We give a comprehensive review of recent developments on using the pure spinor
formalism to compute massless superstring scattering amplitudes at tree level. The main …

We review the status and present range of applications of the “string-inspired” approach to
perturbative quantum field theory. This formalism offers the possibility of computing effective …

We discuss construction of classical time dependent solutions in open string (field) theory,
describing the motion of the tachyon on unstable D-branes. Despite the fact that the string …

We propose a field theory for describing the tachyon on a brane–antibrane system near the
minimum of the potential. This field theory realizes two known properties of the tachyon …

In this review we describe our current understanding of the properties of open string
tachyons on an unstable D-brane or brane–antibrane system in string theory. The various …

A bstract We demonstrate the validity of the String Lamppost Principle—that all consistent
theories of quantum gravity are in the String Landscape—for supersymmetric theories in d> …

We show how the motion through the extra dimensions of a gas of branes and antibranes
can, under certain circumstances, produce an era of inflation as seen by observers trapped …

As of today, there exist consistent, gauge-invariant string field theories describing all string
theories: bosonic open and closed strings, open superstrings, heterotic strings, and type II …

D-branes have turned out to be a key ingredient in our present understanding of the
structure of string theory. Interestingly, the fact that D-branes contain gauge fields localized …

Modeling the potential by an inverse square law in terms of the tachyon field [V (T)= β T− 2]
we find an exact solution for a spatially flat isotropic universe. We show that for β> 2 3/3 the …