Table 1 Observed mean and maximum suppression factors \(\boldsymbol{\bar{\eta }}\) and \(\max (\eta )\) (equation (1)) across the RG problems studied in Fig. 1 and the CB problems studied in Fig. 3, for all error-mitigation methods studied
From: Purification-based quantum error mitigation of pair-correlated electron simulations
System | Metric | PS-VQE | EV | PS-VD |
|---|---|---|---|---|
RG (ten qubits, energy) | \({\bar{\eta }}_{E}\) | 2.1 | 86 | 54 |
\(\max ({\eta }_{E})\) | 2.5 | 460 | 120 | |
RG (ten qubits, order parameter) | \({\bar{\eta }}_{{{\Delta }}}\) | 1.6 | 32 | 18 |
\(\max ({\eta }_{{{\Delta }}})\) | 1.9 | 56 | 51 | |
CB (six qubits, energy) | \({\bar{\eta }}_{E}\) | 5.0 | 54 | – |
\(\max ({\eta }_{E})\) | 5.2 | 140 | – | |
CB (ten qubits, energy) | \({\bar{\eta }}_{E}\) | 2.9 | 38 | – |
\(\max ({\eta }_{E})\) | 3.0 | 190 | – |
