A lone ion in a trap jitters like a swing, and each oscillation introduces an error into quantum calculations. Traditionally, jitter is suppressed by cooling almost to absolute zero: this is bulky and expensive.
Physicists have found an elegant solution: the laser pulse smoothly changes frequency right during operation, canceling jitter. The beam acts like a precise push that stops the swing: instead of fighting the shaking, it harnesses it, calming the system’s entropy (disorder). A final check is performed by a detector with photometry, measuring faint light, and the error drops to 0.0084%. Remarkably, even with a ninefold increase in jitter, failures don’t exceed 0.05%.
Thus, the ideas of David Wineland and the dreams of Richard Feynman for accessible quantum machines are becoming reality — without the icy hell.
The temperature to which ions are typically cooled for quantum computing is thousands of times lower than interstellar space — colder than almost anything in the Universe.