University of Groningen
New effective theories of gravitation and their phenomenological consequences
Maldonado Torralba, Francisco José
DOI:
10.33612/diss.143961423
IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below.
Document Version
Publisher's PDF, also known as Version of record
Publication date: 2020
Link to publication in University of Groningen/UMCG research database
Citation for published version (APA):
Maldonado Torralba, F. J. (2020). New effective theories of gravitation and their phenomenological consequences. University of Groningen. https://doi.org/10.33612/diss.143961423
Copyright
Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).
Take-down policy
If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.
Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum.
Propositions
Accompanying the dissertation
New effective theories of gravitation and
their phenomenological consequences
1. Gravitational theories with torsion appear naturally when constructing a Poincaré gauge invariant theory of gravitation.
2. Only the two scalar modes of the usual quadratic Poincaré Gauge Gravity can propagate without introducing instabilities.
3. The non-geodesical behaviour of fermions in theories with torsion cannot prevent the appearance of singularities.
4. Only two class of quadratic Poincaré Gauge Gravity lagrangians fulfil the Birkhoff’s theorem.
5. A non-local extension of Poincaré Gauge Gravity can be constructed, and it can be made ghost- and singularity-free at the linear level.
6. In Infinite Derivative Gravity with torsion it is possible to observe non-local effects at a macroscopical level.
