Single-Shot Single-Gate rf Spin Readout in Silicon

Eliminating cords to scale up quantum computing

28 August 2019

A demonstration of a compact and sensitive method to read out information stored on single atoms bodes well for scaling up quantum computers.

A promising way to realize large-scale quantum computing is to store information using electrons on single atoms of semiconductors. But these single atoms need to be placed very close together so that they can talk to each other. This can cause problems since there is little room left for the electrodes needed to read from and write to the atoms.

Now, eight researchers from the University of New South Wales in Australia have cut the number of electrodes and sensors needed from four to two while maintaining a high sensitivity. They demonstrated that read out can be done in a single measurement, meaning that there is no need to average multiple measurements. This will help scale up the technology.

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References

1. Physical Review X 8, 041032 (2018). doi: 10.1103/physrevx.8.041032