# On Minisuperspace Models of S-branes

@article{Fredenhagen2003OnMM, title={On Minisuperspace Models of S-branes}, author={Stefan Fredenhagen and Volker Schomerus}, journal={Journal of High Energy Physics}, year={2003}, volume={2003}, pages={003-003} }

In this note we reconsider the minisuperspace toy models for rolling and bouncing tachyons. We show that the theories require to choose boundary conditions at infinity since particles in an exponentially unbounded potential fall to infinity in finite world-sheet time. Using standard techniques from operator theory, we determine the possible boundary conditions and we compute the corresponding energy spectra and minisuperspace 3-point functions. Based on this analysis we argue in particular that…

## 51 Citations

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## References

SHOWING 1-10 OF 30 REFERENCES

### Rolling Tachyon

- Physics
- 2002

We discuss construction of classical time dependent solutions in open string (field) theory, describing the motion of the tachyon on unstable D-branes. Despite the fact that the string field theory…

### Rolling tachyons from Liouville theory

- Mathematics
- 2003

In this work we propose an exact solution of the c = 1 Liouville model, i.e. of the world-sheet theory that describes the homogeneous decay of a closed string tachyon. Our expressions are obtained…

### PARTICLE PRODUCTION ON HALF S-BRANE

- Physics
- 2004

In this paper we will study quantum field theory of fluctuation modes around the rolling tachyon solution on non-BPS D-brane effective action. The goal of this paper is to study particle production…

### Time Evolution in Open String Theory

- Physics
- 2002

We discuss a general iterative procedure for constructing time dependent solutions in open string theory describing rolling of a generic tachyon field away from its maximum. These solutions are…

### Liouville field theory on a pseudosphere

- Mathematics
- 2001

Liouville field theory is considered with boundary conditions corresponding to a quantization of the classical Lobachevskiy plane (i.e. euclidean version of $AdS_2$). We solve the bootstrap equations…

### Rolling tachyons and decaying branes

- Physics
- 2003

We present new rolling tachyon solutions describing the classical decay of D- branes. Our methods are simpler than those appearing in recent works, yet our results are exact in classical string…

### Rolling tachyon with electric and magnetic fields: T-duality approach

- Physics
- 2003

We study the decay of unstable D$p$-branes when the world-volume gauge field is turned on. We obtain the relevant Dp-brane boundary state with electric and magnetic fields by boosting and rotating…

### Space - like branes

- Physics
- 2002

Scalar ﬁeld theories with appropriate potentials in Minkowski space can have time-dependent classical solutions containing topological defects which correspond to S-branes - i.e. branes all of whose…

### Correlators in Timelike Bulk Liouville Theory

- Physics
- 2003

Liouville theory with a negative norm boson and no screening charge corresponds to an exact classical solution of closed bosonic string theory describing time-dependent bulk tachyon condensation. A…

### The Schrödinger wave functional and S-branes

- Physics
- 2003

In this paper, we will consider the minisuperspace approach to S-branes dynamics in the Schrodinger picture description. Time evolution of the vacuum wave functional for quantum field theory on a…