594 citations · 3.1k across the 88 of their papers we have counts for
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hep-th2016★ 6 cited
Perturbations of spiky strings in flat spacetimes
Soumya Bhattacharya, Sayan Kar, Kamal L. Panigrahi
Perturbations of a class of semiclassical strings known today as spiky strings, are studied using the well-known Jacobi equations for small normal deformations of an embedded timel…
gr-qc2016★ 21 cited
Born-Infeld cosmology with scalar Born-Infeld matter
Soumya Jana, Sayan Kar
Cosmology in Eddington-inspired Born-Infeld gravity is investigated using a scalar Born-Infeld field (e.g. tachyon condensate) as matter. In this way, both in the gravity and matte…
gr-qc2016★ 96 cited
Wormholes, the weak energy condition, and scalar-tensor gravity
Rajibul Shaikh, Sayan Kar
We obtain a large class of Lorentzian wormhole spacetimes in scalar-tensor gravity, for which the matter stress energy does satisfy the weak energy condition. Our constructions hav…