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The canonical frame of purified gravity
Univ Salamanca, Dept Fis Fundamental, E-37008 Salamanca, Spain..
Swiss Fed Inst Technol, Inst Theoret Studies, Clausiusstr 47, CH-8092 Zurich, Switzerland..
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.ORCID iD: 0000-0002-9403-8565
2019 (English)In: International Journal of Modern Physics D, ISSN 0218-2718, Vol. 28, no 14, article id 1944012Article in journal (Refereed) Published
Abstract [en]

In the recently introduced gauge theory of translations, dubbed Coincident General Relativity (CGR), gravity is described with neither torsion nor curvature in the spacetime affine geometry. The action of the theory enjoys an enhanced symmetry and avoids the second derivatives that appear in the conventional Einstein-Hilbert action. While it implies the equivalent classical dynamics, the improved action principle can make a difference in considerations of energetics, thermodynamics and quantum theory. This paper reports on possible progress in those three aspects of gravity theory. In the so-called purified gravity, (1) energy-momentum is described locally by a conserved, symmetric tensor, (2) the Euclidean path integral is convergent without the addition of boundary or regulating terms and (3) it is possible to identify a canonical frame for quantization.

Place, publisher, year, edition, pages
World Scientific Publishing Co. Pte Ltd , 2019. Vol. 28, no 14, article id 1944012
Keywords [en]
Gravity, gravitational energy, teleparallel geometry
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-266226DOI: 10.1142/S0218271819440127ISI: 000500955400020Scopus ID: 2-s2.0-85074113791OAI: oai:DiVA.org:kth-266226DiVA, id: diva2:1382587
Note

QC 20200103

Available from: 2020-01-03 Created: 2020-01-03 Last updated: 2020-01-03Bibliographically approved

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Koivisto, Tomi S.

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