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Fortschritte der Physik, Volume 74, Issue 4, April 2026.Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley +1 more source
Annalen der Physik, Volume 538, Issue 3, March 2026.Carrollian Reissner‐Nordström black holes are investigated through fermionic tunneling, entropy‐corrected thermodynamics, and plasma‐modified gravitational lensing. The generalized uncertainty principle introduces minimal‐length corrections to the Hawking temperature, while the combined Barrow‐Exponential entropy reveals smooth thermodynamic crossovers
Erdem Sucu, İzzet Sakallı, Yusuf Sucu
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Almost pseudo symmetric Sasakian manifold admitting a type of quarter symmetric metric connection [PDF]
, 2015 summary:In the present paper we have obtained the necessary condition for the existence of almost pseudo symmetric and almost pseudo Ricci symmetric Sasakian manifold admitting a type of quarter symmetric metric ...
Venkatesha, Vishnuvardhana S.V.
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Weakly Ricci symmetric spacetimes
, 2017 The objective of the present paper is to study weakly Ricci symmetric spacetimes. Among others, we prove that a weakly Ricci symmetric spacetime obeying Einstein’s field equation without cosmological constant represents stiff matter.
Avik De, Pradip Majhi
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, 2021 In this paper, we consider conformally symmetric generalized Ricci recurrent manifolds. We prove that such a manifold is a quasi-Einstein manifold and study its geometric properties. Also, we obtain several interesting results.
core
Tangent Bundles of P-Sasakian Manifolds Endowed with a Quarter-Symmetric Metric Connection
, 2023 The purpose of this study is to evaluate the curvature tensor and the Ricci tensor of a P-Sasakian manifold with respect to the quarter-symmetric metric connection on the tangent bundle TM.
Abdul Haseeb +2 more
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ON RICCI SEMI-SYMMETRIC MIXED QUASI-EINSTEIN HERMITIAN MANIFOLD [PDF]
The object of the present paper is to study Bochner Ricci semi-symmetric mixed quasi-Einstein Hermitian manifold and holomorphically projective Ricci semisymmetric mixed quasi-Einstein Hermitian ...
Vasiulla, Mohd, Ali, Mohabbat
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On Weakly Projective Symmetric Manifolds
, 2009 The object of the present paper is to study weakly projective symmetric manifolds and its decomposability with several non-trivial examples. Among others it is shown that in a decomposable weakly projective symmetric manifold both the decompositions are ...
Hui, Shyamal Kumar, Shaikh, A. A.
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Quarter-symmetric metric connection in a P-Sasakian manifold
, 2015 In this paper, we consider a quarter-symmetric metric connection in a P-Sasakian manifold. We investigate the curvature tensor and the Ricci tensor of a P-Sasakian manifold with respect to the quarter-symmetric metric connection.
De Uday Chand, Mandal Krishanu
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On a semi symmetric metric connection with a special condition on a Riemannian manifold [PDF]
, 2011 In this study, we consider a manifold equipped with semi symmetric metric connection whose the torsion tensor satisfies a special condition. We investigate some properties of the Ricci tensor and the curvature tensor of this manifold .
Bağdatlı Yılmaz, Hülya +2 more
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