2019/02/28 by Clare Burrage, Christian Käding, Peter Millington +1 · 12 citations
Mathematics · Physics and Astronomy · #Classical mechanics #Cosmology and Gravitation Theories #Curvature #General relativity #Gravitation #Mathematical physics #Mathematics #Minimal coupling #Physics #Quantum #Quantum Mechanics and Applications #Quantum decoherence #Quantum mechanics #Relativity and Gravitational Theory #Scalar (mathematics) #Theoretical physics #astro-ph.CO #gr-qc #hep-ph #hep-th #quant-ph
paper · pdf · doi:10.1088/1742-6596/1275/1/012041
published in Journal of Physics Conference Series 1275(1), 012041 (IOP Publishing) · 9 pages, JPCS format. Contribution to the proceedings of the 9th International Workshop DICE2018 Spacetime - Matter - Quantum Mechanics, 17-21 September 2018, Castiglioncello, Italy. Presented by P. Millington. This revision includes minor corrections, additional clarifications and updated references relative to the version of record
openalex publication_date 2019/09/01 · arxiv created 2019/10/11 · arxiv updated 2019/10/14 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/05
Abstract Some of the simplest modifications to general relativity involve the coupling of additional scalar fields to the scalar curvature. By making a Weyl rescaling of the metric, these theories can be mapped to Einstein gravity with the additional scalar fields instead being coupled universally to matter. The resulting couplings to matter give rise to scalar fifth forces, which can evade the stringent constraints from local tests of gravity by means of so-called screening mechanisms. In this talk, we derive evolution equations for the matrix elements of the reduced density operator of a toy matter sector by means of the Feynman-Vernon influence functional. In particular, we employ a novel approach akin to the LSZ reduction more familiar to scattering-matrix theory. The resulting equations allow the analysis, for instance, of decoherence induced in atom-interferometry experiments by these classes of modified theories of gravity.