5 papers
Photon localization: a comparative study
Laura M. Ferguson, Ricardo Rojas Castellano, Kayla Oltman +2
We compare different measures for photon localization in terms of two-dimensional Gaussian wave packets. We find that all measures start to coalesce if the wave packet has evolved…
Consistency Conditions and the Derivation of Harmonic Structure in Einstein-Maxwell-dilaton Theory
Bardia H. Fahim, Joshua G. Fenwick
Many exact solutions of Einstein-Maxwell and Einstein-Maxwell-dilaton theory share a common structural pattern in which the metric functions are built from harmonic functions on a…
New Lorentzian Taub-NUT and Euclidean Eguchi-Hanson Solutions in gravity
J. G. Fenwick, A. M. Ghezelbash
A New Taub-NUT black hole in multiple coordinate systems is solved and analyzed. This black-hole is found to be an extension of the Clifton-Barrow metric for the specific case that…
Antisymmetric tensor portals to dark matter
Alexander J. Magnus, Joshua G. Fenwick, Rainer Dick
Both freeze-in of very weakly coupled dark matter and freeze-out of initially thermalized dark matter from the primordial heat bath provide interesting possibilities for dark matte…
Exact Analytical Taub-NUT like Solution in f(T) Gravity
Joshua G. Fenwick, Masoud Ghezelbash
We construct exact analytical Taub-NUT solutions in the context of gravity. We study the physical properties of the solutions, and compare them with those of the Taub-NUT so…