DRAG-Enhanced Parametric Coupler Gates in a 6-Transmon Qubit Quantum Processor

A central challenge in scaling superconducting quantum processors is achieving high-fidelity multi-qubit gates while suppressing crosstalk, leakage, and phase errors. Our fenceline device consists of six fixed-frequency transmon qubits arranged in two linked modules, connected via two SNAIL couplers that enable parametric exchange gates through three-wave mixing processes. Within each module, a SNAIL is coupled to four qubits, allowing for six possible two-qubit gates. However, due to finite hybridization among qubits in neighboring modules, a pulse applied within one module can induce partial, unwanted rotations on spectator qubits in the other module. In this talk, we study the use of pulse shaping techniques such as DRAG in combination with pulses applied to spectator snails to cancel unwanted spectator interactions across our multi-module architecture. We will present experimental results from devices and explore our ability to use our pulse control techniques to allow identical or at least extremely close (< 50 MHz) repetitions of qubits and qubit-qubit frequencies in neighboring modules.