Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Giesel, Kristina"'
Autor:
Achour, Jibril Ben, Benedetti, Dario, Bojowald, Martin, Brandenberger, Robert, Butera, Salvatore, Ferrero, Renata, Giacomini, Flaminia, Giesel, Kristina, Goeller, Christophe, Haas, Tobias, Höhn, Philipp A., Kirklin, Joshua, Marchetti, Luca, Oriti, Daniele, Percacci, Roberto, Pereira, Antonio D., Pithis, Andreas G. A., Sakellariadou, Mairi, Steinhaus, Sebastian, Thürigen, Johannes
This collection of perspective pieces captures recent advancements and reflections from a dynamic research community dedicated to bridging quantum gravity, hydrodynamics, and emergent cosmology. It explores four key research areas: (a) the interplay
Externí odkaz:
http://arxiv.org/abs/2411.12628
Reference frames are crucial for describing local observers in general relativity. In quantum gravity, different proposals exist for how to treat reference frames. There are models with either classical or quantum reference frames. Recently, differen
Externí odkaz:
http://arxiv.org/abs/2410.17339
Autor:
Fahn, Max Joseph, Giesel, Kristina
We investigate the one-particle sector for the field-theoretical model of gravitationally induced decoherence for a scalar field in [1] with a special focus on the renormalisation of the one-particle master equation. In contrast to existing models in
Externí odkaz:
http://arxiv.org/abs/2409.12790
We present further applications of the formalism introduced by the authors in arXiv:2308.10949, which allows embedding of a broad class of generalized LTB models into effective spherically symmetric spacetimes. We focus on regular black hole models,
Externí odkaz:
http://arxiv.org/abs/2405.03554
Autor:
Domi, Alba, Eberl, Thomas, Fahn, Max Joseph, Giesel, Kristina, Hennig, Lukas, Katz, Ulrich, Kemper, Roman, Kobler, Michael
In this work, a microscopic quantum mechanical model for gravitationally induced decoherence introduced by Blencowe and Xu is investigated in the context of neutrino oscillations. The focus is on the comparison with existing phenomenological models a
Externí odkaz:
http://arxiv.org/abs/2403.03106
Based on modifications inspired from loop quantum gravity (LQG), spherically symmetric models have recently been explored to understand the resolution of classical singularities and the fate of the spacetime beyond. While such phenomenological studie
Externí odkaz:
http://arxiv.org/abs/2308.10953
We generalize the existing works on the way (generalized) LTB models can be embedded into polymerized spherically symmetric models in several aspects. We re-examine such an embedding at the classical level and show that a suitable LTB condition can o
Externí odkaz:
http://arxiv.org/abs/2308.10949
We consider a reduced phase space quantisation of a model with $T^3$ Gowdy symmetry in which gravity has been coupled to Gaussian dust. We complete the quantisation programme in reduced loop quantum gravity (LQG) as well as algebraic quantum gravity
Externí odkaz:
http://arxiv.org/abs/2305.16237
Autor:
Thiemann, Thomas, Giesel, Kristina
This chapter focuses on the status of the implementation of the dynamics in the canonical version of Loop Quantum Gravity (LQG). Concretely this means to provide a mathematical meaning of the quantum Einstein equations, sometimes called Wheeler-DeWit
Externí odkaz:
http://arxiv.org/abs/2303.18172
Autor:
Giesel, Kristina, Liu, Hongguang
Publikováno v:
Universe 2023, 9(4), 176
We consider an extended phase space formulation for cosmological and spherically symmetric models in which the choice of a given $\overline{\mu}$-scheme can be implemented dynamically. These models are constructed in the context of the relational for
Externí odkaz:
http://arxiv.org/abs/2303.18111