One-dimensional quantum computing with a 'segmented chain' is feasible with today's gate fidelities

Understand

In principle a 1D array of nearest-neighbour linked qubits is compatible with fault tolerant quantum computing.

• However such a restricted topology necessitates a large overhead for shuffling qubits and consequently the fault tolerance threshold is far lower than in 2D architectures.
• Here we identify a middle ground: a 1D segmented chain which is a linear array of segments, each of which is a well-connected zone with all-to-all connectivity.
• The architecture is relevant to both ion trap and solid-state systems.