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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  kyouindb  KAKEN_id
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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