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000572871 245__ $$aMeasurement error mitigation in quantum computers through classical bit-flip correction
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000572871 520__ $$aWe develop a classical bit-flip correction method to mitigate measurement errors on quantum computers. This method can be applied to any operator, any number of qubits, and any realistic bit-flip probability. We first demonstrate the successful performance of this method by correcting the noisy measurements of the ground-state energy of the longitudinal Ising model. We then generalize our results to arbitrary operators and test our method both numerically and experimentally on IBM quantum hardware. As a result, our correction method reduces the measurement error on the quantum hardware by up to one order of magnitude. We finally discuss how to preprocess the method and extend it to other error sources beyond measurement errors. For local Hamiltonians, the overhead costs are polynomial in the number of qubits, even if multiqubit correlations are included.
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000572871 7001_ $$aHartung, Tobias$$b1
000572871 7001_ $$0P:(DE-H253)PIP1003636$$aJansen, Karl$$b2
000572871 7001_ $$aKühn, Stefan$$b3
000572871 7001_ $$0P:(DE-H253)PIP1083971$$aStornati, Paolo$$b4$$udesy
000572871 7001_ $$0Xiao.Yang.Wang.1$$aWang, Xiaoyang$$b5
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000572871 7870_ $$0PUBDB-2021-02146$$aFuncke, Lena et.al.$$d2020$$iIsParent$$rarXiv:2007.03663 ; HU-EP-20/15 ; DESY-20-147$$tMeasurement Error Mitigation in Quantum Computers Through Classical Bit-Flip Correction
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