Non-singular and ghost-free infinite derivative gravity with torsion

Abstract

We present the most general quadratic curvature action with torsion including infinite covariant derivatives and study its implications around the Minkowski background via the Palatini approach. Provided the torsion is solely given by the background axial field, the metric and torsion are shown to decouple, and both of them can be made ghost and singularity free for a fermionic source.

arXiv comment5 pages, 1 figure. Minor changes, conclusions unchanged

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Cited by in corpus (16)

• Teleparallel Gravity: From Theory to Cosmology
• Nonlocal star as a blackhole mimicker
• Generalized ghost-free propagators in nonlocal field theories
• Revisiting the Stability of Quadratic Poincaré Gauge Gravity
• Minimal coupling in presence of non-metricity and torsion
• Nonlocal generalization of Galilean theories and gravity
• Nonlocality amplifies echoes
• Ghost-free modification of the Polyakov action and Hawking radiation
• Conformally invariant proper time with general non-metricity
• Perturbations in higher derivative gravity beyond maximally symmetric spacetimes
• The cosmological principle in theories with torsion: The case of Einstein-Cartan-Dirac-Maxwell gravity
• Junction conditions in infinite derivative gravity
• Black holes in non-local gravity
• Nonlocal scalar field in an external potential: WKB approximation
• Smearing out contact terms in ghost-free infinite derivative quantum gravity
• New effective theories of gravitation and their phenomenological consequences