Scalable General Error Mitigation for Quantum Circuits

• URL: http://arxiv.org/abs/2411.07916v1
• Date: Tue, 12 Nov 2024 16:47:36 GMT
• Title: Scalable General Error Mitigation for Quantum Circuits
• Authors: Philip Döbler, Jannik Pflieger, Fengping Jin, Hans De Raedt, Kristel Michielsen, Thomas Lippert, Manpreet Singh Jattana,
• Abstract summary: In quantum computing, error mitigation is a method to improve the results of an error-prone quantum processor by post-processing them. We improve the General Error Mitigation (GEM) method for scalability. Experiments show that the mitigation works comparably well to GEM, while requiring a fraction of the calibration runs.
• Score: 0.3141085922386211
• License:
• Abstract: In quantum computing, error mitigation is a method to improve the results of an error-prone quantum processor by post-processing them on a classical computer. In this work, we improve the General Error Mitigation (GEM) method for scalability. GEM relies on the use of a matrix to represent the device error, which requires the execution of $2^{n+1}$ calibration circuits on the quantum hardware, where $n$ is the number of qubits. With our improved method, the number of calibration runs is independent of the number of qubits and depends only on the number of non-zero states in the output distribution. We run 1853 randomly generated circuits with widths between 2-7 qubits and depths between 10-140 gates on IBMQ superconducting devices. The experiments show that the mitigation works comparably well to GEM, while requiring a fraction of the calibration runs. Finally, an experiment to mitigate errors in a 100 qubit circuit demonstrates the scalable features of our method.

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