Resource Efficient Zero Noise Extrapolation with Identity Insertions

Understand

In addition to readout errors, two-qubit gate noise is the main challenge for complex quantum algorithms on noisy intermediate-scale quantum (NISQ) computers.

• These errors are a significant challenge for making accurate calculations for quantum chemistry, nuclear physics, high energy physics, and other emerging scientific and industrial applications.
• There are two proposals for mitigating two-qubit gate errors: error-correcting codes and zero-noise extrapolation.
• This paper focuses on the latter, studying it in detail and proposing modifications to existing approaches.