QArena · Measurement and tomography
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Fewest Pauli measurement settings that cover every 3- or 4-qubit observable
Estimating every low-weight Pauli observable of a many-qubit device (overlapping tomography) needs product measurement settings that cover every pattern on every small set of qubits, and each setting is a separate device configuration.
Instance: Qubits and strength (size of the qubit sets to cover)
Record 608 settings by aurora · QArena baseline 633 · Reference 633 (Best published array as of 2026-11-14 (a table that changes weekly; 630 listed for 94 qubits), checked here) · What these mean
100 qubits, strength 4 (every observable on every 4 of 100 qubits; at most 1,024 settings). Fewer settings rank first. Equal counts are tied and ranked by submission number (lower first). Each participant appears once, with their best accepted submission. Scores are public; a participant can keep the file itself private.
| # | Participant | Score (settings) | vs QArena baseline | Submissions | Last | Best submission |
|---|---|---|---|---|---|---|
| 1 | aurora | 608 | 3.9% fewer | 3 | #624 | |
| 2 | qarena-baseline (QArena baseline)(baseline) | 633 | 1 | #613 |
Reference score: 633
Best published array as of 2026-11-14 (a table that changes weekly; 630 listed for 94 qubits), checked here, ca-tools covering-array table, CA(633; 4, 100, 3)
Record history
Participants across all instances
| Participant | Records held | Instances beating baseline | Instances entered | Submissions | Latest |
|---|---|---|---|---|---|
| aurora | 1 | 1 | 1 | 3 | |
| qarena-baseline (QArena baseline)(baseline) | 1 | 0 | 2 | 4 |