## Physics Meets Philosophy at the Planck Scale: Contemporary Theories in Quantum GravityThe greatest challenge in fundamental physics attempts to reconcile quantum mechanics and general relativity in a theory of "quantum gravity." The project suggests a profound revision of the notions of space, time and matter. It has become a key topic of debate and collaboration between physicists and philosophers. This volume collects classic and original contributions from leading experts in both fields for a provocative discussion of the issues. It contains accessible introductions to the main and less-well-known known approaches to quantum gravity. It includes exciting topics such as the fate of spacetime in various theories, the so-called "problem of time" in canonical quantum gravity, black hole thermodynamics, and the relationship between the interpretation of quantum theory and quantum gravity. This book will be essential reading for anyone interested in the profound implications of trying to marry the two most important theories in physics. |

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#### LibraryThing Review

User Review - fpagan - LibraryThingThe funny thing about this one is that the philosopher-authored chapters tend to be more mathematically impenetrable than the scientist-authored chapters. Read full review

### Contents

Introduction | 1 |

Theories of Quantum Gravity and their Philosophical Dimensions | 31 |

Spacetime and the philosophical challenge of quantum gravity | 33 |

Naive quantum gravity | 90 |

Quantum spacetime What do we know? | 101 |

Strings | 123 |

Reflections on the fate of spacetime | 125 |

A philosopher looks at string theory | 138 |

On general covariance and best matching | 199 |

PreSocratic quantum gravity | 213 |

The origin of the spacetime metric Bells Lorentzian pedagogy and its significance in general relativity | 256 |

Quantum Gravity and the Interpretation of Quantum Mechanics | 273 |

Quantum spacetime without observers Ontological clarity and the conceptual foundations of quantum gravity | 275 |

On gravitys role in quantum state reduction | 290 |

Why the quantum must yield to gravity | 305 |

339 | |

### Other editions - View all

Physics Meets Philosophy at the Planck Scale: Contemporary Theories in ... Craig Callender,Nick Huggett No preview available - 2001 |

### Common terms and phrases

approach argument background black hole canonical Chapter classical co-ordinates complete conceptual configuration connection consider constant constraint construct corresponding course covariance defined described determined diffeomorphism discussion dynamical effects Einstein energy equations evolution example existence expect fact formulation function fundamental gauge geometry give given gravitational field Hamiltonian idea important interaction interpretation invariance involve issues limit manifold mass mathematical matter means measurement metric motion nature Newtonian objects observables operator particle particular phase space philosophical physical position possible precisely principle problem programme proposal quantities quantization quantum field theory quantum gravity quantum mechanics quantum theory question radiation reason reference relativity represent require respect role sense solution space spacetime spatial special relativity standard string string theory structure suggest superposition tensor transformations understanding universe values variables vector wave function