Semiclassical and Stochastic Gravity

Semiclassical and Stochastic Gravity

Author: Bei-Lok B. Hu

Publisher: Cambridge University Press

Published: 2020-03-05

Total Pages: 615

ISBN-13: 0521193575

DOWNLOAD EBOOK

An overview of semi-classical gravity theory and stochastic gravity as theories of quantum gravity in curved space-time.


Gravitational Solitons

Gravitational Solitons

Author: Vladimir Belinski

Publisher: Cambridge University Press

Published: 2001-07-19

Total Pages: 280

ISBN-13: 9780521805865

DOWNLOAD EBOOK

This 2001 book explains the construction of exact soliton solutions to Einstein's theory of gravity.


Advances in the Interplay Between Quantum and Gravity Physics

Advances in the Interplay Between Quantum and Gravity Physics

Author: Peter G. Bergmann

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 553

ISBN-13: 9401003475

DOWNLOAD EBOOK

In this XVII Course of the International School of Cosmology and Gravitation devoted to "ADVANCES IN THE INTERPLAY BETWEEN QUANTUM AND GRAVITY PHYSICS" we have considered different aspects of the influence of gravity on quantum systems. In order to achieve this aim, in many lectures, seminars and discussions we have strengthened the interplay between gravity and quantum systems starting from the situation in the early universe based on astrophysical observations, up to the earthly based experiments with atom interferometry for probing the structure of space-time. Thus we have had timely lectures on the quantum field and horizon of a black hole including reviews of the problem of black holes thermodynamics and entropy, quantum information, quantum black holes, quantum evaporation and Hawking radiation, recent advances in stockastic gravity. We have also discussed quantum fluctuations in inflationary universe, quantum effects and reheating after inflation, and superplanckian energies in Hawking radiation. In this regard the subject of spinors in purely affine space-time and Dirac matter according to Weyl in the generalized theory of gravitation were developed . The dualism between space-time and matter has been deeply analyzed in order to see why, for general relativity, this is an obstacle for quantization of the theory. Also canonical Gravity and Mach's principle, torsion and curvature as commutator for Quantum Gravity and Dirac Geometry of real space-time were analysed, together with the problem of 5-Dimensional Projective Unified Field theory and Multidimensional Gravity and Cosmology.


Quantum Gravity in a Laboratory?

Quantum Gravity in a Laboratory?

Author: Nick Huggett

Publisher: Cambridge University Press

Published: 2023-06-30

Total Pages: 98

ISBN-13: 1009327550

DOWNLOAD EBOOK

The characteristic – Planck – energy scale of quantum gravity makes experimental access to the relevant physics apparently impossible. Nevertheless, low energy experiments linking gravity and the quantum have been undertaken: the Page and Geilker quantum Cavendish experiment, and the Colella-Overhauser-Werner neutron interferometry experiment, for instance. However, neither probes states in which gravity remains in a coherent quantum superposition, unlike – it is claimed – recent proposals. In essence, if two initially unentangled subsystems interacting solely via gravity become entangled, then theorems of quantum mechanics show that gravity cannot be a classical subsystem. There are formidable challenges to such an experiment, but remarkably, tabletop technology into the gravity of very small bodies has advanced to the point that such an experiment might be feasible in the near future. This Element explains the proposal and what it aims to show, highlighting the important ways in which its interpretation is theory-laden.