Physicists have added a new trick to their experimental repertoire. In their latest feat, called atom interforometry, they paradoxically divide and recombine single atoms, aided by a beautiful but enigmatic assistant known as quantum mechanics.
Four teams have recently performed atom interferometry, each using a different technique to accomplish this same bit of seeming magic. Unlike real magicians, however, these physicists eagerly explain the mysteries of their craft. In the ...
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