2024 : 5 : 29

Jafar Sadeghi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address:
Phone: 9111125092

Research

Title
The correlation of WGC and hydrodynamics bound with R4 correction in the charged AdSd+2 black brane
Type
JournalPaper
Keywords
WGCو hydrodynamics وR4 correctionو charged AdSd+2 black brane
Year
2022
Journal NUCLEAR PHYSICS B
DOI
Researchers elaheh naghd mezerji ، Jafar Sadeghi

Abstract

This paper focuses on the possible correlation between conjectures KSS bound and weak gravity conjecture (WGC). The hydrodynamic values KSS bound and weak gravity conjecture constraint the low-energy effective field theory. These conjectures identify UV complete theories. We give four, six, and eight order derivative corrections to the corresponding action and employ the hyperscaling violating charged AdSd+2 black brane solution. These corrections lead us to find a correlation between conjectures KSS bound and weak gravity conjecture. We see that, with increasing perturbation correction, this correlation is more likely to appear. We consider dynamical constant z = 1, d = 5 and obtain the range of hyperscaling violation exponent d +z−2 ≤ θ ≤ d +z−1 for the above mentioned black brane. Here, we show that higher derivative corrections reduce the ratio of M Q to extremal black holes. Likewise, we also obtain the universal relaxation bound τ ≥ 1 πT and KSS bound η s ≥ 1 4π for our model. The results indicate a possibility of a relationship between the two conjectures. Our studies also show the consistency of WGC and KSS bound conjectures for all corrections (except curvature-cubed, β2) in the extremal and near-extremal conditions.