Quantum ensemble engineering aligns sampling weights with operator sign structures via basis-resolved correlator reformulation and specialized circuits, exposing suppressed contributions in infinite-temperature correlation functions on IBM processors up to 20 qubits.
Kandalaet al., Hardware-efficient variational quan- tum eigensolver for small molecules and quantum mag- nets, Nature549, 242 (2017)
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Ensemble Engineering to Overcome Destructive Cancellation in Quantum Measurements
Quantum ensemble engineering aligns sampling weights with operator sign structures via basis-resolved correlator reformulation and specialized circuits, exposing suppressed contributions in infinite-temperature correlation functions on IBM processors up to 20 qubits.