Zobrazeno 1 - 10
of 2 918
pro vyhledávání: '"A. Kaeding"'
Light scalar fields play a variety of roles in modern physics, especially in cosmology and modified theories of gravity. For this reason, there is a zoo of experiments actively trying to find evidence for many scalar field models that have been propo
Externí odkaz:
http://arxiv.org/abs/2407.20658
Publikováno v:
Universe 2024, 10(7), 297
The last few decades have provided abundant evidence for physics beyond the two standard models of particle physics and cosmology. As is now known, the by far largest part of our universe's matter/energy content lies in the `dark' and consists of dar
Externí odkaz:
http://arxiv.org/abs/2405.14638
Understanding the nature of dark energy and dark matter is one of modern physics' greatest open problems. Scalar-tensor theories with screened scalar fields like the chameleon model are among the most popular proposed solutions. In this article, we p
Externí odkaz:
http://arxiv.org/abs/2404.02630
We use previously obtained experimental results by neutron interferometry to effectively constrain the parameter space of several prominent dark energy models. This investigation encompasses the environment-dependent dilaton field, a compelling conte
Externí odkaz:
http://arxiv.org/abs/2310.18109
Autor:
Liebenow, Johannes, Imort, Timothy, Fuchs, Yannick, Heisel, Marcel, Käding, Nadja, Rupp, Jan, Mohammadi, Esfandiar
Valuable insights, such as frequently visited environments in the wake of the COVID-19 pandemic, can oftentimes only be gained by analyzing sensitive data spread across edge-devices like smartphones. To facilitate such an analysis, we present a toolc
Externí odkaz:
http://arxiv.org/abs/2309.12483
Autor:
Fischer, Hauke, Käding, Christian, Sedmik, René I. P., Abele, Hartmut, Brax, Philippe, Pitschmann, Mario
The environment-dependent dilaton field is a well-motivated candidate for dark energy and naturally arises in the strong coupling limit of string theory. In this article, we present the very first experimental constraints on the parameters of this mo
Externí odkaz:
http://arxiv.org/abs/2307.00243
In modern cosmology, scalar fields with screening mechanisms are often used as explanations for phenomena like dark energy or dark matter. Amongst a zoo of models, the environment dependent dilaton, screened by the Polyakov-Damour mechanism, is one o
Externí odkaz:
http://arxiv.org/abs/2306.10896
Autor:
Käding, Christian
Generalized symmetrons are models that have qualitatively similar features to the archetypal symmetron, but have barely been studied. In this article, we investigate for what parameter values the fifth forces induced by disformally coupling generaliz
Externí odkaz:
http://arxiv.org/abs/2304.05875
The neutron optical Lloyd interferometer can serve as a potent experiment for probing fundamental physics beyond the standard models of particles and cosmology. In this article, we provide a full Green's function analysis of a Lloyd interferometer in
Externí odkaz:
http://arxiv.org/abs/2302.11429
We explore two hypotheses. First, the possibility that the quantum vacuum energy density of the Casimir effect contributes to a (local) gravitational vacuum energy density. Second, the possibility that a change in the gravitational coupling implies a
Externí odkaz:
http://arxiv.org/abs/2211.00662