Results 21 to 30 of about 157,557 (265)
Journal of High Energy Physics, 2021 We study the SL(2) transformation properties of spherically symmetric perturbations of the Bertotti-Robinson universe and identify an invariant μ that characterizes the backreaction of these linear solutions.
Shahar Hadar +2 more
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Celestial operator product expansions and w1+∞ symmetry for all spins
Journal of High Energy Physics, 2022 The operator product expansion of massless celestial primary operators of arbitrary spin is investigated. Poincaré symmetry is found to imply a set of recursion relations on the operator product expansion coefficients of the leading singular terms at ...
E. Himwich, M. Pate, K. Singh
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A note on the subleading soft graviton
Journal of High Energy Physics, 2021 We show that the soft part of the charge generating infinitesimal superrotations can be expressed, in harmonic gauge, in terms of metric components evaluated at the boundaries of null infinity that are subleading in a large radius expansion.
Elizabeth Himwich +2 more
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Conformally soft photons and gravitons
Journal of High Energy Physics, 2019 The four-dimensional S-matrix is reconsidered as a correlator on the celestial sphere at null infinity. Asymptotic particle states can be characterized by the point at which they enter or exit the celestial sphere as well as their SL(2, ℂ) Lorentz ...
Laura Donnay +2 more
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An effective matrix model for dynamical end of the world branes in Jackiw-Teitelboim gravity
Journal of High Energy Physics, 2022 We study Jackiw-Teitelboim gravity with dynamical end of the world branes in asymptotically nearly AdS2 spacetimes. We quantize this theory in Lorentz signature, and compute the Euclidean path integral summing over topologies including dynamical branes ...
Ping Gao +2 more
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Gravitational memory in higher dimensions
Journal of High Energy Physics, 2018 It is shown that there is a universal gravitational memory effect measurable by inertial detectors in even spacetime dimensions d ≥ 4. The effect falls off at large radius r as r 3−d .
Monica Pate +2 more
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The rule of law and the law of nature
Filosofický časopis, 2021 Traditionally, the understanding of the Greek notion of νόμος, especially concerning the notion as it was conceived in Athens, has been hindered by a tendency to project modern interpretations of the law onto the ancient mentality and praxis. The first confusion comes from the exclusive identification of νόμος with the modern concept of law, which ...
openaire +2 more sources
Celestial amplitudes from UV to IR
Journal of High Energy Physics, 2021 Celestial amplitudes represent 4D scattering of particles in boost, rather than the usual energy-momentum, eigenstates and hence are sensitive to both UV and IR physics.
N. Arkani-Hamed +3 more
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Aspects of AdS2 quantum gravity and the Karch-Randall braneworld
Journal of High Energy Physics, 2022 In this paper, we use the Karch-Randall braneworld to study theories of quantum gravity in two dimensional (nearly) anti-de Sitter space (AdS2). We focus on effective gravitational theories in the setup with two Karch-Randall branes embedded in an ...
Hao Geng
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A d-dimensional stress tensor for Minkd+2 gravity
Journal of High Energy Physics, 2018 We consider the tree-level scattering of massless particles in (d+2)-dimensional asymptotically flat spacetimes. The S $$ \mathcal{S} $$-matrix elements are recast as correlation functions of local operators living on a space-like cut ℳ d of the null ...
Daniel Kapec, Prahar Mitra
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