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Open AccessJournal ArticleDOI

On the Gravitization of Quantum Mechanics 2: Conformal Cyclic Cosmology

Roger Penrose
- 01 Aug 2014 - 
- Vol. 44, Iss: 8, pp 873-890
TLDR
The 2nd Law of thermodynamics was driven by the Big Bang being extraordinary special, with hugely suppressed gravitational degrees of freedom as mentioned in this paper, which cannot have been simply the result of a conventional quantum gravity.
Abstract
The 2nd Law of thermodynamics was driven by the Big Bang being extraordinary special, with hugely suppressed gravitational degrees of freedom. This cannot have been simply the result of a conventional quantum gravity. Conformal cyclic cosmology proposes a different picture, of a classical evolution from an aeon preceding our own. The ultimate Hawking evaporation of black holes is key to the 2nd Law and requires information loss, violating unitarity in a strongly gravitational context.

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Journal ArticleDOI

On the Gravitization of Quantum Mechanics 1: Quantum State Reduction

TL;DR: In this article, the authors argue that the case for "gravitizing" quantum theory is at least as strong as that for quantizing gravity, and that the principles of general relativity must influence, and actually change, the very formalism of quantum mechanics.
Journal ArticleDOI

Relativistic collapse dynamics and black hole information loss

TL;DR: In this article, a proposal for the resolution of the black hole information puzzle within the context of modified versions of quantum theory involving spontaneous reduction of the quantum state is presented, and for the first time, a treatment of the problem within a fully relativistic setting is presented.
Journal ArticleDOI

Editorial introduction to the special issue “The Renaissance of Einstein’s Theory of Gravitation”

TL;DR: In this paper, the authors focus on the post-World War II developments of the theory, which only recently has become the subject of a lively debate among historians of science and physicists actively working on General Relativity and closely related fields.
Journal ArticleDOI

Coupling matter and curvature in Weyl geometry: conformally invariant $$f\left( R,L_m\right) $$ gravity

TL;DR: In this article , the coupling of matter to geometry in conformal quadratic Weyl gravity was investigated, by assuming a coupling term of the form $$L_m{\tilde{R}}^2$$
Journal ArticleDOI

Conformal geometry of timelike curves in the (1+2)-Einstein universe

TL;DR: In this article, the conformal geometry of timelike curves in the ( 1 + 2 ) -Einstein universe is studied, and the existence and properties of closed trajectories for a conformal strain functional are investigated.
References
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Journal ArticleDOI

Particle Creation by Black Holes

TL;DR: In this article, it is shown that quantum mechanical effects cause black holes to create and emit particles as if they were hot bodies with temperature, which leads to a slow decrease in the mass of the black hole and to its eventual disappearance.
Book

The road to reality : a complete guide to the laws of the universe

Roger Penrose
TL;DR: The Road to Reality as mentioned in this paper provides a comprehensive account of our present understanding of the physical universe, and the essentials of its underlying mathematical theory, and provides a feeling for the deep beauty and philosophical connotations of the subject, as well as of its intricate logical interconnections.
Journal ArticleDOI

The pre-big bang scenario in string cosmology

TL;DR: In this paper, physical motivations, phenomenological consequences, and open problems of the so-called pre-big bang scenario in superstring cosmology are reviewed, as well as some open problems.

Phenomenological aspects of the pre-big-bang scenario in string cosmology

TL;DR: In this article, the authors review various aspects of the pre-big-bang scenario and of its main open problems, with emphasis on the role played by the dilaton, and show that tests of this scenario are direct tests of string theory and also, more generally, of Planck scale physics.
Journal ArticleDOI

Information loss in black holes

TL;DR: In this article, the question of whether information is lost in black holes is investigated using Euclidean path integrals, and the formation and evaporation of black holes are regarded as a scattering problem with all measurements being made at infinity.