Benchmarking bosonic modes for quantum information with randomized displacements

Understand

Bosonic modes are prevalent in all aspects of quantum information processing.

• However, existing tools for characterizing the quality, stability, and noise properties of bosonic modes are limited, especially in a driven setting.
• Here, we propose, demonstrate, and analyze a bosonic randomized benchmarking (BRB) protocol that uses randomized displacements of the bosonic modes in phase space to determine their quality.
• We investigate the impact of common analytic error models, such as heating and dephasing, on the distribution of outcomes over randomized displacement trajectories in phase space.