Complexity Digest 2004.44 - 04
Excerpts: Physical existence and information content are inextricably linked. (...), "It from bit."
Black holes might seem like the exception to the rule that everything computes. (...) according to Einstein's general theory of relativity, getting information out is impossible. (...) In the 1970s Stephen Hawking of the University of Cambridge showed that when quantum mechanics is taken into account, black holes do have an output: they glow like a hot coal. In Hawking's analysis, this radiation is random, however. It carries no information about what went in.
Earlier this year Dr. Hawking changed his mind, see
Hawking cracks Black Hole Paradox , ComDig 2004.29.
- Source: Black Hole Computers
[ http://www.sciam.com/article.cfm?chanID=sa006&colID=1&articleID=00064D2C-6FE4-1179-AF8683414B7F0000 ], Scientific American, 04/11