W. Robson, Marco Ornigotti
The type D Kasner vacuum solution of general relativity is reviewed, highlighting the little-known, intriguing property that it can describe both an anisotropic cosmology and the s…
Take the A-Metric: Interpretations of Some Known Solutions of Einstein's Vacuum Field Equations
Charles W. Robson, Marco Ornigotti
In this work, we present a new interpretation of the only static vacuum solution of Einstein's field equations with planar symmetry, the Taub solution. This solution is a member of…
Path Integrals: From Quantum Mechanics to Photonics
Charles W. Robson, Yaraslau Tamashevich, Tapio T. Rantala +1
The path integral formulation of quantum mechanics, i.e., the idea that the evolution of a quantum system is determined as a sum over all the possible trajectories that would take…
Reduction of nonlinear field theory equations to envelope models: towards a universal understanding of analogues of relativistic systems
Charles W. Robson, Fabio Biancalana
We investigate a novel mapping between solutions to several members of the Klein-Gordon family of equations and solutions to equations describing their reductions via the slowly va…
Localized waves carrying orbital angular momentum in optical fibers
Paula Nuño Ruano, Charles W. Robson, Marco Ornigotti
We consider the effect of orbital angular momentum (OAM) on localized waves in optical fibers using theory and numerical simulations, focusing on splash pulses and focus wave modes…