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Novel nonlinear kinetic terms for gravitons

2015/08/31 by Wenliang Li
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Class (philosophy) #Classical mechanics #Computer science #Context (archaeology) #Cosmology and Gravitation Theories #Curvature #Derivative (finance) #Geometry #Gravitation #Graviton #Mathematical physics #Mathematics #Minisuperspace #Nonlinear system #Physics #Quantum Electrodynamics and Casimir Effect #Quantum gravity #Quantum mechanics #Theoretical physics #Wedge (geometry) #gr-qc #hep-th

paper · pdf · doi:10.1103/physrevd.94.064078

published as Phys. Rev. D 94, 064078 (2016) · 19 pages, two columns, v3.1; a reference is added

openalex publication_date 2016/09/30 · arxiv created 2017/10/19 · arxiv updated 2017/10/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A set of novel derivative terms for spin-2 fields are proposed. They are the wedge products of curvature two-forms and vielbeins. In this work, we investigate the properties of novel two-derivative terms in the context of bigravity. Based on a minisuperspace analysis, we identify a large class of bigravity models where the Boulware-Deser ghost could be absent. We give a new perspective that Weyl gravity and new massive gravity belong to this class of bigravity models involving novel derivative terms. This is related to the fact that this class of models contains spin-2 ghosts. In addition, we discuss the UV cutoff scales, dynamical symmetric conditions, and novel higher-derivative terms.

Citations