6 papers
Covariant variation for point-particle Lagrangians
Finnian Gray, Sebastian Murk, Daniel R. Terno
Structureless test particles in general relativity follow geodesics. For extended bodies, higher-order multipole moments lead to departures from geodesic motion; in particular, spi…
Connecting Quantum Tomography and Quantum Retrodiction
Sebastian Murk, Ian Tan, Fabian Müller +1
Quantum tomography and quantum retrodiction are traditionally viewed as separate inference tasks: tomography reconstructs quantum states from measurement data, whereas retrodiction…
Classical-quantum gravity as quantum gravity in disguise
Masahiro Hotta, Sebastian Murk, Daniel R. Terno
Whether gravity must be quantized remains one of the biggest open problems in fundamental physics. Classical-quantum hybrid theories have recently attracted attention as a possible…
Thermodynamics of Regular Black Holes in Anti-de Sitter Space
Robie A. Hennigar, David KubizÅák, Sebastian Murk +1
We construct regular black holes with anti-de Sitter asymptotics in theories incorporating infinite towers of higher-order curvature corrections in any dimension . We find…
Gravity-induced birefringence in spherically symmetric spacetimes
Sebastian Murk, Daniel R. Terno, Rama Vadapalli
Geometric optics effectively describes the propagation of electromagnetic waves when the wavelength is much smaller than the characteristic length scale of the medium, making wave…
Light rings and causality for nonsingular ultracompact objects sourced by nonlinear electrodynamics
Sebastian Murk, Ioannis Soranidis
We study observational signatures of nonsingular ultracompact objects regularized by nonlinear electrodynamics. The phenomenon of birefringence causes photons of different polariza…