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Cited by 310

The DOI matches its Crossref record; 19 of the 19 references it cites were found in a registry or an index.

On the extra mode and inconsistency of Hořava gravity

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Blas, D, Pujolàs, O, Sibiryakov, S·2009·Journal of High Energy Physics
DOI 10.1088/1126-6708/2009/10/029
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Abstract

We address the consistency of Hořava's proposal for a theory of quantum gravity from the low-energy perspective. We uncover the additional scalar degree of freedom arising from the explicit breaking of the general covariance and study its properties. The analysis is performed both in the original formulation of the theory and in the Stuckelberg picture. A peculiarity of the new mode is that it satisfies an equation of motion that is of first order in time derivatives. At linear level the mode is manifest only around spatially inhomogeneous and time-dependent backgrounds. We find two serious problems associated with this mode. First, the mode develops very fast exponential instabilities at short distances. Second, it becomes strongly coupled at an extremely low cutoff scale. We also discuss the ``projectable'' version of Hořava's proposal and argue that this version can be understood as a certain limit of the ghost condensate model. The theory is still problematic since the additional field generically forms caustics and, again, has a very low strong coupling scale. We clarify some subtleties that arise in the application of the Stuckelberg formalism to Hořava's model due to its non-relativistic nature.

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Metadata

Authors
Blas, D., Pujolàs, O., & Sibiryakov, S.
Venue
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Published
2009-10-12
Volume
2009
Issue
10
Pages
029-029
ISSN
1029-8479 (ISSN-L)
DOI
10.1088/1126-6708/2009/10/029
OpenAlex
W1978119830
Cited by
310
References
19
FWCI
29.88
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: On the extra mode and inconsistency of Hořava gravity. https://app.cochat.ai/papers/10.1088/1126-6708/2009/10/029
The paper
Blas, D., Pujolàs, O., & Sibiryakov, S. (2009). On the extra mode and inconsistency of Hořava gravity. Journal of High Energy Physics. https://doi.org/10.1088/1126-6708/2009/10/029

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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.