124 citations · 418 across the 27 of their papers we have counts for
28 papers
Quintessence-dominated cyclic universe with negative cosmological constant
Nasr Ahmed, Kazuharu Bamba
We investigate two simplified non-singular cyclic models with a negative time-varying cosmological constant to represent the non-conventional mechanism of negative cosmological con…
Logamediate inflation on the Swiss-cheese brane with varying cosmological constant
Nasr Ahmed, Anirudh Pradhan
The existence of Schwarzchild black holes in the structure of Swiss-cheese brane-world led to the conclusion that this specific brane-world scenario is more realistic than the FLRW…
Investigating the hyperbolic and hybrid scalar field cosmologies with varying cosmological constant in gravity
Nasr Ahmed, Tarek M. Kamel
This paper investigated two scalar field cosmological models in gravity with cosmic transit and varying cosmological constant .The cosmological constant tends to hav…
Big rip in Swiss-cheese Brane-worlds with cosmic transit
Nasr Ahmed, M. Fekry, Tarek M. Kamel
We study the big rip scienario in Swiss-cheese Brane-worlds. The results obtained have been found to be independent of the value of the cosmological constant whether its positi…
Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in gravity
Vinod Kumar Bhardwaj, Anirudh Pradhan, Nasr Ahmed +1
Modeling of matter bounce in gravity has been presented with no violation of the null energy condition. Only a closed universe with negative pressure is allowed in good ag…
Some cosmological features of 4D Gauss-Bonnet gravity with varying cosmological constant
Nasr Ahmed, Ajab A. Alfreedi, Alaa A. Alzulaibani
We explore some cosmological features of the newly suggested 4D Gauss-Bonnet gravity through two different models assuming a varying cosmological constant. Observational constraint…