Evolution of D - branes Under Closed String Tachyon Condensation
نویسنده
چکیده
We study the evolution of stable D-branes of C/Zn and twisted circle theories in the process of closed string tachyon condensation. We interpret the fractional branes in these backgrounds as type II branes wrapping (‘blown up’) cycles, and trace the evolution of the corresponding cycles under tachyon condensation. We also study RG flows of the corresponding N = 2 boundary conformal field theories. We find flows along which fractional D-branes either disappear or evolve into other fractional D-branes, and other flows along which bulk branes either disappear or evolve into stable branes.
منابع مشابه
Nothing for Branes
Recent work on closed string tachyon condensation suggests the existence of a ‘nothing state’ where closed strings and space itself vanish. We consider the evolution of D-branes in such backgrounds, focusing on the early stages of the condensation process. We find evidence that the branes exist in the region; although, generically their apparent mass grows exponentially with time. However, ther...
متن کاملDon’t Panic! Closed String Tachyons in ALE Spacetimes
We consider closed string tachyons localized at the fixed points of noncompact non-supersymmetric orbifolds. We argue that tachyon condensation drives these orbifolds to flat space or supersymmetric ALE spaces. The decay proceeds via an expanding shell of dilaton gradients and curvature which interpolates between two regions of distinct angular geometry. The string coupling remains weak through...
متن کاملOn Condensation of Closed-string Tachyons
An F-theory dual of a nonsupersymmetric orientifold is considered. It is argued that the condensation of both open and closed string tachyons in the orientifold corresponds to the annihilation of branes and anti-branes in the F-theory dual. The end-point of tachyon condensation is thus expected to be the vacuum of Type-IIB superstring. Some speculations are presented about the F-theory dual of ...
متن کاملSupergravity description of non-Bogomol’nyi-Prasad-Sommerfield branes
While a brane breaks half of the space-time supersymmetry, the antibrane breaks precisely the other half of the supersymmetry. Thus, a system of a brane and anti-brane breaks together all the space-time supersymmetry. The system is not stable, however, since the brane and anti-brane attract each other. This can be understood as the appearance of a tachyon on the world-volume of the branes. It a...
متن کاملLectures on D - branes , tachyon condensation , and string field theory
These lectures provide an introduction to the subject of tachyon condensation in the open bosonic string. The problem of tachyon condensation is first described in the context of the low-energy Yang-Mills description of a system of multiple D-branes, and then using the language of string field theory. An introduction is given to Witten's cubic open bosonic string field theory. The Sen conjectur...
متن کامل