Note:

The documentation for Classical Shadows in Mitiq is still under construction. This users guide will change in the future.

Classical Shadows

Classical shadows protocol [16] aims to create an approximate classical representation of a quantum state using minimal measurements. The protocol is based on the idea of shadow tomography, which is a technique for reconstructing a quantum state from a small number of measurements. This approach not only characterizes and mitigates noise effectively but also retains sample efficiency and demonstrates noise resilience [17]. For more details, see the section Classical Shadow Protocol and its Robust Estimation.

Workflow of the robust shadow estimation (RSE) in Mitiq.

You can get started with shadows in Mitiq with the following sections of the user guide:

• How Do I Use Classical Shadows Estimation?
• What is the theory behind Classical Shadow Estimation

Here are some examples on how to use shadows in Mitiq:

• Classical Shadows Protocol with Cirq

• Robust Shadows Estimation with Cirq