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Showing posts with label quantum gravity. Show all posts
Showing posts with label quantum gravity. Show all posts

2010-03-28

Is gravity a phenomenon that emerges from the laws of thermodynamics and information theory?

From Technology Review:

A few month's ago, Erik Verlinde at the the University of Amsterdam put forward one such idea which has taken the world of physics by storm. Verlinde suggested that gravity is merely a manifestation of entropy in the Universe. His idea is based on the second law of thermodynamics, that entropy always increases over time. It suggests that differences in entropy between parts of the Universe generates a force that redistributes matter in a way that maximises entropy. This is the force we call gravity.
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2009-12-17

Proposed Spacetime Structure Could Provide Hints for Quantum Gravity Theory

From PhysOrg.com:

Spacetime, which consists of three dimensions of space and one time dimension, is such a large, abstract concept that scientists have a very difficult time understanding and defining it. Moreover, different theories offer different, contradictory insights on spacetime’s structure. While general relativity describes spacetime as a continuous manifold, quantum field theories require spacetime to be made of discrete points. Unifying these two theories into one theory of quantum gravity is currently one of the biggest unsolved problems in physics.
Full article