25 citations · 222 across the 24 of their papers we have counts for
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Weiss variation for general boundaries
Justin C. Feng, Sumanta Chakraborty
The Weiss variation of the Einstein-Hilbert action with an appropriate boundary term has been studied for general boundary surfaces; the boundary surfaces can be spacelike, timelik…
Self-collision of a portal wormhole
Justin C. Feng, José P. S. Lemos, Richard A. Matzner
We consider the self-collision of portals in classical general relativity. Portals are wormholes supported by a single loop of negative mass cosmic string, and being wormholes, por…
High Order Asymptotic Expansions of a Good-Bad-Ugly Wave Equation
Miguel Duarte, Justin Feng, Edgar Gasperin +1
A heuristic method to find asymptotic solutions to a system of non-linear wave equations near null infinity is proposed. The non-linearities in this model, dubbed good-bad-ugly, ar…