Inverted-circuit zero-noise extrapolation for quantum gate error
mitigation
- URL: http://arxiv.org/abs/2403.01608v1
- Date: Sun, 3 Mar 2024 20:27:27 GMT
- Title: Inverted-circuit zero-noise extrapolation for quantum gate error
mitigation
- Authors: Kathrin F. Koenig, Finn Reinecke, Walter Hahn and Thomas Wellens
- Abstract summary: We propose a simple method for estimating the strength of errors occurring in a quantum circuit.
The method determines the error strength for a circuit by appending to it the inverted circuit and measuring the probability of the initial state.
Our method proves to be particularly effective on current hardware, showcasing its suitability for near-term quantum computing applications.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: A common approach to deal with gate errors in modern quantum-computing
hardware is zero-noise extrapolation. By artificially amplifying errors and
extrapolating the expectation values obtained with different error strengths
towards the zero-error (zero-noise) limit, the technique aims at rectifying
errors in noisy quantum computing systems. For an accurate extrapolation, it is
essential to know the exact factors of the noise amplification. In this
article, we propose a simple method for estimating the strength of errors
occurring in a quantum circuit and demonstrate improved extrapolation results.
The method determines the error strength for a circuit by appending to it the
inverted circuit and measuring the probability of the initial state. The
estimation of error strengths is easy to implement for arbitrary circuits and
does not require a previous characterisation of noise properties. We compare
this method with the conventional zero-noise extrapolation method and show that
the novel method leads to a more accurate calculation of expectation values.
Our method proves to be particularly effective on current hardware, showcasing
its suitability for near-term quantum computing applications.
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