Zobrazeno 1 - 10
of 3 691
pro vyhledávání: '"Koivisto, P A"'
A well-known result of Shalom says that lattices in SO$(n,1)$ are $L^p$ measure equivalent for all $p
Externí odkaz:
http://arxiv.org/abs/2411.10250
Autor:
Koivisto, Tomi S., Zheng, Luxi
Black hole solutions are explored in the Lorentz gauge theory of gravity. The fields of the theory are the gauge potential in the adjoint and a scalar in the fundamental representation of the Lorentz group, a metric tensor then emerging as a composit
Externí odkaz:
http://arxiv.org/abs/2408.10100
Autor:
Bello-Morales, Antonio G., Jiménez, Jose Beltrán, Cano, Alejandro Jiménez, Maroto, Antonio L., Koivisto, Tomi S.
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 some symmetries. In this work, we construct a class of ghost-free theor
Externí odkaz:
http://arxiv.org/abs/2406.19355
Motivated by cosmological applications for interacting matters, an extension of the action functional for relativistic fluids is proposed to incorporate the physics of non-adiabatic processes and chemical reactions. The former are characterised by en
Externí odkaz:
http://arxiv.org/abs/2406.01412
Autor:
Iosifidis, Damianos, Koivisto, Tomi S.
We explore a new action formulation of hyperfluids, fluids with intrinsic hypermomentum. Brown's Lagrangian for a relativistic perfect fluid is generalised by incorporating the degrees of freedom encoded in the hypermomentum tensor, namely by includi
Externí odkaz:
http://arxiv.org/abs/2312.06780
A novel first order action principle has been proposed as the possible foundation for a more fundamental theory of General Relativity and the Standard Model. It is shown in this article that the proposal consistently incorporates gravity and matter f
Externí odkaz:
http://arxiv.org/abs/2311.07464
The intrinsic presence of ghosts in the symmetric teleparallel framework is elucidated. We illustrate our general arguments in $f(\mathbb{Q})$ theories by studying perturbations in the three inequivalent spatially flat cosmologies. Two of these branc
Externí odkaz:
http://arxiv.org/abs/2311.04201
Autor:
Angot, Julien, Tarvainen, Olli, Koivisto, Hannu, Luntinen, Miha, Thuillier, Thomas, Toivanen, Ville
The consecutive transients (CT) method is a diagnostics approach combining experimental and computational techniques to probe the plasma parameters of Charge Breeder Electron Cyclotron Resonance Ion Sources (CB-ECRIS). The method is based on short pu
Externí odkaz:
http://arxiv.org/abs/2310.11185
Autor:
Jani Paulin, Mari Lahti, Heikki Riihimäki, Joonas Hänninen, Tero Vesanen, Mari Koivisto, Laura-Maria Peltonen
Publikováno v:
BMC Emergency Medicine, Vol 24, Iss 1, Pp 1-9 (2024)
Abstract Background Violence against Emergency Medical Services (EMS) personnel vary between studies. Current studies are mainly based on self-reporting, thus other designs are needed to provide more perspective. The purpose of this study was to expl
Externí odkaz:
https://doaj.org/article/10f2252a178b47ed9042b5e260dc543c
Publikováno v:
BMC Geriatrics, Vol 24, Iss 1, Pp 1-10 (2024)
Abstract Background Mental distress among retirees and older people is a severe public health challenge, and information on new risk groups is needed. This study aims to identify subgroups of old-age retirees with varying associations between low soc
Externí odkaz:
https://doaj.org/article/1ab283882e41489ca7ceaaeda7134218