Results 41 to 50 of about 186,264 (366)
Conformal wave expansions for flat space amplitudes
Journal of High Energy Physics, 2021 The extended BMS algebra contains a conformal subgroup that acts on the celestial sphere as SO(1, 3). It is of interest to perform mode expansions of free fields in Minkowski spacetime that realize this symmetry in a simple way.
Chang Liu, David A. Lowe
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Effective field theories of post-Newtonian gravity: a comprehensive review [PDF]
Reports on progress in physics. Physical Society, 2018 This review article presents the progress made over the last decade, since the introduction of effective field theories (EFTs) into post-Newtonian (PN) gravity.
M. Levi
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Journal of High Energy Physics, 2020 A massive, nonrelativistic scalar field in an expanding spacetime is usually approximated by a pressureless perfect fluid, which leads to the standard conclusion that such a field can play the role of cold dark matter.
Borna Salehian +2 more
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Journal of High Energy Physics, 2023 It has recently been argued that half degrees of freedom could emerge in Lorentz and parity invariant field theories, using a non-linear Proca field theory dubbed Proca-Nuevo as a specific example.
Claudia de Rham +4 more
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The weak field limit of quantum matter back-reacting on classical spacetime [PDF]
Journal of High Energy Physics, 2023 Consistent coupling of quantum and classical degrees of freedom exists so long as there is both diffusion of the classical degrees of freedom and decoherence of the quantum system.
Isaac Layton +3 more
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Is Gravity Actually the Curvature of Spacetime? [PDF]
, 2019 The Einstein equations, apart from being the classical field equations of General Relativity, are also the classical field equations of two other theories of gravity.
Bahamonde, Sebastian, Faizal, Mir
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Integrability of classical strings dual for noncommutative gauge theories [PDF]
, 2014 We derive the gravity duals of noncommutative gauge theories from the Yang-Baxter sigma model description of the AdS_5xS^5 superstring with classical r-matrices.
Matsumoto, Takuya, Yoshida, Kentaroh
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Unimodular gravity vs general relativity: a status report [PDF]
Classical and quantum gravity, 2022 Unimodular gravity (UG) is an alternative to general relativity (GR) which, however, is so closely related to the latter that one can wonder to what extent they are different.
R. Carballo-Rubio +2 more
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Rényi mutual information in quantum field theory, tensor networks, and gravity [PDF]
Journal of High Energy Physics, 2023 We explore a large class of correlation measures called the α − z Rényi mutual informations (RMIs). Unlike the commonly used notion of RMI involving linear combinations of Rényi entropies, the α − z RMIs are positive semi-definite and monotonically ...
Jonah Kudler-Flam, L. Nie, Akash Vijay
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On scalar and vector fields coupled to the energy-momentum tensor
Journal of High Energy Physics, 2018 We consider theories for scalar and vector fields coupled to the energy-momentum tensor. Since these fields also carry a non-trivial energy-momentum tensor, the coupling prescription generates self-interactions. In analogy with gravity theories, we build
Jose Beltrán Jiménez +2 more
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