Journal article
Noether Identities and Gauge-Fixing the Action for Cosmological Perturbations
- Abstract:
- We propose and develop a general algorithm for finding the action for cosmological perturbations which rivals the conventional, gauge-invariant approach and can be applied to theories with more than one metric. We then apply it to a particular case of bigravity, focusing on the Eddington- inspired Born-Infeld theory, and show that we can obtain a nearly scale-invariant power spectrum for both scalar and tensor primordial quantum perturbations. Unfortunately, in the case of the minimal Eddington-inspired Born-Infeld theory, we find that the tensor-to-scalar ratio of perturbations is unacceptably large. We discuss the applicability of our general method and the possibility of resurrecting the specific theory we have looked at.
- Publication status:
- Published
Actions
Access Document
- Publisher copy:
- 10.1103/PhysRevD.89.024034
Authors
- Journal:
- Phys.Rev.D More from this journal
- Volume:
- 89
- Issue:
- 2
- Pages:
- 024034
- Publication date:
- 2013-11-15
- DOI:
- EISSN:
-
1550-2368
- ISSN:
-
1550-7998
- Keywords:
- Pubs id:
-
pubs:445604
- UUID:
-
uuid:18946cc8-c91f-4b99-8d94-b01c3b5d3cc9
- Local pid:
-
pubs:445604
- Source identifiers:
-
445604
- Deposit date:
-
2014-05-12
- ARK identifier:
Terms of use
- Copyright date:
- 2013
- Notes:
- 11 pages, 1 figure
If you are the owner of this record, you can report an update to it here: Report update to this record