Tag archives: quantum dots

Artist’s impression of the single-photon source in action. (Courtesy: C Lu)

By Hamish Johnston

One requirement for many quantum-computing schemes is a device that can deliver a succession of single particles such as photons on demand. This has proven to be a challenge because in the quantum world probability reigns, so you can never be certain what will pop out of your device. Another challenging requirement is that these particles must be indistinguishable from each other.

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