Single-shot entangling gates using superexchange coupling for distant spin qubits

Semiconductor spin qubits are a promising quantum computing platform because of high-fidelity gate operations and foundry compatibility. However, the connectivity between qubits is mostly limited to neighboring qubits; one of the ways to enhance it is to use a superconducting resonator to mediate interactions between distant spin qubit modules. We propose single-shot entangling gates based on superexchange coupling between spin qubits which are not directly connected by the resonator. We find that some entangling gates can be implemented by controlling time-dependent coupling strengths between the qubits. This method could be more efficient than applying two-qubit gates multiple times in a discrete manner to achieve the same target operation. We discuss the effects of noise on the single-shot gates and suggest next steps for improving the quality of the gates.