Zobrazeno 1 - 10
of 884
pro vyhledávání: '"minisuperspace models"'
Publikováno v:
Phys.Rev.D 106 (2022) 6, 064013
We investigate the phase space symmetries and conserved charges of homogeneous gravitational minisuperspaces. These (0+1)-dimensional reductions of general relativity are defined by spacetime metrics in which the dynamical variables depend only on a
Externí odkaz:
http://arxiv.org/abs/2205.02615
Autor:
Eder, Konstantin, Sahlmann, Hanno
Publikováno v:
J. High Energ. Phys. 2021, 64 (2021)
In this paper, we study a class of symmetry reduced models of $\mathcal{N}=1$ supergravity using self-dual variables. It is based on a particular Ansatz for the gravitino field as proposed by D'Eath et al. We show that the essential part of the const
Externí odkaz:
http://arxiv.org/abs/2010.15629
Publikováno v:
Eur. Phys. J. C (2018) 78: 786
The homogeneous cosmological models with a Liouville scalar field are investigated in classical and quantum context of Wheeler-DeWitt geometrodynamics. In the quantum case of quintessence field with potential unbounded from below and phantom field, t
Externí odkaz:
http://arxiv.org/abs/1802.06720
Autor:
Baytaş, Bekir, Bojowald, Martin
Publikováno v:
Phys. Rev. D 95, 086007 (2017)
A discrete quantum spin system is presented in which several modern methods of canonical quantum gravity can be tested with promising results. In particular, features of interacting dynamics are analyzed with an emphasis on homogeneous configurations
Externí odkaz:
http://arxiv.org/abs/1611.06255
Autor:
Bojowald, Martin, Brahma, Suddhasattwa
Publikováno v:
Phys. Rev. D 93, 125001 (2016)
A direct correspondence of quantum mechanics as a minisuperspace model for a self-interacting scalar quantum-field theory is established by computing, in several models, the infrared contributions to 1-loop effective potentials of Coleman--Weinberg t
Externí odkaz:
http://arxiv.org/abs/1509.00640
Autor:
Upadhyay, Sudhaker, Paul, Biswajit
Publikováno v:
Eur. Phys. J. C (2016) 76:394
The Einstein-Hilbert action in the context of Higher derivative theories is considered for finding out their BRST symmetries. Being a constraint system, the model is transformed in the minisuperspace language with the FRLW background and the gauge sy
Externí odkaz:
http://arxiv.org/abs/1506.05258
Autor:
K. Eder, H. Sahlmann
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-46 (2021)
Abstract In this paper, we study a class of symmetry reduced models of N $$ \mathcal{N} $$ = 1 super- gravity using self-dual variables. It is based on a particular Ansatz for the gravitino field as proposed by D’Eath et al. We show that the essent
Externí odkaz:
https://doaj.org/article/bc52e60e57564b158022ea38e4273201
Autor:
Grigorian, Sergey
Publikováno v:
Class.Quant.Grav.24:4881-4913,2007
We derive the full canonical formulation of the bosonic sector of 11-dimensional supergravity, and explicitly present the constraint algebra. We then compactify M-theory on a warped product of homogeneous spaces of constant curvature, and construct a
Externí odkaz:
http://arxiv.org/abs/hep-th/0612153
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Anastopoulos, Charis, Savvidou, Ntina
Publikováno v:
Class.Quant.Grav. 22 (2005) 1841-1866
We study the Robertson-Walker minisuperspace model in histories theory, motivated by the results that emerged from the histories approach to general relativity. We examine, in particular, the issue of time-reparameterisation in such systems. The mode
Externí odkaz:
http://arxiv.org/abs/gr-qc/0410131