منابع مشابه
NS Branes in Type I Theory
We consider novel nonperturbative effects of type I theories compactified on singular ALE spaces obtained by adding NS branes. Such effects include a description of small E8 instantons at singularities.
متن کاملProbing Type I′ String Theory Using D0 and D4-Branes
We analyse the velocity-dependent potentials seen by D0 and D4-brane probes moving in Type I background for head-on scattering off the fixed planes. We find that at short distances (compared to string length) the D0-brane probe has a nontrivial moduli space metric, in agreement with the prediction of Type I matrix model; however, at large distances it is modified by massive open strings to a fl...
متن کاملNS Fivebranes in Type 0 String Theory ∗
The massless degrees of freedom of type 0 NS5-branes are derived. A non-chiral, purely bosonic spectrum is found in both type 0A and 0B. This non-chirality is confirmed by a one-loop computation in the bulk. An interpretation of the spectra in terms of “type 0 little strings” is proposed. The type 0B NS5-brane is conjectured to be dual to a bound state of certain D5-branes, which is argued to h...
متن کاملDecay of type 0 NS 5 - branes to nothing
The perturbative vacuum of type 0 string theory is unstable due to the existence of the closed string tachyon. This instability can be removed by S1 compactification with twisted boundary condition for the tachyon field. We show that even in this situation unwrapped NS5branes are unstable and decay to bubbles of nothing smoothly without tunneling any potential barrier. We discuss a relation bet...
متن کاملGeometrical Tachyon Kinks and NS 5 Branes
We further investigate the NS5 ring background using the tachyon map. Mapping the radion fields to the rolling tachyon helps to explain the motion of a probe Dp-brane in this background. It turns out that the radion field becomes tachyonic when the brane is confined to one dimensional motion inside the ring. We find explicit solutions for the geometrical tachyon field that describe stable kink ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)00117-8