Quantum Computing: Exploiting a Single‐Crystal Environment to Minimize the Charge Noise on Qubits in Silicon (Adv. Mater. 40/2020)

Abstract

Atom qubits in silicon provide a promising platform for realising a scalable quantum computer. In article number 2003361, Michelle Simmons and co-workers present a qubit environment with a notably low level of charge noise achieved by hosting phosphorus atoms in an all-crystalline silicon substrate well-separated from surface and interface states. The level of charge noise experienced by the phosphorus atoms is sufficiently low to enable two-qubit gate fidelities above 99.99%, well within the 99% threshold required for error-correction.