Toward Reliability in the NISQ Era: Robust Interval Guarantee for Quantum Measurements on Approximate States

Understand

Near-term quantum computation holds potential across multiple application domains.

• However, imperfect preparation and evolution of states due to algorithmic and experimental shortcomings, characteristic in the near-term implementation, would typically result in measurement outcomes deviating from the ideal setting.
• It is thus crucial for any near-term application to quantify and bound these output errors.
• We address this need by deriving robustness intervals which are guaranteed to contain the output in the ideal setting.