1 citations · 4 across the 6 of their papers we have counts for
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Complex Geodesics in the Nariai Geometry
Lars Aalsma, Mir Mehedi Faruk
We study two-point correlation functions of heavy scalar fields in the Nariai geometry. Utilizing the heat kernel formalism, we obtain this result from a geodesic approximation to…
Time Dependent String Compactification: Towards Bouncing Cosmology
Mir Mehedi Faruk
We study the Null Energy Condition (NEC) arising from the Virasoro constraint on the string worldsheet. We then analyze how the NEC in the external spacetime directions emerges und…
Quasinormal Modes and the Switchback Effect in Schwarzschild-de Sitter
Mir Mehedi Faruk, Facundo Rost, Jan Pieter van der Schaar
We study the causal structure of Schwarzschild-de Sitter (SdS), including shock wave perturbations, in using reflected null ray trajectories, either through the interior blac…
Deriving the Gibbons-Maldacena-Nunez no-go theorem from the Raychaudhuri equation
Mir Mehedi Faruk
In this article, we point out that to solve the null Raychaudhuri equation for higher dimensional spacetime with accelerating FRW solution in external directions and static compact…
The four-dimensional null energy condition as a swampland conjecture
Heliudson Bernardo, Suddhasattwa Brahma, Keshav Dasgupta +2
We analyze four-dimensional Friedmann-Lemaitre-Robertson-Walker cosmologies in type IIB, arising from a M-theory dual, and find that the null energy condition (NEC) has to be obeye…
de Sitter Space as a Glauber-Sudarshan State
Suddhasattwa Brahma, Keshav Dasgupta, Radu Tatar
Glauber-Sudarshan states, sometimes simply referred to as Glauber states, or alternatively as coherent and squeezed-coherent states, are interesting states in the configuration spa…