cosmology 1disformal transformations 1horndeski gravity 1multi-field extensions 1scalar-tensor theory 1
From the 1 of 2 linked papers with an AI index.
2 papers
gr-qc2026
A New Definition of Horndeski Theory and the Possibility of Multiple Scalar Field Extensions
Tomoki Katayama
The paper introduces a new axiomatic definition of Horndeski scalar‑tensor theory, recovers the standard single‑field action, and outlines a systematic approach for constructing mu…
gr-qc2026
Casimir-Induced Quintessence in Dark Dimension
Tomoki Katayama, Hiroki Matsui, Yuri Michinobu +3
We investigate a concrete realization of the Dark Dimension scenario, where a single large extra dimension is set at sub-millimeter scales. In this framework, the Casimir energy of…