Estimator Calculate expectation values

Efficiently calculate and interpret expectation values of the quantum operators required for many algorithms with Estimator. Explore uses in molecular modeling, machine learning, and complex optimization problems.

View API Reference

Try out Estimator

To run these code samples please follow the quick start instructions found here.

Run a single experiment

Use Estimator to determine the expectation value of a single circuit-observable pair

Run multiple experiments in a single job

Use Estimator to determine the expectation values of multiple circuit-observable pairs

Run asynchronous experiments

Execute jobs in parallel to determine the expectation values of multiple circuit-observable pairs

Run parametrized circuits

Leverage parameter values to increase circuit reusability

Run on real systems using Qiskit Runtime

Explore session and execution options to optimize circuit performance on quantum systems

Advanced tutorials

Demonstrate the violation of the CHSH inequality with Estimator