If successful, fault tolerance would allow quantum computers to perform long, reliable calculations that are impossible on current devices. Building toward fault-tolerant quantum computingToday’s quantum computers are limited by errors that arise as quantum information interacts with its environment. Fault-tolerant quantum computing seeks to overcome this challenge by encoding information into logical qubits protected by quantum error correction. By designing the hardware and software together, the team aims to reduce the overhead normally required for fault-tolerant quantum computing. The proposed processor is designed to support digital quantum simulation, one of the earliest anticipated applications of fault-tolerant quantum computers.