Abstract
We study a mechanism to produce the circular polarization of primordial gravitational waves. The circular polarization is generated during the super-inflation driven by the Gauss-Bonnet term in the string-inspired cosmology. The instability in the tensor mode caused by the Gauss-Bonnet term and the parity violation due to the gravitational Chern-Simons term are the essential ingredients of the mechanism. This circularly polarized signal may be an interesting target for observations to verify the superstring theory.
| Original language | English |
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| Pages | 208-211 |
| Number of pages | 4 |
| Publication status | Published - 2007 |
| Externally published | Yes |
| Event | 17th Workshop on General Relativity and Gravitation in Japan, JGRG 2007 - Nagoya, Japan Duration: Dec 3 2007 → Dec 7 2007 |
Other
| Other | 17th Workshop on General Relativity and Gravitation in Japan, JGRG 2007 |
|---|---|
| Country/Territory | Japan |
| City | Nagoya |
| Period | 12/3/07 → 12/7/07 |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics