Zobrazeno 1 - 10
of 2 197
pro vyhledávání: '"Einstein universe"'
In this paper, the Quantum Brownian motion of a point particle induced by the quantum vacuum fluctuations of a real massless scalar field in Einstein universe under Dirichlet and Neumann boundary conditions is studied. Using the Wightman functions, g
Externí odkaz:
http://arxiv.org/abs/2410.14560
Autor:
Chalumeau, Adam, Galiay, Blandine
The Einstein universe $\mathbf{Ein}^{p,q}$ of signature $(p,q)$ is a pseudo-Riemannian analogue of the conformal sphere; it is the conformal compactification of the pseudo-Riemannian Minkowski space. For $p,q \geq 1$, we show that, up to a conformal
Externí odkaz:
http://arxiv.org/abs/2407.18577
Autor:
Dowker, J. S.
An oldish question is resurrected concerning the significance of the ambiguous `b-type' terms encountered in calculations of the vacuum, Casimir energy on the Einstein Universe for conformally coupled scalar fields. Some remarks in the literature are
Externí odkaz:
http://arxiv.org/abs/2403.03817
In the present paper we investigate thermal fluctuation corrections to the vacuum energy at zero temperature of a conformally coupled massless scalar field whose modes propagate in the Einstein universe with a spherical boundary, characterized by bot
Externí odkaz:
http://arxiv.org/abs/2210.06128
Autor:
Sharif, M., Gul, M. Zeeshan
Publikováno v:
Physica Scripta 96(2021)105001
This paper analyzes the stability of the closed Einstein static universe by using linear homogeneous perturbations in the framework of energy-momentum squared gravity. This newly developed proposal resolves the primordial singularity and yields feasi
Externí odkaz:
http://arxiv.org/abs/2108.08682
Autor:
Sharif, Muhammad1 (AUTHOR) msharif.math@pu.edu.pk, Gul, Muhammad Zeeshan1 (AUTHOR)
Publikováno v:
Universe (2218-1997). Mar2023, Vol. 9 Issue 3, p145. 17p.
Autor:
Sharif, M1 (AUTHOR) msharif.math@pu.edu.pk, Gul, M Zeeshan1 (AUTHOR)
Publikováno v:
Pramana: Journal of Physics. Sep2022, Vol. 96 Issue 3, p1-8. 8p.
Publikováno v:
Phys. Rev. D 101, 043515 (2020)
We show that equations of Newtonian hydrodynamics and gravity with Einstein's cosmological constant included admit gravitostatic wave solutions propagating in the background of Einstein's static Universe. In the zero pressure limit these waves exist
Externí odkaz:
http://arxiv.org/abs/1910.10216
Akademický článek
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Publikováno v:
In Journal of Mathematical Analysis and Applications 15 March 2021 495(2)