In the world of social media, “keeping receipts” refers to the practice of storing evidence that may come in handy for a callout post at a later date. For [Teddy Warner], though, it’s more applicable ...

Artistic impression of an array of near-perfect single-photon emitters, each consisting of a single quantum dot embedded in the centre of an elliptical Bragg grating microcavity. The devices emit ...

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