Researchers at the Department of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden; Department of Chemistry, Princeton University, Princeton, NJ, USA; Department of Electrical and Computer Engineering, Princeton University, Princeton, NJ, USA; and VTT Technical Research Centre of Finland, FI-02044 VTT, Finland have demonstrated a protocol for fixed-frequency transmon qubits, an architecture compatible with the surface code, that simultaneously addresses both qubit reset and leakage reduction. This combined capability is desirable for successful quantum error correction. The authors state that experiments involved a pair of qubits. This work reports a complete cycle of qubit reset, leakage reduction, and coupler reset in 83 nanoseconds, enabling fixed-frequency qubit architectures as potential building blocks for future fault-tolerant quantum computers and offering a means to reduce error correction cycle runtime. Tunable Couplers Enable Fast Qubit Reset and Leakage Reduction Over 99% fidelity in qubit reset and leakage reduction has been demonstrated using a novel protocol with fixed-frequency transmon qubits, a result that directly addresses a critical bottleneck in building practical quantum computers. This approach allows for the swift transfer of unwanted energy from qubits to a readout resonator, where it dissipates into the feedline, effectively resetting the qubit state. The architecture employed is specifically designed for compatibility with the surface code, a leading candidate for fault-tolerant quantum computing, pairing fixed-frequency transmon qubits with these tunable couplers. Unlike many existing reset schemes that require additional hardware or complex control signals, this protocol operates within the constraints of current fixed-frequency qubit technology. The team’s design utilizes the tunable couplers to implement a qubit-coupler (QC) SWAP gate, initially tuning the coupler on resonance with the ancilla qubit, Q_0, while leaving the data qubit, Q_1, unaffected. This initial step is crucial for preparing the system for subsequent energy transfer and dissipation. This speed is essential for minimizing