25 citations · 97 across the 12 of their papers we have counts for
12 papers
Study of exponential wormhole metric in gravity
Partha Pratim Nath, Debojit Sarma
In this work, we have studied an "exponential form" of spacetime metric: \begin{equation*} ds^2 = -e^{-\frac{2m}{r}}dt^2 +e^{\frac{2m}{r}}dr^2 + e^{\frac{2m}{r}}[r^2 dθ^2 + r^2 \si…
A new class of traversable exponential wormhole metrics
Partha Pratim Nath, Debojit Sarma
In this work we have formulated a new class of traversable exponential wormhole metrics. Here initially we have considered a exponential wormhole metric in which the temporal compo…
Axial symmetry cosmological constant vacuum solution of field equations with a curvature singularity, closed time-like curves and deviation of geodesics
Faizuddin Ahmed, Bidyut Bikash Hazarika, Debojit Sarma
In this paper, we present a type D, non-vanishing cosmological constant, vacuum solution of the Einstein's field equations, extension of an axially symmetric, asymptotically flat v…
Axially symmetric, asymptotically flat vacuum metric with a naked singularity and closed timelike curves
Debojit Sarma, Faizuddin Ahmed, Mahadev Patgiri
We present an axially symmetric, asymptotically flat empty space solution of the Einstein field equations containing a naked singularity. The spacetime is regular everywhere except…
Cylindrical symmetry locally isometric spacetime
Faizuddin Ahmed, Davood Momeni, Debojit Sarma +2
We present a maximally symmetric vacuum spacetime, which is locally isometric anti- de Sitter, admitting closed timelike curves appear after a definite instant of time i.e., a time…
Causality violation in plane wave spacetimes
Debojit Sarma, Mahadev Patgiri, Faiz Uddin Ahmed
It is widely held that plane wave spacetimes are causally well behaved which means that they are free from causal pathologies such as closed timelike curves or closed null geodesic…