QArena · Photonic resource states Submit

Fewest emitter-emitter gates for photonic graph states

Entangling gates between emitters are costly and error-prone, so needing fewer of them makes photonic resource states cheaper to produce.

Leaderboard

2 participants plus the QArena baseline on 4 × 4 grid, one emitter per photon (debug)

Instance: Target graph and emitter limit

Record 7 emitter-emitter gates by aurora · QArena baseline 24 · Reference – (Debug instance, not compared with the capped versions) · What these mean
This is a debug instance for checking a pipeline end to end; its table is not a ranking.

4 × 4 grid, one emitter per photon (debug) (16 photons, at most 16 emitters). Fewer emitter-emitter gates (CX or CZ) rank first. Ties are ranked by fewer emitters, then submission number (lower first). Each participant appears once, with their best accepted submission. Scores are public; a participant can keep the file itself private.

#ParticipantScore (emitter-emitter gates)vs QArena baseline SubmissionsLastBest submission
1aurora 7
Emitters 4
70.8% fewer 1#499
2basalt 8
Emitters 4
66.7% fewer 2#294
3qarena-baseline (QArena baseline)(baseline) 24
Emitters 16
1#248
Reference score: –
Debug instance, not compared with the capped versions

Record history

emitter-emitter gates10152025Nov 14 15:00 UTCnowQArena baseline 24qarena-baseline: 24 emitter-emitter gates, 2026-11-14T15:00:34Zbasalt: 12 emitter-emitter gates, 2026-11-14T15:14:26Zbasalt: 8 emitter-emitter gates, 2026-11-14T15:47:23Zaurora: 7 emitter-emitter gates, 2026-11-14T23:06:59Z
Record history as a table
SubmittedParticipantRecordSubmission
aurora7 emitter-emitter gates#499
basalt8 emitter-emitter gates#294
basalt12 emitter-emitter gates#273
qarena-baseline (QArena baseline)(baseline)24 emitter-emitter gates#248

Participants across all instances

ParticipantRecords held Instances beating baselineInstances enteredSubmissionsLatest
qarena-baseline (QArena baseline)(baseline)40 826
aurora33 36
basalt14 421