Supersymmetric fluxbrane intersections and closed string tachyons

Abstract

We consider NS-NS superstring model with several ``magnetic'' parameters $b_s$ (s=1, ...,N) associated with twists mixing a compact $S^1$ direction with angles in $N$ spatial 2-planes of flat 10-dimensional space. It generalizes the Kaluza-Klein Melvin model which has single parameter $b$. The corresponding U-dual background is a R-R type IIA solution describing an orthogonal intersection of $N$ flux 7-branes. Like the Melvin model, the NS-NS string model with $N$ continuous parameters is explicitly solvable; we present its perturbative spectrum and torus partition function explicitly for the N=2 case. For generic $b_s$ (above some critical values) there are tachyons in the $S^1$ winding sector. A remarkable feature of this model is that while in the Melvin N=1 case all supersymmetry is broken, a fraction of it may be preserved for $N>1$ by making a special choice of the parameters $b_s$. Such solvable NS-NS models may be viewed as continuous-parameter analogs of non-compact orbifold models. They and their U-dual R-R fluxbrane counterparts may have some ``phenomenological'' applications. In particular, in N=3 case one finds a special 1/4 supersymmetric R-R 3-brane background. Putting Dp-branes in flat twisted NS-NS backgrounds leads to world-volume gauge theories with reduced amount of supersymmetry. We also discuss possible ways of evolution of unstable backgrounds towards stable ones.

26 pages, harvmac. v3: reference added, minor changes in appendix

Cited by in corpus (33)

• On solvable models of type IIB superstring in NS-NS and R-R plane wave backgrounds
• AdS Bubbles, Entropy and Closed String Tachyons
• Time Evolution in Open String Theory
• Gauge-string duality for (non)supersymmetric deformations of N=4 Super Yang-Mills theory
• (Twisted) Toroidal Compactification of pp-Waves
• Closed String Tachyon Condensation on Twisted Circles
• String theory of the Omega deformation
• The Omega Deformation From String and M-Theory
• Penrose Limits, Deformed pp-Waves and the String Duals of N=1 Large n Gauge Theory
• String Theory in Beta Deformed Spacetimes
• Open Strings in Exactly Solvable Model of Curved Spacetime and PP-Wave Limit
• Quotients of AdS_{p+1} x S^q: causally well-behaved spaces and black holes
• General Omega Deformations from Closed String Backgrounds
• On the quantum stability of IIB orbifolds and orientifolds with Scherk-Schwarz SUSY breaking
• Charged Tachyons and Gauge Symmetry Breaking
• String spectrum of curved string backgrounds obtained by T-duality and shifts of polar angles
• Closed String Tachyons and Their Implications for Non-Supersymmetric Strings
• M-theory lift of brane-antibrane systems and localised closed string tachyons
• On Supergravity Solutions of Branes in Melvin Universes
• Chiral rings and GSO projection in Orbifolds
• From UV/IR mixing to closed strings
• On flux integrals for generalized Melvin solution related to simple finite-dimensional Lie algebra
• On generalized Melvin solution for the Lie algebra $E_6$
• On generalized Melvin solutions for Lie algebras of rank 3
• Strong Magnetic Limit of String Theory
• Decay Modes of Intersecting Fluxbranes
• Strings and D-branes in a supersymmetric magnetic flux background
• The String Geometry Behind Topological Amplitudes
• D branes in background fluxes and Nielsen-Olesen instabilities
• F0 fluxbranes, F-walls and new brane worlds
• Probes in fluxbranes and supersymmetry breaking through Hodge-duality
• On fluxbrane polynomials for generalized Melvin-like solutions associated with rank 5 Lie algebras
• Fluxbrane polynomials and Melvin-like solutions for simple Lie algebras