## Gravity and the Quantum: Pedagogical Essays on Cosmology, Astrophysics, and Quantum GravityThis book provides a compilation of in-depth articles and reviews on key topics within gravitation, cosmology and related issues. It is a celebratory volume dedicated to Prof. Thanu Padmanabhan ("Paddy"), the renowned relativist and cosmologist from IUCAA, India, on the occasion of his 60th birthday. The authors, many of them leaders of their fields, are all colleagues, collaborators and former students of Paddy, who have worked with him over a research career spanning more than four decades. Paddy is a scientist of diverse interests, who attaches great importance to teaching. With this in mind, the aim of this compilation is to provide an accessible pedagogic introduction to, and overview of, various important topics in cosmology, gravitation and astrophysics. As such it will be an invaluable resource for scientists, graduate students and also advanced undergraduates seeking to broaden their horizons. |

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### Contents

1 | |

10 | |

21 | |

Mechanics of Apparent Horizon in Two Dimensional Dilaton Gravity | 30 |

Boundary Terms of the EinsteinHilbert Action | 43 |

Decay of the Cosmic Vacuum Energy | 60 |

A Matter of Perspective | 73 |

Piecewise Conserved Quantities | 88 |

Nonlocal Infrared Modifications of Gravity A Review | 221 |

Emergence of Gravity and RG Flow | 282 |

Modelling Nonparadoxical Loss of Information in Black Hole Evaporation | 303 |

A Feynman Problem | 317 |

Einstein Equations fromas Thermodynamics of Spacetime | 339 |

Thoughts on 50 Years in Astrophysics and Cosmology and on What Comes Next | 353 |

General Relativity and Beyond | 362 |

What Are the Atoms of the Space Time? | 375 |

Units of the Nonlinear Universe | 99 |

Selfsimilarity and Criticality in Gravitational Collapse | 117 |

Notes on Semiclassical Weyl Gravity | 127 |

Accelerated Observers Thermal Entropy and Spacetime Curvature | 145 |

Past Present and Future | 168 |

Pedagogical and Real Physics | 175 |

A Local Stress Tensor for Gravity Fields | 209 |

From Quantum to Classical in the Sky | 397 |

A Conflict of Interest | 411 |

Four Principles for Quantum Gravity | 426 |

What Do Detectors Detect? | 451 |

False Vacua and Topological Defects | 479 |

### Other editions - View all

Gravity and the Quantum: Pedagogical Essays on Cosmology, Astrophysics, and ... Jasjeet Singh Bagla,Sunu Engineer No preview available - 2019 |

Gravity and the Quantum: Pedagogical Essays on Cosmology, Astrophysics, and ... Jasjeet Singh Bagla,Sunu Engineer No preview available - 2017 |