Theoretically, the success rate of Mermin-Peres magic, a 4-qubit application using quantum entanglement, is 100%. When this was executed on ibm_torino (Heron r1), the success rate was 92% due to errors caused by noise. This is a big improvement from the 86% success rate on ibm_brisbane (Eagle r3) a while ago. The reason for this is that the error rate was 14% on ibm_brisbane, but was reduced to 7.9% on ibm_torino. Figure 1 shows the details.
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