In this paper we study two classes of symmetric D-branes in the Nappi–Witten gravitational
wave, namely D2-and S1-branes. We solve the sewing constraints and determine the bulk …

We compute string amplitudes on pp-waves supported by NS-NS 3-form fluxes and arising
in the Penrose limit of AdS 3× S 3× Script M. We clarify the role of the non-chiral accidental …

We find out a PP-wave spacetime with constant Neveu–Schwarz (NS) three form flux by
taking a Penrose limit on the (1+ 1)-dimensional intersection of two orthogonal stacks of …

We investigate D-branes in the Nappi–Witten model. Classically symmetric D-branes are
classified by the (twisted) conjugacy classes of the Nappi–Witten group, which specify the …

By using the Dirac-Born-Infeld action we study the dynamics of D p-brane propagating in the
NS5-near-horizon plane wave background. We study systematically D-brane embedding in …

We present supergravity solution for F-string in pp-wave background obtained from with zero
flat direction. The classical solution is shown to break all space-time supersymmetries. We …

We present supergravity solution for F-string in pp-wave background obtained from AdS 4×
𝒞 𝒫 3 with zero flat direction. The classical solution is shown to break all space–time …

Password based authentication schemes have been widely used to verify the legitimacy of a
user over an insecure communication channel. A common feature among most of the …

We present a class of supersymmetric Godel solutions in string theory from the non-standard
intersection of branes in supergravities. Such solutions are obtained by applying a T-duality …