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Nathan Moynihan

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Articles by Nathan Moynihan

[1905.08213] Scattering Amplitudes, Black Holes and Leading Singularities in Cubic Theories of Gravity

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By Nathan Moynihan
| arXiv
Authors:William T Emond, Nathan Moynihan (Submitted on 20 May 2019) Abstract: We compute the semi-classical potential arising from a generic theory of cubic gravity, a higher derivative theory of spin-2 particles, in the framework of modern amplitude techniques. We show that there are several interesting aspects of the potential, including some non-dispersive terms that lead to black hole solutions (include quantum corrections) that agree with those derived in Einsteinian cubic gravity (ECG).
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[1802.09499] Towards the Raychaudhuri Equation Beyond General Relativity

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By Saurya Das, S. Shajidul, S. Shajidul Haque, Nathan Moynihan
| arXiv
Abstract: In General Relativity, gravity is universally attractive, a feature embodied by the Raychaudhuri equation which requires that the expansion of a congruence of geodesics is always non-increasing, as long as matter obeys the strong or weak energy conditions.
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