# Chameleonic Theories: A Short Review

@article{Zanzi2015ChameleonicTA, title={Chameleonic Theories: A Short Review}, author={Andrea Zanzi}, journal={arXiv: General Relativity and Quantum Cosmology}, year={2015} }

In the chameleon mechanism, a field (typically scalar) has a mass that depends on the matter density of the environment: the larger is the matter density, the larger is the mass of the chameleon. We briefly review some aspects of chameleonic theories. In particular, in a typical class of these theories, we discuss the lagrangian, the role of conformal transformations, the equation of motion and the thin-shell effect. We also discuss $f(R)$ theories and chameleonic quantum gravity.

## 8 Citations

### Chameleon fields and solar physics

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### Constraining the Schwarzschild-de Sitter Solution in Models of Modified Gravity

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### Effect of chameleons on the mass of a galaxy cluster

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### Gauss-Bonnet dark energy Chaplygin gas model

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We argue that primordial dark matter halos could be generated during radiation domination by long-range attractive forces stronger than gravity. In this paper, we derive the conditions under which…

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