Superconducting transmon qubits are key to recent quantum computing advances. I will present our recent work on characterizing the noise afflicting these qubits beyond standard stochastic error models, then discuss quantum control methods to suppress this noise, aiming to improve gate fidelities and overall performance. References: - V. Tripathi, H. Chen, M. Khezri, K.-W. Yip, E. M. Levenson-Falk, D.A. Lidar, “Suppression of crosstalk in superconducting qubits using dynamical decoupling”. Phys. Rev. Applied 18, 024068 (2022). - V. Tripathi, H. Chen, E. Levenson-Falk, D.A. Lidar, “Modeling low- and high-frequency noise in transmon qubits with resource-efficient measurement”. Phys. Rev. X Quantum 5, 010320 (2024). - V. Tripathi, D. Kowsari, K. Saurav, H. Zhang, E.M. Levenson-Falk, D.A. Lidar, “Deterministic Benchmarking of Quantum Gates”. arXiv:2407.09942. - A. Vezvaee, V. Tripathi, D. Kowsari, E. Levenson-Falk, D.A. Lidar, “Virtual Z gates and symmetric gate compilation”. arXiv:2407.14782.