### Abstract

Loop quantum cosmology has provided a large set of insights about the dynamics of loop quantum gravity, based on symmetric (sometimes exactly solvable) model systems combined with advanced perturbation techniques around them. Starting with an exactly solvable, harmonic system (which happens to illustrate singularity resolution by providing examples for bouncing solutions) a systematic perturbation theory is set up. As a key challenge, it remains to formulate general inhomogeneities in a fully consistent way, respecting space-time covariance. Only if this is achieved can loop quantum gravity provide a valid proposal for a modified-gravity theory with quantum corrections, and by this gain access to observational constraints. Recent progress in this direction is described.

Original language | English (US) |
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Title of host publication | Gravitational Physics |

Subtitle of host publication | Testing Gravity from Submillimeter to Cosmic Scale - Proceedings of the VIII Mexican School on Gravitation and Mathematical Physics |

Pages | 66-80 |

Number of pages | 15 |

DOIs | |

State | Published - Aug 23 2010 |

Event | 8th Mexican School on Gravitation and Mathematical Physics - Playa del Carmen, Quintana Roo, Mexico Duration: Dec 6 2009 → Dec 12 2009 |

### Publication series

Name | AIP Conference Proceedings |
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Volume | 1256 |

ISSN (Print) | 0094-243X |

ISSN (Electronic) | 1551-7616 |

### Other

Other | 8th Mexican School on Gravitation and Mathematical Physics |
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Country | Mexico |

City | Playa del Carmen, Quintana Roo |

Period | 12/6/09 → 12/12/09 |

### All Science Journal Classification (ASJC) codes

- Ecology, Evolution, Behavior and Systematics
- Ecology
- Plant Science
- Physics and Astronomy(all)
- Nature and Landscape Conservation

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## Cite this

*Gravitational Physics: Testing Gravity from Submillimeter to Cosmic Scale - Proceedings of the VIII Mexican School on Gravitation and Mathematical Physics*(pp. 66-80). (AIP Conference Proceedings; Vol. 1256). https://doi.org/10.1063/1.3473880