From sand to superposition: A key step towards a powerful silicon quantum computer

Banner image by Tony Melov. Artistic representation of an engineered atomic array in silicon. In this example, each site of the array hosts two closely spaced antimony atoms. This atomic pair could serve as a building block to realise and control up to six nuclear spin qubits with a single electronic gate.

Silicon – made from beach sand – is the key material for today’s information technology industry because it is an abundant and versatile semiconductor. Scientists are already building quantum devices made from silicon engineered with dopant atoms – impurities intentionally added from other elements to change the properties of silicon. These devices can be programmed with quantum states […]

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