192 citations · 1.4k across the 38 of their papers we have counts for
33 papers · 1 filter
Geodesic congruences, impulsive gravitational waves and gravitational memory
Martin O'Loughlin, Hovhannes Demirchian
In this paper we introduce a new approach to the study of the effects that an impulsive wave, containing a mixture of material sources and gravitational waves, has on a geodesic co…
Horizon Shells: Classical Structure at the Horizon of a Black Hole
Matthias Blau, Martin O'Loughlin
We address the question of the uniqueness of the Schwarzschild black hole by considering the following question: How many meaningful solutions of the Einstein equations exist that…
Horizon Shells and BMS-like Soldering Transformations
Matthias Blau, Martin O'Loughlin
We revisit the theory of null shells in general relativity, with a particular emphasis on null shells placed at horizons of black holes. We study in detail the considerable freedom…
Aspects of Plane Wave (Matrix) String Dynamics
Matthias Blau, Martin O'Loughlin, Lorenzo Seri
We analyse two issues that arise in the context of (matrix) string theories in plane wave backgrounds, namely (1) the use of Brinkmann- versus Rosen-variables in the quantum theory…
The non-Abelian gauge theory of matrix big bangs
Martin O'Loughlin, Lorenzo Seri
We study at the classical and quantum mechanical level the time-dependent Yang-Mills theory that one obtains via the generalisation of discrete light-cone quantisation to singular…
DLCQ and Plane Wave Matrix Big Bang Models
Matthias Blau, Martin O'Loughlin
We study the generalisations of the Craps-Sethi-Verlinde matrix big bang model to curved, in particular plane wave, space-times, beginning with a careful discussion of the DLCQ pro…