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.

Unimodular quantum gravity and the cosmological constant / Percacci, R.. - In: FOUNDATIONS OF PHYSICS. - ISSN 0015-9018. - 48:10(2018), pp. 1364-1379. [10.1007/s10701-018-0189-5]

Unimodular quantum gravity and the cosmological constant

Percacci, R.
2018

Abstract

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.
48
10
1364
1379
https://link.springer.com/article/10.1007%2Fs10701-018-0189-5
https://arxiv.org/abs/1712.09903
Percacci, R.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/88131
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