Practical adaptive quantum tomography

Understand

We introduce a fast and accurate heuristic for adaptive tomography that addresses many of the limitations of prior methods.

• Previous approaches were either too computationally intensive or tailored to handle special cases such as single qubits or pure states.
• By contrast, our approach combines the efficiency of online optimization with generally applicable and well-motivated data-processing techniques.
• We numerically demonstrate these advantages in several scenarios including mixed states, higher-dimensional systems, and restricted measurements.