Robust phase estimation for two-qubit gates

Fast and accurate gate calibration is necessary for quantum computing. In this talk we present protocols that allow you to robustly tune up arbitrary two qubit gates with high accuracy. We generalize iterative phase and Hamiltonian estimation procedures developed for single qubits to two qubit gates. The resulting protocol has Heisenberg limited scaling when estimating any of the gate parameters, and inherits the robustness guarantees of RPE on single qubit gates.