Simulating and Mitigating Crosstalk

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 systems with substantial local nonlocal crosstalk. Simulations drastically lower error rates a 2D square array of 100 superconducting transmon qubits. These results suggest that rather than striving engineer away undesirable interactions during fabrication, can largely mitigate their through careful characterization optimization.