REVIEW 5 cited by
Interacting quintessence from a variational approach Part II: derivative couplings
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Interacting quintessence from a variational approach Part II: derivative couplings
read the original abstract
We consider an original variational approach for building new models of quintessence interacting with dark or baryonic matter. The coupling is introduced at the Lagrangian level using a variational formulation for relativistic fluids, where the interacting term generally depends on both the dynamical degrees of freedom of the theory and their spacetime derivatives. After deriving the field equations from the action, we consider applications in the context of cosmology. Two simple models are studied using dynamical system techniques showing the interesting phenomenology arising in this framework. We find that these models contain dark energy dominated late time attractors with early time matter dominated epochs and also obtain a possible dynamical crossing of the phantom barrier. The formulation and results presented here complete and expand the analysis exposed in the first part of this work, where only algebraic couplings, without spacetime derivatives, were considered.
Forward citations
Cited by 5 Pith papers
-
Disentangling Similarity and Relatedness in Topic Models
Topic models lie on a spectrum from thematic-relatedness-rich to similarity-rich, and that position predicts which downstream tasks they handle well.
-
Phantom-divide crossing and suppressed structure growth in kinetically braided dark energy with momentum exchange
A linearly stable kinetic-braiding dark-energy model with CDM momentum exchange realizes upward phantom-divide crossing and weak CDM gravitational clustering, altering matter and CMB spectra.
-
Revisiting observational constraints on coupled exponential quintessence with energy and momentum transfers: degeneracy with massive neutrinos
Allowing the neutrino mass to vary removes the 2σ evidence for momentum transfer between dark energy and dark matter in coupled quintessence, via a degeneracy with the energy-exchange coupling.
-
Disentangling Similarity and Relatedness in Topic Models
Topic-model families occupy distinct positions on a similarity–relatedness plane, and those positions predict which downstream tasks they help or hurt.
-
Dark matter-baryons elastic coupling
A new dark-matter–baryon momentum-transfer interaction suppresses small-scale clustering and is mildly preferred by data when a low-redshift S8 measurement is included.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.