Minimally modified theories of gravity: a playground for testing the uniqueness of general relativity

29 Oct 2018 Carballo-Rubio Raúl Di Filippo Francesco Liberati Stefano

In a recent paper [1], it was introduced a new class of gravitational theories with two local degrees of freedom. The existence of these theories apparently challenges the distinctive role of general relativity as the unique non-linear theory of massless spin-2 particles... (read more)

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  • GENERAL RELATIVITY AND QUANTUM COSMOLOGY
  • HIGH ENERGY PHYSICS - THEORY