Swampland conjectures in hybrid metric-Palatini gravity

J Sadeghi, SN Gashti, F Darabi - Physics of the Dark Universe, 2022 - Elsevier
In this paper, we study a hybrid combination of Einstein–Hilbert action with curvature scalar
R, and a function f (R) in Palatini gravity within the context of inflationary scenario, from the …

News from the Swampland—constraining string theory with astrophysics and cosmology

N Schöneberg, L Vacher, JDF Dias… - … of Cosmology and …, 2023 - iopscience.iop.org
Our current best guess for a unified theory of gravitation and quantum field theory (string
theory) generically predicts a set of requirements for a consistently quantized theory, the …

[HTML][HTML] WGC and WCCC of black holes with quintessence and cloud strings in RPS space

MR Alipour, J Sadeghi, M Shokri - Nuclear Physics B, 2023 - Elsevier
In this paper, we first introduce Riesner-Nordstrom AdS (RN-AdS) black hole in presence of
quintessence and cloud of strings. And then we use the Restrict Phase Space (RPS) …

[HTML][HTML] Reissner-Nordström black holes surrounded by perfect fluid dark matter: Testing the viability of weak gravity conjecture and weak cosmic censorship …

J Sadeghi, SN Gashti - Physics Letters B, 2024 - Elsevier
A possible violation of the weak gravity conjecture (WGC) by cosmic censorship is one of the
major challenges in the field of general relativity. The cosmic censorship is a fundamental …

Pleasant behavior of swampland conjectures in the face of specific inflationary models

SN Gashti, J Sadeghi, B Pourhassan - Astroparticle Physics, 2022 - Elsevier
Recently researchers have been studying various conditions as swampland criteria in
cosmological implications. They have studied many inflation models with different …

[HTML][HTML] WGC and WCC for charged black holes with quintessence and cloud of strings

MR Alipour, J Sadeghi, M Shokri - The European Physical Journal C, 2023 - Springer
One of the important problems with the existence of weak gravity conjecture (WGC) is the
violation of the cosmic censorship. Such a cosmic phenomena is important and consistent in …

Weak gravity conjecture from conformal field theory: a challenge from hyperscaling violating and Kerr-Newman-AdS black holes

J Sadeghi, M Shokri, MR Alipour, SN Gashti - Chinese Physics C, 2023 - iopscience.iop.org
We search for a possible relationship between weak gravity conjecture (WGC) and
conformal field theory (CFT) in hyperscaling violating and Kerr-Newman-AdS black holes …

Swampland dS conjecture in mimetic f (R, T) gravity

SN Gashti, J Sadeghi, S Upadhyay… - … in Theoretical Physics, 2022 - iopscience.iop.org
In this paper, we study a theory of gravity called mimetic f (R, T) in the presence of
swampland dS conjecture. For this purpose, we introduce several inflation solutions of the …

de Sitter swampland conjecture in string field inflation

J Sadeghi, B Pourhassan, SN Gashti, I Sakallı… - The European Physical …, 2023 - Springer
In this paper, we study a particular type of inflation by using non-local Friedman equations
that are derived from the zero levels of string field theory and express a tachyonic action …

Refined swampland conjecture in warm vector hybrid inflationary scenario

SN Gashti, J Sadeghi - The European Physical Journal Plus, 2022 - Springer
In this paper, we want to study warm vector inflation from the framework of a hybrid scenario
in the face of refined swampland conjectures. First, we introduce the warm vector inflation …