Gravitation

See also:

• Science: Physics: Quantum Mechanics: Quantum Field Theory: Superstrings  (26)
• Science: Physics: Relativity  (428)

• Quantum Gravity   - A site maintained by Cambridge University on advances in quantum theories of gravity.

• Astronomy Today - Quantum Gravity - Astronomy Today - Article on Gamma Ray bursts which may reveal Quantum Gravity.
• Canonical Quantum Gravity - This is a summary of a talk delivered at the workshop, "Quantum gravity in the Southern Cone II".
• Cause of gravity and an explanation of field dynamics - An intuitive contribution to the gravity debate.
• Classical and Quantum Gravity - 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.
• Cosmological applications of loop quantum gravity - 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.
• Discrete Approaches to Quantum Gravity - 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.
• Gravitational Theory - Views on The Directional Gravity Theory.
• Gravity as an Effective Field Theory - This is a pedagogical introduction to the treatment of general relativity as a quantum effective field theory.
• How far are we from the quantum theory of gravity? - 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.
• How gravity works at microscopic scales - Discusses in simple terms the problem of constructing a quantum theory of gravity.
• An Introduction to Simplicial Gravity - Contains introductory material on quantum mechanics and relativity and outlines one method of combining the two theories.
• Knots and Quantum Gravity - 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.
• Loop Quantum Gravity - A general overview of ideas, results and open problems of loop quantum gravity.
• Loop quantum gravity induced modifications to particle dynamics - 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.
• Matters of Gravity - An online journal with articles on advances in the theories of gravity.
• Max Planck Institute for Gravitational Physics - Institute established to pursue research in gravitational physics, especially general relativity and quantum gravity.
• A new road to the Quantum Gravity - 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.
• Numerical Quantum Gravity - An overview of work being done in the field of quantum gravity.
• An Ode to Effective Lagrangian - 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.
• Perimeter Institute for Theoretical Physics - International focal point of cutting-edge research in foundational theoretical physics.
• Physics News Update - Quantum Gravitational States - Quantum gravitational states have been observed for the first time. An experiment with ultracold neutrons.
• PhysicsWeb - Neutrons reveal quantum effects of gravity. - PhysicsWeb, A resource for physicists, PhysicsWorld, Institute of Physics, Electronic Publishing, online products and services.
• Quantum Gravity - Quantum Gravity: A road map towards the Grand Unified Theory.
• Quantum Gravity - A brief explanation of the search for a quantum theory of gravity, including links to sites on topological field theories.
• Quantum Gravity and M-Theory - A review of modern approaches to quantum gravity.
• Quantum Relativity Theory of Everything - Preliminary look at a new approach to Relativity, Cosmology and the Quantum nature of the universe.
• Sir Isaac Newton: The Universal Law of Gravitation - Provides a simple introduction to the law for which Newton is best known.
• Spin Foam Models - A review of the spin foam formulation of quantum gravity.
• Strings, Loops and Others - This postscript file includes a review of the present theoretical attempts to understand the quantum properties of spacetime.
• Summary Report of the D2 Workshop - A review of material presented at 1998 conference on quantum cosmology.
• Throwing Einstein for a Loop - A summary of loop quantum gravity. Physicist Fotini Markopoulou Kalamara discusses the connection between relativity and quantum theory.