Classical theories of gravity produce entanglement. [PDF]
NatureThe unification of gravity and quantum mechanics remains one of the most profound open questions in science. With recent advances in quantum technology, an experimental idea first proposed by Richard Feynman1 is now regarded as a promising route to ...
Aziz J, Howl R.
europepmc +4 more sources
Renormalizable acausal theories of classical gravity coupled with interacting quantum fields [PDF]
Classical and Quantum Gravity, 2006 We prove the renormalizability of various theories of classical gravity coupled with interacting quantum fields. The models contain vertices with dimensionality greater than four, a finite number of matter operators and a finite or reduced number of ...
't Hooft G +14 more
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Classical Weyl Transverse Gravity [PDF]
, 2016 We study various classical aspects of the Weyl transverse (WTDiff) gravity in a general space-time dimension. First of all, we clarify a classical equivalence among three kinds of gravitational theories, those are, the conformally-invariant scalar tensor
Oda, Ichiro
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Effective action of dilaton gravity as the classical double copy of Yang-Mills theory [PDF]
Physical Review D, 2018 We compute the classical effective action of color charges moving along worldlines by integrating out the Yang-Mills gauge field to next-to-leading order in the coupling.
J. Plefka +2 more
semanticscholar +5 more sources
Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models [PDF]
, 2011 Classical generalization of general relativity is considered as gravitational alternative for unified description of the early-time inflation with late-time cosmic acceleration.
Nojiri, Shin'ichi, Odintsov, Sergei D.
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Entropy-current for dynamical black holes in Chern-Simons theories of gravity [PDF]
Journal of High Energy Physics, 2023 We construct an entropy current and establish a local version of the classical second law of thermodynamics for dynamical black holes in Chern-Simons (CS) theories of gravity.
Ishan Deo, Prateksh Dhivakar, N. Kundu
semanticscholar +1 more source
Reconstructing wormhole solutions in curvature based Extended Theories of Gravity [PDF]
The European Physical Journal C, 2021 Static and spherically symmetric wormhole solutions can be reconstructed in the framework of curvature based Extended Theories of Gravity. In particular, extensions of the General Relativity, in metric and curvature formalism give rise to modified ...
Vittorio De Falco +3 more
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Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A ∗ [PDF]
Classical and quantum gravity, 2022 Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime.
S. Vagnozzi +3 more
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Any consistent coupling between classical gravity and quantum matter is fundamentally irreversible [PDF]
Quantum, 2023 When gravity is sourced by a quantum system, there is tension between its role as the mediator of a fundamental interaction, which is expected to acquire nonclassical features, and its role in determining the properties of spacetime, which is inherently ...
Thomas D. Galley +2 more
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Classical and quantum gravity with fractional operators [PDF]
Classical and quantum gravity, 2021 Following the same steps made for a scalar field in a parallel publication, we propose a class of perturbative theories of quantum gravity based on fractional operators, where the kinetic operator of the graviton is made of either fractional derivatives ...
G. Calcagni
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