Scalable transport of trapped-ion qubits in a surface-electrode RF Paul trap

In the quantum charge-coupled device (QCCD) architecture for trapped-ion quantum computers, any-to-any connectivity is achieved via physical transport of qubits in time-varying potentials of a surface-electrode RF Paul trap. However, current surface traps require ~ 10 classical control signals per qubit, which is infeasible at a large scale. We present a path to scalable ion transport in the WISE architecture [1], which takes advantage of in-vacuum switch networks and symmetries in surface trap designs to reduce the number of analog signal sources to ~ 200 for a 1000-qubit system, and transport through junctions, which enable efficient ion sortng and routing algorithms.

[1] Malinowski, M., et al., PRX Quantum 4, 040313 (2023).