Transferring encoded qubits and code switching via shuttling in semiconductor quantum processors

Quantum processor architectures that have both memory and computing regions have been proposed. In such architectures, memory regions utilize quantum error-correcting codes with higher encoding rates, while computing regions employ codes optimized for gate operations. These architectures require ability to transfer encoded qubits between regions and to switch between different error-correcting codes. Semiconductor quantum processors, particularly those using spin qubits, offer a promising solid-state platform owing to their potential for qubit transport via shuttling. However, current shuttling technologies are still under development and may be limited in the number of qubits that can be moved simultaneously. In this work, we study a method for transferring and switching an encoded qubit under these constraints, which will be suitable for implementation in semiconductor quantum processors.