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 …

[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 …

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 …

Multi-field cold and warm inflation and the de Sitter swampland conjectures

O Bertolami, PM Sa - Journal of Cosmology and Astroparticle …, 2022 - iopscience.iop.org
We discuss under which conditions multi-field cold and warm inflationary models with
canonical kinetic energy terms are compatible with the swampland conjectures about 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 …

Notes on further refining de Sitter swampland conjecture with inflationary models

J Sadeghi, SN Gashti, MR Alipour - Chinese Journal of Physics, 2022 - Elsevier
In this paper, we challenge some inflationary models with the recent new conjecture of the
swampland program, namely, further refining the de Sitter swampland conjecture. So far …

Further refining swampland dS conjecture in mimetic gravity

S Noori Gashti, J Sadeghi, MR Alipour - International Journal of …, 2023 - World Scientific
Mimetic gravity analysis has been studied as a theory in various types of general relativity
extensions, such as mimetic f (R) gravity, mimetic f (R, T) gravity, mimetic f (R, G) gravity, etc …

Weak gravity conjecture, black branes and violations of universal thermodynamics relation

J Sadeghi, B Pourhassan, SN Gashti, S Upadhyay - Annals of Physics, 2022 - Elsevier
The universal thermodynamic relations between corrections to entropy and extremality for
various black hole solutions, like rotating-AdS black holes, charged black holes, rotating …