Ultrafast quantum computer uses optically controlled electrons

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The loop-qubus quantum computer involves a semiconductor chip with a loop of cavities containing quantum dots. By focusing optical pulses at individual quantum dots the electron spins within the dots rotate changing the state of the bit. Credit: Clar ...
The loop-qubus quantum computer involves a semiconductor chip with a loop of cavities containing quantum dots. By focusing optical pulses at individual quantum dots, the electron spins within the dots rotate, changing the state of the bit. Credit: Clark, et al.

Scientists have designed a scheme to create one of the fastest quantum computers to date using light pulses to rotate electron spins, which serve as quantum bits. This technique improves the overall clock rate of the quantum computer, which could lead to the fastest potentially scalable quantum computing scheme of which the scientists are aware.


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