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A brief explanation of the search for a quantum theory of gravity, including links to sites on topological field theories.
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Quantum Gravity Quantum gravity is the study of theories which incorporate known gravitational and quantum phenomena. This usually involves the assumption that gravity is itself a quantum phenomenon. This can be studied by considering the more general class of quantum field theories...The construction of a consistent theory of quantum gravity is a problem in theoretical physics that has so far defied all attempts at resolution. Reviewed here are three major areas of research: gauge-theoretic approaches; quantum Regge calculus; and the method of dynamical triangulations.
http://www.livingreviews.org/Art...Volume1/1998-13loll/article.html
An overview of work being done in the field of quantum gravity.
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Numerical Quantum Gravity For numerical quantum gravity to be useful, methods must be found to make the calculations meaningful by introducing an appropriate definition of quantum observables. A recent breakthrough has been made in the formulation of black hole and wormhole dynamics. This...A site maintained by Cambridge University on advances in quantum theories of gravity.
http://www.damtp.cam.ac.uk/user/gr/public/qg_home.html
Contains introductory material on quantum mechanics and relativity and outlines one method of combining the two theories.
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SimScience An introduction to simplicial quantum gravity An introduction to simplicial quantum gravity About three hundred years ago Isaac Newton wrote down rules describing the mechanics of moving objects. He also described gravity as a force that pulls massive objects together. Isaac Newton (1642-1727) We know today...A general overview of ideas, results and open problems of loop quantum gravity.
http://www.livingreviews.org/Articles/Volume1/1998-1rovelli/
An online journal with articles on advances in the theories of gravity.
http://www.phys.lsu.edu/mog
Discusses in simple terms the problem of constructing a quantum theory of gravity.
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How Gravity Works at Microscopic Scales Newton understood gravity in a rather mechanical way 1) Objects with mass simply attract each other. The more mass they have, the stronger the attraction 2) The force weakens as the separation between bodies increases This, by the way, explains...The book "Knots and Quantum Gravity" is the proceedings of a conference held at U.C. Riverside on May 14-16th, 1993. It is now available for free in Postscript format.
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Knots and Quantum Gravity Gravity is the proceedings of a conference held at U. C. Riverside on May 14-16th, 1993. It contains the following papers: The loop formulation of gauge theory and gravity, by Renate Loll. Representation theory of analytic holonomy C* algebras, by...A scientific american article which gives a summary of loop quantum gravity.
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Science Technology at Scientific American.com: Throwing Einstein for a Loop Physicist Fotini Markopoulou Kalamara has developed a way to connect relativity with quantum theory--while making sure that cause still precedes effect Kalamara has developed a way to connect relativity with quantum theory--while making sure that cause still precedes effect By Amanda Gefter 1 2 next FOTINI MARKOPOULOU KALAMARA: QUANTIZING...A review of the spin foam formulation of quantum gravity.
http://arxiv.org/abs/gr-qc/0301113
An assessment is offered of the progress that the major approaches to quantum gravity have made towards the goal of constructing a complete and satisfactory theory. The emphasis is on loop quantum gravity and string theory, although other approaches are discussed.
http://arxiv.org/abs/hep-th/0303185
An simple overview of current theories of quantum gravity.
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Qgravity.org: Quantum Gravity, Physics and Philosophy Gravity is moving in and out of some best seller lists including the science bestseller lists at Blackwells (best seller list is in the right sidebar) and at Amazon.com. August2001 Scientific American published Chet Raymo's review of Three Roads to...PhysicsWeb, A resource for physicists, PhysicsWorld, Institute of Physics, Electronic Publishing, online products and services.
http://physicsweb.org/article/news/6/1/9
Astronomy Today - Article on Gamma Ray bursts which may reveal Quantum Gravity.
