594 citations · 3.1k across the 88 of their papers we have counts for
4 papers · 1 filter
A curious variant of Bronnikov-Ellis spacetime
Sayan Kar
We explore a curious but simple variant of the Bronnikov-Ellis (BE) wormhole spacetime with a specific `red-shift function' (i.e. ) in the line element. The matter required…
Perturbations of giant magnons and single spikes in
Soumya Bhattacharya, Sayan Kar, Kamal L. Panigrahi
Perturbations of giant magnons and single spikes in a dimensional background spacetime are analysed. Using the form of the giant magnon solution in the…
A wormhole geometry from gravitational collapse
Soumya Chakrabarti, Sayan Kar
We discuss a proposal on how gravitational collapse of a NEC (Null Energy Condition) violating spherically symmetric fluid distribution can avoid the formation of a zero proper vol…
Analog Raychaudhuri equation in mechanics
Rajendra Prasad Bhatt, Anushree Roy, Sayan Kar
Usually, in mechanics, we obtain the trajectory of a particle in a given force field by solving Newton's second law with chosen initial conditions. In contrast, through our work he…