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Showing posts with label information theory. Show all posts
Showing posts with label information theory. 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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2010-03-10

Research streamlines data processing to solve problems more efficiently

From PhysOrg.com:

Researchers at North Carolina State University have developed a new analytical method that opens the door to faster processing of large amounts of information, with applications in fields as diverse as the military, medical diagnostics and homeland security.
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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.
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2009-09-10

How to Measure What We Don't Know

From PhysOrg.com:

How do we discover new things? For scientists, observation and measurement are the main ways to extract information from Nature. Based on observations, scientists build models that, in turn, are used to make predictions about the future or the past. To the extent that the predictions are successful, scientists conclude that their models capture Nature’s organization. However, Nature does not reveal secrets easily - there is no way for observers to learn everything about a process, so some information always remains hidden from view; other kinds of information are present, but difficult to extract. In a recent study, researchers have investigated how to measure the degree of hidden information in a process (its “crypticity”) and, along the way, solved several puzzles involved in extracting, storing, and communicating information.
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2009-06-24

Could Maxwell's Demon Exist in Nanoscale Systems?

From PhysOrg.com:

Maxwell’s demon may be making a comeback. Physicists know that the demon, an imaginary creature that decreases the entropy of a system, cannot exist in macroscopic systems due to the energy it requires to perform its role. However, a recent study has shown that, on the nanoscale, Maxwell’s demon might be able to do its work with much less energy than previously thought due to tiny thermal fluctuations that occur in small systems
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