Anomaly-induced effective action and Chern-Simons modification of general relativity
Recently it was shown that the quantum vacuum effects of massless chiral fermion field in curved space-time leads to the parity-violating Pontryagin density term, which appears in the trace anomaly with imaginary coefficient. In the present work the anomaly-induced effective action with the parity-v...
| Published in: | Physics Letters B Vol. 746. P. 372-378 |
|---|---|
| Main Author: | |
| Corporate Author: | |
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000527798 Перейти в каталог НБ ТГУ |
| Summary: | Recently it was shown that the quantum vacuum effects of massless chiral fermion field in curved space-time leads to the parity-violating Pontryagin density term, which appears in the trace anomaly with imaginary coefficient. In the present work the anomaly-induced effective action with the parity-violating term is derived. The result is similar to the Chern-Simons modified general relativity, which was extensively studied in the last decade, but with the kinetic terms for the scalar different from those considered previously in the literature. The parity-breaking term makes no effect on the zero-order cosmology, but it is expected to be relevant in the black hole solutions and in the cosmological perturbations, especially gravitational waves. |
|---|---|
| Bibliography: | Библиогр.: 54 назв. |
| ISSN: | 0370-2693 |