Unimodular quantum gravity and the cosmological constant - INSPIRE

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Unimodular quantum gravity and the cosmological constant

R. Percacci
(
- INFN, Trieste and
- SISSA, Trieste
)

Dec 28, 2017

16 pages

Published in:

Found.Phys. 48 (2018) 10, 1364-1379

Contribution to:

Black Holes, Gravitational Waves and Spacetime Singularities, 1364-1379

Published: Jun 27, 2018

e-Print:

1712.09903 [gr-qc]

DOI:

10.1007/s10701-018-0189-5 (publication)

View in:

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Abstract: (arXiv)

It is shown that the one-loop effective action of unimodular gravity is the same as that of ordinary gravity, restricted to unimodular metrics. The only difference is in the treatment of the global scale degree of freedom and of the cosmological term. A constant vacuum energy does not gravitate, addressing one aspect of the cosmological constant problem.

Note:

Prepared for the proceedings of the workshop "Black holes, gravitational waves and spacetime singularities", held at the Vatican Observatory, Castel Gandolfo (Rome) May 9 - 12, 2017

Cosmology
Quantum gravity
Cosmological constant
Unimodular
gravitation: unimodular
vacuum state: energy
cosmological constant
effective action
quantum gravity

References(61)

Figures(0)

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