Abstract
We study the role of rolling tachyons in the cosmological model with dilatonic gravity. In the string frame, flat space solutions of both initial-stage and late-time are obtained in closed form. In the Einstein frame, we show that every expanding solution is decelerating.
| Original language | English |
|---|---|
| Pages (from-to) | 111-118 |
| Number of pages | 8 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 552 |
| Issue number | 3-4 |
| DOIs | |
| State | Published - 23 Jan 2003 |
Bibliographical note
Funding Information:We would like to thank Nakwoo Kim and Jung Tay Yee for discussions on D-brane systems. H.B. Kim and Y. Kim would like to acknowledge the hospitality of Korea Institute for Advanced Study where a part of this work has been done. This work was supported by Korea Research Foundation Grant KRF-2002-070-C00025 (C.K.) and the Swiss Science Foundation, grant 21-58947.99 (H.B.K.), and is the result of research activities (Astrophysical Research Center for the Structure and Evolution of the Cosmos (ARCSEC) and the Basic Research Program, R01-2000-000-00021-0) supported by Korea Science Engineering Foundation (Y.K.).
Keywords
- Dilaton
- Rolling tachyon
- String cosmology