197 citations · 467 across the 18 of their papers we have counts for
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gr-qc2019
Revisiting a family of wormholes: geometry, matter, scalar quasinormal modes and echoes
Poulami Dutta Roy, S. Aneesh, Sayan Kar
We revisit a family of ultra-static Lorentzian wormholes which includes Ellis-Bronnikov spacetime as a special case. We first show how the required total matter stress energy (whic…
gr-qc2019
Quasi-normal modes in a symmetric triangular barrier
Poulami Dutta Roy, Jagannath Das, Sayan Kar
Quasi-normal modes (QNMs) of the massless scalar wave in dimensions are obtained for a symmetric, finite, triangular barrier potential. This problem is exactly solvable, with…
gr-qc2019
Geodesic congruences in exact plane wave spacetimes and the memory effect
Indranil Chakraborty, Sayan Kar
Displacement and velocity memory effects in the exact, vacuum, plane gravitational wave line element have been studied recently by looking at the behaviour of pairs of geodesics or…