Predicting Non-Markovian Superconducting-Qubit Dynamics from Tomographic Reconstruction

Non-Markovian noise presents a particularly relevant challenge in understanding and combating decoherence quantum computers, yet is challenging to capture terms of simple models. Here we show that phenomenological dynamical model known as the post-Markovian master equation (PMME) accurately captures predicts non-Markovian superconducting qubit system. The PMME constructed using experimentally measured state dynamics an IBM Quantum Experience cloud-based processor, thus successfully observed later experiments. also allows extraction information about crosstalk measures non-Markovianity. We demonstrate definitively subsequent processor better than standard Markovian equation.