Distributing a quantum circuit's shots across multiple QPUs and merging with reliability-based weights reduces variance and worst-case error compared with single-QPU execution, at the cost of not beating the best QPU.
Furthermore, the results of the calibration stage, if available, can be integrated into the analysis as expected prior accuracy provided by each QPU
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Distributing Quantum Computations, Shot-wise
Distributing a quantum circuit's shots across multiple QPUs and merging with reliability-based weights reduces variance and worst-case error compared with single-QPU execution, at the cost of not beating the best QPU.