Zobrazeno 1 - 10
of 13 031
pro vyhledávání: '"Koivisto, 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
Autor:
Weiste, Elina, Stevanovic, Melisa, Koskela, Inka, Paavolainen, Maria, Korkiakangas, Eveliina, Koivisto, Tiina, Levonius, Vilja, Laitinen, Jaana
Publikováno v:
Journal of Health Organization and Management, 2024, Vol. 38, Issue 9, pp. 313-328.
Externí odkaz:
http://www.emeraldinsight.com/doi/10.1108/JHOM-01-2024-0006
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
General (tele)parallel Relativity, G$_\parallel$R, is the relativistic completion of Einstein's theories of gravity. The focus of this article is the derivation of the homogeneous and isotropic solution in G$_\parallel$R. The first-principles derivat
Externí odkaz:
http://arxiv.org/abs/2309.08554