Schrodinger's SQUID. (quantum mechanics) (Science and Technology)
Economist (US), The, January, 1991
CURIOSITY killed the most famous cat in science-or else it saved him. The curiosity was not his own but that of a hypothetical scientist, who looked inside a box to see whether the cat was alive or dead. According to the leading interpretation of quantum mechanics-the theory which underpins the workings of everything from stars to silicon chips-the cat in this rather special hypothetical box is neither alive nor dead until somebody looks inside. The cat was invented early this century by an Austrian scientist, Erwin Schrijdinger, to underline the apparently paradoxical nature of quantum mechanics. An ingenious new experiment has confirmed that it is just as paradoxical as he feared.
The story begins with one of the basic concepts of quantum theory, the...
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