Near-Term Register-Based Trapped-Ion Quantum Processors*

The Quantum Charge-Coupled Device (QCCD) architecture provides a scalable platform for trapped-ion quantum processors, enabling all-to-all connectivity between the atomic ion qubits. In the past, all fundamental building blocks of this architecture have been demonstrated successfully. However, combining those techniques into scalable devices is a current research topic. We present surface-electrode trap layouts for near-term quantum processors developed by our group for up to 50 atomic ion qubits, highlighting the design and simulation of radiofrequency (RF) junctions and bucket-brigade storage registers.