QUANTUM computers leak information like water through a sieve-a problem that anyone hoping to build one must overcome. But a novel quantum logic gate based on photons could be the answer.
Electrons and ions can store quantum bits of data, but they tend to lose this information because they interact so easily with their environment. Scientists have long known that photons, which are less easily distracted, could do the job much better.
The snag is that photons will only process information if two of them can be made to interact-and they tend to pass through each other unaffected. But Takahiro…
