# Stable non-BPS D-branes of type I

@article{Frau2000StableND, title={Stable non-BPS D-branes of type I}, author={Marialuisa Frau and Laurent Gallot and Alberto Lerda and P. Strigazzi}, journal={arXiv: High Energy Physics - Theory}, year={2000} }

We review the boundary state description of the non-BPS D-branes in the type I string theory and show that the only stable configurations are the D-particle and the D-instanton. We also compute the gauge and gravitational interactions of the non-BPS D-particles and compare them with the interactions of the dual non-BPS particles of the heterotic string finding complete agreement. In this way we provide further dynamical evidence of the heterotic/type I duality.

## 8 Citations

### Tachyon condensation in unstable type I D-brane systems

- Mathematics
- 2000

Type-I string theory provides eight classes of unstable D-brane systems. We determine the gauge group and tachyon spectrum for each one, and thereby describe the gauge symmetry breaking pattern in…

### S-duality improved perturbation theory in compactified type I/heterotic string theory

- Mathematics, Physics
- 2014

A bstractWe study the mass of the stable non-BPS state in type I/heterotic string theory compactified on a circle with the help of the interpolation formula between weak and strong coupling results.…

### Exact description of D-branes via tachyon condensation

- Physics, Mathematics
- 2003

We examine the fluctuations around a Dp-brane solution in an unstable D-brane system using boundary states and also boundary string field theory. We show that the fluctuations correctly reproduce the…

### Type IIB orientifolds without untwisted tadpoles, and non-BPS D-branes

- Mathematics
- 2001

We discuss the construction of six- and four-dimensional type-IIB ori- entifoldswithvanishinguntwistedRRtadpoles,butgenericallynon-zerotwistedRR tadpoles. Tadpole cancellation requires the…

### Open-closed correspondence of K-theory and cobordism

- MathematicsJournal of High Energy Physics
- 2022

Abstract
Non-trivial K-theory groups and non-trivial cobordism groups can lead to global symmetries which are conjectured to be absent in quantum gravity. Inspired by open-closed string duality, we…

### S-duality improved superstring perturbation theory

- Physics
- 2013

A bstractStrong-weak coupling duality in string theory allows us to compute physical quantities both at the weak coupling end and at the strong coupling end. Furthermore perturbative string theory…

## References

SHOWING 1-10 OF 31 REFERENCES

### Non-BPS States and Branes in String Theory

- Mathematics
- 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…

### Stable non-BPS states in string theory: a pedagogical review

- Mathematics
- 1999

We present a pedagogical review of the stable non-BPS states in string theory which have recently attracted some attention in the literature. In particular, following the analysis of A. Sen, we…

### TASI Lectures on Non-BPS D-Brane Systems

- Mathematics
- 1999

In this set of lectures various properties of D-branes are discussed. After re-viewing the basics, we discuss unstable D-brane/anti-D-brane systems, a subject pioneered by Sen. Following him, we…

### D-Sphalerons and the Topology of String Configuration Space

- Mathematics, Physics
- 2000

We show that unstable D-branes play the role of ``D-sphalerons'' in string theory. Their existence implies that the configuration space of Type II string theory has a complicated homotopy structure,…

### Perturbative Quantum Field Theory

- Physics
- 2000

This talk introduces perturbative quantum field on a heuristic level. It is directed at an audience familiar with elements of quantum mechanics, but not necessarily with high energy physics. It…

### Nucl

- Phys. B 564
- 2000

### TASI lectures on D - branes , hep - th / 9611050 . [ 2 ] P . Di Vecchia and A . Liccardo , D branes in string theories , I , hep - th / 9912161 ; D branes in string theories , II , hep - th / 9912275

- Dirichlet Branes on Orbifolds , hep - th / 9910109 . [ 15 ] A . Sagnotti in Non - Perturbative Quantum Field Theory

### D branes in string theories, I, hep-th/9912161; D branes in string theories, II

- D branes in string theories, I, hep-th/9912161; D branes in string theories, II