How to Build a Scalable Quantum Computer

Picture of an ion trap chip, on Science cover.In a pair of forward-looking articles, Christopher Monroe, Jungsang Kim, and Kenneth Brown layout the only known method for scaling quantum computers based on demonstrated science and technology. The proposed architecture is based on trapped atomic ion qubits, highlighting the need for “co-design” of applications to the machine and modularity.

The cover portrays a photograph of a surface trap that was fabricated by Sandia National Labs and used to trap ions at the Duke Quantum Center and IonQ, among other laboratories.