21 citations · 54 across the 11 of their papers we have counts for
11 papers
The silent dark sector: a field-theory approach to unified dark fluids with vanishing speed of sound
Javier de Cruz Pérez, Darío Jaramillo-Garrido, Antonio L. Maroto +1
We introduce a novel class of field-theory models that provide a unified description of the dark sector as a single perfect fluid with vanishing sound speed. These models also admi…
Cosmological perturbations of TDiff fields
Antonio L. Maroto, Prado Martín-Moruno, Diego Tessainer
We study scalar field theories that break diffeomorphism invariance down to the subgroup of transverse diffeomorphisms through the matter sector in cosmological backgrounds. We foc…
Inflation in theories with broken diffeomorphisms
Antonio L. Maroto, Prado Martín-Moruno, Miguel Orbaneja-Pérez
We analyze the impact of breaking diffeomorphism invariance in the inflaton sector. In particular, we consider inflaton models which are invariant under the subgroup of transverse…
Multifield theories invariant under transverse diffeomorphisms: The mixed regime case
Antonio L. Maroto, Prado Martín-Moruno, Diego Tessainer
We study theories breaking diffeomorphism (Diff) invariance down to the subgroup of transverse diffeomorphisms (TDiff), consisting of multiple scalar fields in a cosmological backg…
CDM from broken diffeomorphisms
Javier de Cruz Pérez, Antonio L. Maroto
We present a simple field theory model with reduced invariance under diffeomorphisms whose energy-momentum tensor is identical to the sum of pressureless irrotational matter and a…
Multi-field TDiff theories for cosmology
Diego Tessainer, Antonio L. Maroto, Prado Martín-Moruno
We consider theories which break the invariance under diffeomorphisms (Diff) down to transverse diffeomorphisms (TDiff) in the matter sector, consisting of multiple scalar fields.…
TDiff-fuelled cosmic magnetic fields
Antonio L. Maroto, Alfredo D. Miravet
We explore the consequences of the breaking of diffeomorphism (Diff) invariance in the electromagnetic sector. We consider the breaking of Diff symmetry down to the subgroup of tra…
A class of ghost-free theories in symmetric teleparallel geometry
Antonio G. Bello-Morales, Jose Beltrán Jiménez, Alejandro Jiménez Cano +2
Theories formulated in the arena of teleparallel geometries are generically plagued by ghost-like instabilities or other pathologies that are ultimately caused by the breaking of s…
TDiff invariant gauge fields in cosmology
Antonio L. Maroto, Alfredo D. Miravet
We study the dynamics of Abelian gauge fields invariant under transverse diffeomorphisms (TDiff) in cosmological contexts. We show that in the geometric optics approximation, very…
Symmetry restoration for TDiff scalar fields
Darío Jaramillo-Garrido, Antonio L. Maroto, Prado Martín-Moruno
We explore the idea of restoring the full diffeomorphism (Diff) invariance in theories with only transverse diffeomorphisms (TDiff) by the introduction of additional fields. In par…
A unified TDiff invariant field theory for the dark sector
David Alonso-López, Javier de Cruz Pérez, Antonio L. Maroto
In this work we present a unified model for the cosmological dark sector. The theory is based on a simple minimally coupled scalar field whose action only contains a canonical kine…