4 papers
Time dependent supergravity solutions in arbitrary dimensions
Somdatta Bhattacharya, Shibaji Roy
By directly solving the equations of motion we obtain the time dependent solutions of supergravities with dilaton and a -form field-strength in arbitrary dimensions. The metrics…
On the effective action of a space-like brane
Somdatta Bhattacharya, Sudipta Mukherji, Shibaji Roy
Starting from the non-BPS D-brane action we derive an effective action in space dimensions by studying the fluctuations of various bosonic fields around the time-lik…
More on Penrose limits and non-local theories
Somdatta Bhattacharya, S. Roy
We obtain the Penrose limit of six dimensional Non-Commutative Open String (NCOS) theory and show that in the neighborhood of a particular null geodesic it leads to an exactly…
A Short Note On The Wilson-Loop Average And The AdS/CFT Correspondece
Somdatta Bhattacharya
In hep-th/9803002, Maldacena argued that in the light of the AdS/CFT correspondence as formulated by Witten and Gubser, Klebanov and Polyakov as a relation between partition functi…