Simulating and mitigating crosstalk

Understand

We describe an efficient and scalable framework for modeling crosstalk effects on quantum information processors.

• By applying optimal control techniques, we show how to tuneup arbitrary high-fidelity parallel operations on systems with substantial local and nonlocal crosstalk.
• Simulations show drastically lower error rates for a 2D square array of 100 superconducting transmon qubits.
• These results suggest that rather than striving to engineer away undesirable interactions during fabrication, we can largely mitigate their effects through careful characterization and control optimization.