Matches in SemOpenAlex for { <https://semopenalex.org/work/W2968116735> ?p ?o ?g. }
Showing items 1 to 92 of
92
with 100 items per page.
- W2968116735 abstract "We revisit models, within the Einstein-Cartan theory, where the cosmological constant $Lambda$ is promoted to a variable, at the cost of allowing for torsion even in the absence of spinors. We remark that some standard notions about FRW Universes collapse in these theories, most notably spatial homogeneity and isotropy may now co-exist with violations of parity invariance. The parity violating solutions have non-vanishing Weyl curvature even within FRW models. The presence of parity violating torsion opens up the space of possible such theories with relevant FRW modifications: in particular the Pontryagin term can play an important role even in the absence of spinorial matter. We present a number of parity violating solutions with and without matter. The former are the non-self dual vacuum solutions long suspected to exist. The latter lead to tracking and non-tracking solutions with a number of observational problems, unless we invoke the Pontryagin term. An examination of the Hamiltonian structure of the theory reveals that the parity even and the parity violating solutions belong to two distinct branches of the theory, with different gauge symmetries (constraints) and different numbers of degrees of freedom. The parity even branch is nothing but standard relativity with a cosmological constant which has become pure gauge under conformal invariance if matter is absent, or a slave of matter (and so not an independent degree of freedom) if non-conformally invariant matter is present. In contrast, the parity violating branch contains a genuinely new degree of freedom." @default.
- W2968116735 created "2019-08-22" @default.
- W2968116735 creator A5042730475 @default.
- W2968116735 creator A5082163810 @default.
- W2968116735 date "2019-10-16" @default.
- W2968116735 modified "2023-10-03" @default.
- W2968116735 title "Parity violating Friedmann universes" @default.
- W2968116735 cites W1479738231 @default.
- W2968116735 cites W1482812467 @default.
- W2968116735 cites W1652486389 @default.
- W2968116735 cites W1964214158 @default.
- W2968116735 cites W1978898368 @default.
- W2968116735 cites W1987251920 @default.
- W2968116735 cites W2007073865 @default.
- W2968116735 cites W2019324481 @default.
- W2968116735 cites W2022441218 @default.
- W2968116735 cites W2036707580 @default.
- W2968116735 cites W2059114557 @default.
- W2968116735 cites W2064913826 @default.
- W2968116735 cites W2094950708 @default.
- W2968116735 cites W2100367618 @default.
- W2968116735 cites W2147088395 @default.
- W2968116735 cites W2160024478 @default.
- W2968116735 cites W2586994049 @default.
- W2968116735 cites W2594158376 @default.
- W2968116735 cites W2737620750 @default.
- W2968116735 cites W2756261334 @default.
- W2968116735 cites W2810078132 @default.
- W2968116735 cites W2962982260 @default.
- W2968116735 cites W2963562679 @default.
- W2968116735 cites W2963754816 @default.
- W2968116735 cites W2972233786 @default.
- W2968116735 cites W3098784064 @default.
- W2968116735 cites W3102219769 @default.
- W2968116735 cites W3102861075 @default.
- W2968116735 cites W3104476398 @default.
- W2968116735 cites W3196699907 @default.
- W2968116735 doi "https://doi.org/10.1103/physrevd.100.084036" @default.
- W2968116735 hasPublicationYear "2019" @default.
- W2968116735 type Work @default.
- W2968116735 sameAs 2968116735 @default.
- W2968116735 citedByCount "25" @default.
- W2968116735 countsByYear W29681167352019 @default.
- W2968116735 countsByYear W29681167352020 @default.
- W2968116735 countsByYear W29681167352021 @default.
- W2968116735 countsByYear W29681167352022 @default.
- W2968116735 countsByYear W29681167352023 @default.
- W2968116735 crossrefType "journal-article" @default.
- W2968116735 hasAuthorship W2968116735A5042730475 @default.
- W2968116735 hasAuthorship W2968116735A5082163810 @default.
- W2968116735 hasBestOaLocation W29681167352 @default.
- W2968116735 hasConcept C109214941 @default.
- W2968116735 hasConcept C121332964 @default.
- W2968116735 hasConcept C26405456 @default.
- W2968116735 hasConcept C2777151079 @default.
- W2968116735 hasConcept C30864177 @default.
- W2968116735 hasConcept C33332235 @default.
- W2968116735 hasConcept C37914503 @default.
- W2968116735 hasConcept C62520636 @default.
- W2968116735 hasConceptScore W2968116735C109214941 @default.
- W2968116735 hasConceptScore W2968116735C121332964 @default.
- W2968116735 hasConceptScore W2968116735C26405456 @default.
- W2968116735 hasConceptScore W2968116735C2777151079 @default.
- W2968116735 hasConceptScore W2968116735C30864177 @default.
- W2968116735 hasConceptScore W2968116735C33332235 @default.
- W2968116735 hasConceptScore W2968116735C37914503 @default.
- W2968116735 hasConceptScore W2968116735C62520636 @default.
- W2968116735 hasFunder F4320333065 @default.
- W2968116735 hasFunder F4320334632 @default.
- W2968116735 hasFunder F4320338335 @default.
- W2968116735 hasIssue "8" @default.
- W2968116735 hasLocation W29681167351 @default.
- W2968116735 hasLocation W29681167352 @default.
- W2968116735 hasLocation W29681167353 @default.
- W2968116735 hasLocation W29681167354 @default.
- W2968116735 hasOpenAccess W2968116735 @default.
- W2968116735 hasPrimaryLocation W29681167351 @default.
- W2968116735 hasRelatedWork W1556896765 @default.
- W2968116735 hasRelatedWork W2005540690 @default.
- W2968116735 hasRelatedWork W2027103703 @default.
- W2968116735 hasRelatedWork W2060028965 @default.
- W2968116735 hasRelatedWork W2112137409 @default.
- W2968116735 hasRelatedWork W2160293638 @default.
- W2968116735 hasRelatedWork W2162108205 @default.
- W2968116735 hasRelatedWork W2969684808 @default.
- W2968116735 hasRelatedWork W3146615377 @default.
- W2968116735 hasRelatedWork W3160844726 @default.
- W2968116735 hasVolume "100" @default.
- W2968116735 isParatext "false" @default.
- W2968116735 isRetracted "false" @default.
- W2968116735 magId "2968116735" @default.
- W2968116735 workType "article" @default.