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Astronomy Today Space Science Quantum Gravity Coupons advertising network Cheap Premium Tickets Philadelphia Eagles Tickets Patriots Tickets Rolling Stones Tickets The Odd Couple Tickets Space Science Section Quantum Gravity Gamma ray bursts those terrific and mysterious flashes of high-energy light now considered to be probes to...Quantum gravitational states have been observed for the first time. An experiment with ultracold neutrons.
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Physics News Update Quantum gravitational states have been observed for the first time. An experiment with ultracold neutrons shows that their vertical motion in Earth's gravitational field come in discrete sizes. Quantum properties--such as the quantization of energies, wavelike dynamics including interference, and...The construction of effective Hamiltonians arising from Loop Quantum Gravity and incorporating Planck scale corrections to the dynamics of photons and spin 1/2 particles is summarized.
http://arxiv.org/abs/hep-ph/0303189
After a brief introduction to classical and quantum gravity we discuss applications of loop quantum gravity in the cosmological realm. This includes the basic formalism and recent results of loop quantum cosmology.
http://arxiv.org/abs/gr-qc/0306008
This is a summary of a talk delivered at the workshop "Quantum gravity in the Southern Cone II".
http://arxiv.org/abs/gr-qc/9806119
This is a pedagogical introduction to the treatment of general relativity as a quantum effective field theory.
http://arxiv.org/abs/gr-qc/9512024
A review of modern approaches to quantum gravity.
http://arxiv.org/abs/gr-qc/9803065
A brief introduction is given to the methods of effective lagrangians. The emphasis is on a summary of the overall picture, using a simple model of quantum gravity.
http://arxiv.org/abs/hep-ph/9812470
A review of material presented at 1998 conference on quantum cosmology.
http://arxiv.org/abs/gr-qc/9803089
This postscript file contains a review of the present theoretical attempts to understand the quantum properties of spacetime.
http://arxiv.org/abs/gr-qc/9803024
Views on The Directional Gravity Theory.
http://www.ameritech.net/users/d...ynolds1/GravitationalTheory.html
Preliminary look at a new approach to Relativity, Cosmology and the Quantum nature of the universe.
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Alignment Theory: New Quantum Relativity Theory of Everything This paper is a preliminary look at a new, very simple approach to Relativity, Cosmology and the Quantum nature of the universe. This approach is based on a mixture of existing mainstream ideas and some new ones, put together in...A journal for physicists, mathematicians and cosmologists working in the fields of gravitation and the theory of spacetime. Abstracts, full text editorials, and freely available featured articles.
http://www.iop.org/EJ/journal/0264-9381
International focal point of cutting-edge research in foundational theoretical physics.
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Perimeter Institute for Theoretical Physics les cookies doivent être autorisés pour accéder correctement au site internetcookies must be enabled to properly view this web site..."How many angels can dance on the head of a pin?" A discussion on a theological question since the Middle Ages.
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HotAIR Quantum Gravity Treatment of the Angel Density Problem We derive upper bounds for the density of angels dancing on the point of a pin. It is dependent on the assumed mass of the angels, with a maximum number of 8.6766*10exp49 angels at the critical angel mass (3.8807*10exp-34 kg...Institute established to pursue research in gravitational physics, especially general relativity and quantum gravity.
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Max Planck Institute for Gravitational Physics, Potsdam Welcome HOME Contact Links Job Offers Sitemap Disclaimer Intranet Deutsch About the Institute Visitor Information Studying at the Institute Max Planck Research School Research Library table width 20 height 41 bord...Quantum Gravity: A road map towards the Grand Unified Theory.
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Gravity Our understanding of the nature of gravity today is due to the fruitful works of many scientists whose main aim was to propose another vision that reflects the realities in which we live. Throughout the history of scientific research, men...This Web site explores the possibility that our universe is not an isolated system. From this hypothesis a quantum origin of the gravitation is obtained.
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Look for something in particular in this place: powered by FreeFind 3. QUANTUM GRAVITY A new road to the Quantum Gravity PACS: 04.60.-m, 98.80.-k 1. Introduction Is our universe an isolated system? All the cosmological models to date are based...