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タイトル: | Matter coupling in partially constrained vielbein formulation of massive gravity |
著者: | De Felice, Antonio Gumrukcuoglu, A. Emir Heisenberg, Lavinia Mukohyama, Shinji |
著者名の別形: | 向山, 信治 |
キーワード: | modified gravity gravity cosmological perturbation theory dark energy theory |
発行日: | 4-Jan-2016 |
出版者: | IOP Publishing |
誌名: | Journal of Cosmology and Astroparticle Physics |
巻: | 2016 |
論文番号: | 003 |
抄録: | We consider a linear effective vielbein matter coupling without introducing the Boulware-Deser ghost in ghost-free massive gravity. This is achieved in the partially constrained vielbein formulation. We first introduce the formalism and prove the absence of ghost at all scales. As next we investigate the cosmological application of this coupling in this new formulation. We show that even if the background evolution accords with the metric formulation, the perturbations display important different features in the partially constrained vielbein formulation. We study the cosmological perturbations of the two branches of solutions separately. The tensor perturbations coincide with those in the metric formulation. Concerning the vector and scalar perturbations, the requirement of absence of ghost and gradient instabilities yields slightly different allowed parameter space. |
著作権等: | Article funded by SCOAP. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
URI: | http://hdl.handle.net/2433/216584 |
DOI(出版社版): | 10.1088/1475-7516/2016/01/003 |
出現コレクション: | 学術雑誌掲載論文等 |
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