Robustness of error-suppressing entangling gates in cavity-coupled transmon qubits

Understand

Superconducting transmon qubits comprise one of the most promising platforms for quantum information processing due to their long coherence times and to their scalability into larger qubit networks.

• However, their weakly anharmonic spectrum leads to spectral crowding in multiqubit systems, making it challenging to implement fast, high-fidelity gates while avoiding leakage errors.
• To address this challenge, we use a protocol known as SWIPHT [Phys.
• Rev.