A. Sen

Publications350
h-index83
Citations24,225
Highly Influential Citations1,650
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F-theory and orientifolds
Universality of the tachyon potential
  • A. Sen
  • Physics
  • 16 November 1999
Using string field theory, we argue that the tachyon potential on a D-brane in bosonic string theory in arbitrary background has a universal form, independent of the boundary conformal field theory…
Non-BPS States and Branes in String Theory
  • A. Sen
  • Mathematics
  • 29 April 1999
We review the recent developments in our understanding of non-BPS states and branes in string theory. The topics include 1) construction of unstable non-BPS D-branes in type IIA and type IIB string…
Black hole entropy function and the attractor mechanism in higher derivative gravity
  • A. Sen
  • Computer Science
  • 21 June 2005
TLDR
The entropy of the black hole is given by the value of the entropy function at this extremum, and the values of the scalar fields at the horizon as well as the sizes of AdS2 and SD?2 are determined by extremizing this entropy function with respect to the corresponding parameters.
Classical solutions in string field theory around the tachyon vacuum
In a previous paper [hep-th/0012251] we proposed a simple class of actions for string field theory around the tachyon vacuum. In this paper we search for classical solutions describing D-branes of…
Tachyon Dynamics in Open String Theory
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 string theoretic methods…
Tachyon Matter
It is shown that classical decay of unstable D-branes in bosonic and superstring theories produces pressureless gas with non-zero energy density. The energy density is stored in the open string…
Tachyon condensation on the brane antibrane system
A coincident D-brane - anti-D-brane pair has a tachyonic mode. We present an argument showing that at the classical minimum of the tachyonic potential the negative energy density associated with the…
Orientifold limit of F -theory vacua
  • A. Sen
  • Mathematics
  • 24 February 1997
We show how an F theory compactified on a Calabi-Yau (n+1)-fold in an appropriate weak coupling limit reduces formally to an orientifold of type IIB theory compactified on an auxiliary complex…
Stable non-BPS bound states of BPS D-branes
S-duality symmetry of type IIB string theory predicts the existence of a stable non-BPS state on an orbifold five plane of the type IIB theory if the orbifold group is generated by the simultaneous…
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