Quantum Non-Gravity and Stellar Collapse

Details Quantum Non-Gravity and Stellar Collapse Quantum Non-Gravity and Stellar Collapse

2010-02-24

arxiv.org/abs/1002.4651v2

Found.Phys.41:1532-1541,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, 2 figures. v2: Partially restructured; potentially observable consequence added. Several clarifications + 3 new refer

Scientific paper

10.1007/s10701-011-9577-9

Observational indications combined with analyses of analogue and emergent gravity in condensed matter systems support the possibility that there might be two distinct energy scales related to quantum gravity: the scale that sets the onset of quantum gravitational effects $E_B$ (related to the Planck scale) and the much higher scale $E_L$ signalling the breaking of Lorentz symmetry. We suggest a natural interpretation for these two scales: $E_L$ is the energy scale below which a special relativistic spacetime emerges, $E_B$ is the scale below which this spacetime geometry becomes curved. This implies that the first `quantum' gravitational effect around $E_B$ could simply be that gravity is progressively switched off, leaving an effective Minkowski quantum field theory up to much higher energies of the order of $E_L$. This scenario may have important consequences for gravitational collapse, inasmuch as it opens up new possibilities for the final state of stellar collapse other than an evaporating black hole.

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