Ion trap NIST physicists demonstrated sustained, reliable quantum information processing in the ion trap at the left centre of this photograph, improving prospects for building a practical quantum computer. The ions are trapped inside the dark slit (3.5 mm long and 200 µm wide) between the gold-covered alumina wafers. By changing the voltages applied to each of the gold electrodes, scientists can move the ions between the six zones of the trap. (Credit: J Jost/NIST)
The first complete ‘quantum computer’
For decades physicists have dreamed of building a
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