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Information as a property in physics

Information as a property in physics: Encyclopedia II - Information as a property in physics

Main article: Physical information Information has a well defined meaning in physics. Examples of this include the phenomenon of quantum entanglement where particles can interact without reference to their separation or the speed of light. Information itself cannot travel faster than light even if the information is transmitted indirectly. This could lead to the fact that all attempts at physically observing a particle with an "entangled" relationship to another are slowed down, even though the particles are not ...

Information, Information - Etymology, Information - Information as a pattern, Information - Information as a property in physics, Information - Information as an influence which leads to a transformation, Information - Information as sensory input, Information - Information is Not data, Algorithmic information theory, Classified information, Fisher information, Freedom of information, Information entropy, Propaganda model, Free Information Infrastructure, Information theory, Information overload, Information processing, Information processor, Information mapping, Information technology, Library and Information Science, Medium, Observation, Physical information, Prediction, Receiver operating characteristic, Systems theory and cybernetics, Satisficing, The Information highway - A nickname of the Internet, dubbed the greatest source of information.

Information: Encyclopedia II - Information as a property in physics

Information - Information as a property in physics

Main article: Physical information

Information has a well defined meaning in physics. Examples of this include the phenomenon of quantum entanglement where particles can interact without reference to their separation or the speed of light. Information itself cannot travel faster than light even if the information is transmitted indirectly. This could lead to the fact that all attempts at physically observing a particle with an "entangled" relationship to another are slowed down, even though the particles are not connected in any other way other than by the information they carry.

Another link is demonstrated by the Maxwell's demon thought experiment. In this experiment, a direct relationship between information and another physical property, entropy, is demonstrated. A consequence is that it is impossible to destroy information without increasing the entropy of a system; in practical terms this often means generating heat. Thus, in the study of logic gates, the theoretical lower bound of thermal energy released by an AND gate is more than for the NOT gate (because information is destroyed in an AND gate and simply converted in an NOT gate). Physical information is of particular importance in the theory of quantum computers.

Other related archives

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Adapted from the Wikipedia article "Information as a property in physics", http://en.wikipedia.org/wiki/Information, under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki

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