The light-like linear dilaton background represents a particularly simple time-dependent 1/2
BPS solution of critical type-IIA superstring theory in ten dimensions. Its lift to M-theory, as …

We study D-branes in a two-dimensional lorentzian orbifold Bbb R 1, 1/Γ with a discrete
boost Γ. This space is known as Misner or Milne space, and includes big crunch/big bang …

A bstract The U (1) gauge dynamics on a D 4-brane is revisited, with a two form, to construct
an effective curvature theory in a second order formalism. We exploit the local degrees in a …

We investigate closed string tachyon condensation in Misner space, a toy model for big
bang universe. In Misner space, we are able to condense tachyonic modes of closed strings …

The light-like linear dilaton background presents a simple time dependent solution of type II
supergravity equations of motion that preserves 1/2 supersymmetry in ten dimensions. We …

We investigate the black hole-string transition in the two-dimensional Lorentzian black hole
system from the exact boundary states that describe the rolling D-brane falling down into the …

Big_Bang (BB) is one of successful theoretical models with ample high-tech-precise-
experimental evidence explaining the origin and present form of the universe while …

We study the anti-de Sitter D-brane dynamics in hamiltonian formulation. By exploiting the
existence of certain conserved charges, we solve the equation of motion for a D1-brane in …

We consider string theory on the Lorentzian Melvin geometry, which is obtained by
analytically continuing the two-parameter Euclidean Melvin background. Because this …

Unstable D-branes are central objects in string theory, and exist also in time-dependent
backgrounds. In this paper we take first steps to studying brane decay in space-time …