From the 1 of 5 linked papers with an AI index.
5 papers
Physical nonviability of in the scalar-tensor representation
Jose Beltrán Jiménez, Alejandro Jiménez Cano, Tomi S. Koivisto
The authors demonstrate that the scalar‑tensor representation of f(Q) gravity inevitably contains a propagating ghost degree of freedom, confirming its physical non‑viability.
A solid unification of the dark sector
Jose Beltrán Jiménez, MarÃa Pérez Garrote, Florencia A. Teppa Pannia +1
We construct a unified description of dark matter and dark energy in terms of a single dark component that behaves as a pressureless fluid in the early Universe and undergoes a tra…
Euclidean teleparallel relativity and black hole partition functions
Jose Beltrán Jiménez, Tomi S. Koivisto
The Euclidean path integral approach to quantum gravity is conventionally formulated in terms of the Einstein-Hilbert-York-Gibbons-Hawking action, which requires suitable subtracti…
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…
Resilience of DBI screened objects and their ladder symmetries
Jose Beltrán Jiménez, Dario Bettoni, Philippe Brax
Scalar field theories with a shift symmetry come equipped with the -mouflage (or kinetic screening) mechanism that suppresses the scalar interaction between massive objects belo…