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Canonical structure of minimal varying Λ theories
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SYSNO ASEP 0554741 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Canonical structure of minimal varying Λ theories Author(s) Alexandrov, S. (FR)
Speziale, S. (FR)
Zlosnik, Thomas (FZU-D) ORCIDNumber of authors 3 Article number 175011 Source Title Classical and Quantum Gravity. - : Institute of Physics Publishing - ISSN 0264-9381
Roč. 38, č. 17 (2021)Number of pages 36 s. Language eng - English Country GB - United Kingdom Keywords background ; symmetry: conformal ; de Sitter Subject RIV BE - Theoretical Physics OECD category Particles and field physics R&D Projects GA20-28525S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000684380400001 EID SCOPUS 85113321385 DOI 10.1088/1361-6382/ac1852 Annotation Minimal varying Λ theories are defined by an action built from the Einstein–Cartan–Holst first order action for gravity with the cosmological constant Λ as an independent scalar field, and supplemented by the Euler and Pontryagin densities multiplied by 1/Λ. We identify the canonical structure of these theories which turn out to represent an example of irregular systems. We find five degrees of freedom on generic backgrounds and for generic values of parameters, whereas if the parameters satisfy a certain condition (which includes the most commonly considered Euler case) only three degrees of freedom remain. On de Sitter-like backgrounds the canonical structure changes, and due to an emergent conformal symmetry one degree of freedom drops from the spectrum. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address https://doi.org/10.1088/1361-6382/ac1852
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