%0 Journal Article
%T Simple Mitigation Strategy for a Systematic Gate Error in IBMQ
%A Daniel Bultrini
%A Max Hunter Gordon
%A Esperanza L¨®pez
%A Germ¨¢n Sierra
%J Journal of Applied Mathematics and Physics
%P 1215-1229
%@ 2327-4379
%D 2021
%I Scientific Research Publishing
%R 10.4236/jamp.2021.96083
%X In this paper, we report the observation and characterisation of a systematic error in the implementation of <em>U</em><sub>3</sub> gates in the IBM quantum computers. By measuring the effect of this gate for various rotation angles the error appears as an over-rotation, whose magnitude does not correlate with IBM¡¯s cited errors calculated using Clifford randomized benchmarking. We propose a simple mitigation procedure to limit the effects of this error. We show that using a simple mitigation strategy one can obtain improved results in the observed value for the CHSH inequality, measured in a cloud-based quantum computer. This work highlights the utility of simple mitigation strategies for short-depth quantum circuits.
%K Quantum Computing
%K Error Mitigation
%K CHSH Inequalities
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=109835