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DC Field | Value | Language |
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dc.contributor.author | Bernardo, Reginald Christian | - |
dc.contributor.author | Said, Jackson | - |
dc.contributor.author | Caruana, Maria | - |
dc.contributor.author | Appleby, Stephen | - |
dc.date.accessioned | 2022-02-16T08:14:24Z | - |
dc.date.available | 2022-02-16T08:14:24Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Bernardo, R. C., Said, J. L., Caruana, M., & Appleby, S. (2021). Well-tempered Minkowski solutions in teleparallel Horndeski theory. Classical and Quantum Gravity, 39(1), 015013. | en_GB |
dc.identifier.uri | https://www.um.edu.mt/library/oar/handle/123456789/89177 | - |
dc.description.abstract | Well-tempering stands among the few classical methods of screening vacuum energy to deliver a late-time, low energy vacuum state. We build on the class of Horndeski models that admit a Minkowski vacuum state despite the presence of an arbitrarily large vacuum energy to obtain a much larger family of models in teleparallel Horndeski theory. We set up the routine for obtaining these models and present a variety of cases, all of which are able to screen a natural particle physics scale vacuum energy using degeneracy in the field equations. We establish that well-tempering is the unique method of utilizing degeneracy in Horndeski scalar-tensor gravity—and its teleparallel generalisation—that can accommodate self-tuned flat Minkowski solutions, when the explicit scalar field dependence in the action is minimal (a tadpole and a conformal coupling to the Ricci scalar). Finally, we study the dynamics of the well-tempered teleparallel Galileon. We generate its phase portraits and assess the attractor nature of the Minkowski vacuum under linear perturbations and through a phase transition of vacuum energy. | en_GB |
dc.description.sponsorship | String theory | en_GB |
dc.language.iso | en | en_GB |
dc.publisher | IOP Publishing Ltd | en_GB |
dc.rights | info:eu-repo/semantics/restrictedAccess | en_GB |
dc.subject | Astronomy -- Observations | en_GB |
dc.subject | Gravitation | en_GB |
dc.subject | Observations, Astronomical | en_GB |
dc.subject | Cosmology | en_GB |
dc.subject | Quantum field theory | en_GB |
dc.title | Well-tempered Minkowski solutions in teleparallel Horndeski theory | en_GB |
dc.type | article | en_GB |
dc.rights.holder | The copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder. | en_GB |
dc.description.reviewed | peer-reviewed | en_GB |
dc.identifier.doi | 10.1088/1361-6382/ac36e4 | - |
dc.publication.title | Classical and Quantum Gravity | en_GB |
Appears in Collections: | Scholarly Works - InsSSA |
Files in This Item:
File | Description | Size | Format | |
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Well-tempered Minkowski solutions in teleparallel Horndeski theory.pdf Restricted Access | 1.83 MB | Adobe PDF | View/Open Request a copy | |
2108.02500.pdf | ArXiv ePrint | 1.12 MB | Adobe PDF | View/Open |
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