Zobrazeno 1 - 10
of 3 868
pro vyhledávání: '"Moradpour, A."'
This study examines the possibility of starting the process of collapsing and forming stars from a fractional molecular cloud. Although the Verlinde's approach is employed to derive the corresponding gravitational potential, the results are easily ge
Externí odkaz:
http://arxiv.org/abs/2409.12869
A solitonic model of the early universe is introduced by employing the Double-Sine-Gordon (DSG) potential. The model predicts the appropriate number of e-foldings ($N_e$) required for favored inflation and is an advantage for the model in addressing
Externí odkaz:
http://arxiv.org/abs/2409.04210
Publikováno v:
Class. Quantum Grav. 41 165006 (2024)
We propose that the spectrum of the surface area of the apparent horizon (AH) of de Sitter (dS) spacetime leads to corrected temperature and entropy of the dS spacetime, offering new insights into its thermodynamic properties. This is done by employi
Externí odkaz:
http://arxiv.org/abs/2405.12314
From a fractal perspective, the entropy bound of gravitational systems undergoes changes. Furthermore, in the cosmological setting, the conservation law of a perfect fluid is also altered in such systems, affecting spatial elements like volume, area,
Externí odkaz:
http://arxiv.org/abs/2404.06986
Publikováno v:
Eur. Phys. J. Plus 139, 148 (2024)
In the present work we study collapse process of a homogeneous and isotropic fluid in Brans-Dicke ({BD}) theory with non-vanishing spacetime torsion. In this theory, torsion can be generated by the {BD} scalar field as well as the intrinsic angular m
Externí odkaz:
http://arxiv.org/abs/2402.08040
Publikováno v:
Phys. Dark Univ. 42 (2023) 101320
In Ref. [S. Jalalzadeh, Phys. Lett. B 829 (2022) 137058], Jalalzadeh established that the thermodynamical entropy of a quantum-deformed black hole with horizon area $A$ can be written as $S_q=\pi\sin\left(\frac{A}{8G\mathcal N} \right)/\sin\left(\fra
Externí odkaz:
http://arxiv.org/abs/2308.12089
Publikováno v:
Serb. Astron. J. 207 (2023), 1 - 7
Listening to echoes has long been a way to estimate distances, a technique whose backbone is the time delay. The gravitational field also creates a time delay, called Shapiro time delay, that helps us extract some information from the field and is in
Externí odkaz:
http://arxiv.org/abs/2308.03799
Autor:
Anne-Laure Leblond, Birgit Helmchen, Maliki Ankavay, Daniela Lenggenhager, Jasna Jetzer, Fritjof Helmchen, Hueseyin Yurtsever, Rossella Parrotta, Marc E. Healy, Amiskwia Pöschel, Enni Markkanen, Nasser Semmo, Martin Ferrié, Laurence Cocquerel, Harald Seeger, Helmut Hopfer, Beat Müllhaupt, Jérôme Gouttenoire, Darius Moradpour, Ariana Gaspert, Achim Weber
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-12 (2024)
Abstract Hepatitis E virus (HEV) infection, one of the most common forms of hepatitis worldwide, is often associated with extrahepatic, particularly renal, manifestations. However, the underlying mechanisms are incompletely understood. Here, we repor
Externí odkaz:
https://doaj.org/article/2e0acd6efb7748d6ab4fa79b0d50a92c
This study delves into the validity of quantum mechanical operators in the context of quantum gravity, recognizing the potential need for their generalization. A primary objective is to investigate the repercussions of these generalizations on the in
Externí odkaz:
http://arxiv.org/abs/2307.13006
Publikováno v:
Eur. Phys. J. Plus (2024) 139:170
Is thermodynamics consistent with the quantum gravity reconciliation hypothesis [A. G. Cohen et al. Phys. Rev. Lett. 82, 4971 (1999)], which establishes holographic dark energy models? Here, we have attempted to address this issue in the affirmative
Externí odkaz:
http://arxiv.org/abs/2304.06494