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arXiv · 1901.07383

The general gravitational Lagrangian with deformed covariance

Rhiannon Cuttell·Mairi Sakellariadou
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Abstract

We derive the gravitational Lagrangian to all orders of curvature when the canonical constraint algebra is deformed by a phase space function as predicted by some studies into loop quantum cosmology. The deformation function seems to be required to satisfy a non-linear equation usually found in fluid mechanics, and can form discontinuities quite generally.

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Rhiannon Cuttell, Mairi Sakellariadou. 2019-01-18. The general gravitational Lagrangian with deformed covariance. https://doi.org/10.1103/physrevd.102.104048

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