Results 51 to 60 of about 6,479 (312)
Null infinity as an open Hamiltonian system
Journal of High Energy Physics, 2021 When a system emits gravitational radiation, the Bondi mass decreases. If the Bondi energy is Hamiltonian, it can thus only be a time-dependent Hamiltonian. In this paper, we show that the Bondi energy can be understood as a time-dependent Hamiltonian on
Wolfgang Wieland
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An Ultralocal Classical and Quantum Gravity Theory
Journal of High Energy Physics, Gravitation and Cosmology, 2020 8 pages; an ultralocal gravity is quantized proving that full gravity can be affine quantized: a minor equation or two errors ...
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Large Quantum Gravity Effects: Unforeseen Limitations of the Classical Theory [PDF]
Physical Review Letters, 1996 3-dimensional gravity coupled to Maxwell (or Klein-Gordon) fields is exactly soluble under the assumption of axi-symmetry. The solution is used to probe several quantum gravity issues. In particular, it is shown that the quantum fluctuations in the geometry are large unless the number and frequency of photons satisfy the inequality $\N(\hbar Gω)^2 <&
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Mimetic massive gravity: beyond linear approximation
Journal of High Energy Physics, 2018 We present a theory of ghost-free massive gravity where the mass of the graviton is generated through the Brout-Englert-Higgs (BEH) mechanism and one of the four scalar fields used is that of mimetic gravity.
Ali H. Chamseddine, Viatcheslav Mukhanov
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Corners of gravity: the case of gravity as a constrained BF theory
Journal of High Energy Physics, 2021 Following recent works on corner charges we investigate the boundary structure in the case of the theory of gravity formulated as a constrained BF theory.
Remigiusz Durka, Jerzy Kowalski-Glikman
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Singularity-free classical theory of gravity
Physical Review DWe present a classical theory of gravity, which is singularity free at short distances and reduces to General Relativity at large distances. We discuss its implications.
Saurya Das, Mitja Fridman, Sourav Sur
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Massive spin-2 scattering and asymptotic superluminality
Journal of High Energy Physics, 2018 We place model-independent constraints on theories of massive spin-2 particles by considering the positivity of the phase shift in eikonal scattering. The phase shift is an asymptotic S-matrix observable, related to the time delay/advance experienced by ...
Kurt Hinterbichler +2 more
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Quantum gravity fluctuations in the timelike Raychaudhuri equation
Journal of High Energy Physics, 2023 We consider a timelike geodesic congruence in the presence of perturbative quantum fluctuations of the spacetime metric. We calculate the change in the volume of a bundle of geodesics due to such fluctuations and thereby obtain a quantum-gravitationally ...
Sang-Eon Bak +3 more
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Integrability of classical strings dual for noncommutative gauge theories
, 2014 We derive the gravity duals of noncommutative gauge theories from the Yang-Baxter sigma model description of the AdS5 × S5 superstring with classical r-matrices.
Kentaroh Yoshida +5 more
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From classical theory to spin 2 gravity
Intellectual Archive, 2021 We consider here the simple derivation of the Einstein equations by Fock. Then, we approach the way from the spin 1 fields to the spin 2 fields for massive and massless particles and we derive the gravity equations from this base. In conclusion, we discuss the principle of equivalence in classical Einstein theory and in the Schwinger spin 2 ...
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