2016/04/30 by Michele Arzano, Gianluca Calcagni · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #Gravitational wave #Noncommutative and Quantum Gravity Theories #Physics #Quantum #Quantum field theory in curved spacetime #Quantum gravity #Quantum mechanics #Spacetime #Theoretical physics #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.93.124065
published as Phys. Rev. D 93, 124065 (2016) · 5 pages. v2: one paragraph, one note, and references added; v3: publication data added
openalex publication_date 2016/06/27 · arxiv created 2016/06/28 · arxiv updated 2016/06/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss various modified dispersion relations motivated by quantum gravity which might affect the propagation of the recently observed gravitational-wave signal of the event GW150914. We find that the bounds set by the data on the characteristic quantum-gravity mass scale M are too weak to constrain these scenarios and, in general, much weaker than the expected M>104 eV for a correction to the dispersion relation linear in 1/M. We illustrate this issue by giving lower bounds on M, plus an upper bound coming from constraints on the size of a quantum ergosphere. We also show that a phenomenological dispersion relation \ensuremathω2=k2(1+\ensuremathαkn/Mn) is compatible with observations and, at the same time, has a phenomenologically viable mass M>10 TeV only in the quite restrictive range 0<n<0.68. Remarkably, this is the domain of multiscale spacetimes but not of known quantum-gravity models.