# Particular Solutions in Bimetric Theory and Their Implications

@article{Hassan2014ParticularSI, title={Particular Solutions in Bimetric Theory and Their Implications}, author={Sayed Fawad Hassan and Angnis Schmidt-May and Mikael von Strauss}, journal={arXiv: High Energy Physics - Theory}, year={2014} }

Ghost-free bimetric theory can describe gravity in the presence of an extra spin-2 field. We study certain aspects of dynamics in this theory: (1) It is shown that if either of the metrics is an Einstein solution then the other is always forced to be Einstein, too. For a class of bimetric models this constraint is stronger and as soon as one metric is Einstein, the other metric is forced to be proportional to it. As a consequence, the models in this class avoid a branch of pathological…

## 60 Citations

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A bstractThe ghost-free bimetric theory describes interactions of gravity with another spin-2 field in terms of two Lorentzian metrics. However, if the two metrics do not admit compatible notions of…

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### Algebraic properties of Einstein solutions in ghost-free bimetric theory

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A known fact is that an Einstein solution in one sector in ghost-free bimetric theory implies an Einstein solution in the other sector. Earlier studies have also shown that some classes of bimetric…

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Interactions in bimetric theory, which can describe gravity in the presence of an extra spin-2 field, are severely constrained by the requirement of the absence of the Boulware-Deser ghost…

### Analytical constraints on bimetric gravity

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Ghost-free bimetric gravity is an extension of general relativity, featuring a massive spin-2 field coupled to gravity. We parameterize the theory with a set of observables having specific physical…

### Constraints on bimetric gravity. Part II. Observational constraints

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- 2021

Ghost-free bimetric gravity is a theory of two interacting spin-2 fields, one massless and one massive, in addition to the standard matter particles and fields, thereby generalizing Einstein's theory…

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Ghost-free bimetric gravity is a theory of two interacting spin-2 fields, one massless and one massive, in addition to the standard matter particles and fields, thereby generalizing Einstein’s theory…

### Constraints on bimetric gravity. Part I. Analytical constraints

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Ghost-free bimetric gravity is an extension of general relativity, featuring a massive spin-2 field coupled to gravity. We parameterize the theory with a set of observables having specific physical…

### Ghost‐Free Completion of An Effective Matter Coupling in Bimetric Theory

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We consider a particular set of ghost‐free interactions for three spin‐2 fields in which we freeze out the dynamics of the metric tensor that couples to the matter sector. Integrating out the…

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