Chiral anomalous dispersion
The linearized Einstein equation describing graviton propagation through a chiral medium appears to be helicity dependent. We analyze features of the corresponding spectrum in a collision-less regime above a flat background. In the long wave-length limit, circularly polarized metric perturbations tr...
| Main Authors: | , |
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| Other Authors: | |
| Language: | en |
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SPRINGER
2018
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10150/627127 http://arizona.openrepository.com/arizona/handle/10150/627127 |
| Summary: | The linearized Einstein equation describing graviton propagation through a chiral medium appears to be helicity dependent. We analyze features of the corresponding spectrum in a collision-less regime above a flat background. In the long wave-length limit, circularly polarized metric perturbations travel with a helicity dependent group velocity that can turn negative giving rise to a new type of an anomalous dispersion. We further show that this chiral anomalous dispersion is a general feature of polarized modes propagating through chiral plasmas extending our result to the electromagnetic sector. |
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