Freezing magnetic monopoles: How dipoles become monopoles and vice versa
> Magnetic monopoles, entities with isolated north or south magnetic poles, weren't supposed to exist. If you try to saw a bar magnet in half, all you succeed in getting are two magnets, each with a south and north pole. In recent years, however, the existence of monopoles, at least in the form of "quasiparticles" consisting of collective excitations among many atoms, has been predicted and demonstrated in the lab. Now Stephen Powell, a scientist at the Joint Quantum Institute (JQI) and the University of Maryland, has sharpened the theoretical framework under which monopoles can operate
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> Read more at:
http://phys.org/news/2012-08-magnetic-monopoles-dipoles-vice-versa.html#jCp
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-Sam Wormley