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(A12) Note that N (i) 2 is supposed to be an odd number to ensure that the sign is determined

Computation of E[ˆsi] Given N (i) 2 measurements for estimating the sign, the expectation value of ˆsi reads E [ˆsi] = 1 − 2 N (i) 2 −1 2X m=0 N (i) 2 m pm i (1 − pi)N (i) 2 −m, (A

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Quantum expectation value estimation by doubling the number of qubits

quant-ph · 2024-12-19 · conditional · novelty 4.0

Bell sampling on two copies of a quantum state beats standard qubit-wise-commuting grouping for molecular energy estimates when the required accuracy is only tens of milli-Hartree or rougher, based on numerics up to 12 qubits.

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  • Quantum expectation value estimation by doubling the number of qubits quant-ph · 2024-12-19 · conditional · none · ref 3

    Bell sampling on two copies of a quantum state beats standard qubit-wise-commuting grouping for molecular energy estimates when the required accuracy is only tens of milli-Hartree or rougher, based on numerics up to 12 qubits.