http://www.wired.com/news/technology/0%2c70001-0.html?tw=wn_tophead_5
...
So, on a semiconductor chip roughly the size of a postage stamp, the
Michigan scientists designed and built a device known as an ion trap,
which allowed them to isolate individual charged atoms and manipulate
their quantum states.
...
The new chip, which is made of gallium arsenide, should be easily
scaled and mass-produced, because it's made using microlithography --
the same process that makes microchips.
...
--Steven M. Bellovin, http://www.cs.columbia.edu/~smb
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