Tangling schedules eases hardware connectivity requirements for quantum error correction

Understand

Quantum computers have the potential to change the way we solve computational problems.

• Due to the noisy nature of qubits, the need arises to correct physical errors occurring during computation.
• The surface code is a promising candidate for such error correction that shows high threshold and which can store a logical quantum state on hardware with square-grid connectivity, a type of device that already exists.
• However, for logical quantum computation, the measurement of some irregular, non-local stabilisers is required, and it is not currently known how to do this without modifying the connectivity of the hardware.