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

1 participant plus the QArena baseline on Binary tree, depth 4, one emitter per photon (debug)

Instance: Target graph and emitter limit

Record 4 emitter-emitter gates by basalt · QArena baseline 30 · 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.

Binary tree, depth 4, one emitter per photon (debug) (31 photons, at most 31 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
1basalt 4
Emitters 2
86.7% fewer 1#282
2qarena-baseline (QArena baseline)(baseline) 30
Emitters 31
1#266
Reference score: –
Debug instance, not compared with the capped versions

Record history

emitter-emitter gates102030Nov 14 15:01 UTCnowQArena baseline 30qarena-baseline: 30 emitter-emitter gates, 2026-11-14T15:01:14Zbasalt: 4 emitter-emitter gates, 2026-11-14T15:14:28Z
Record history as a table
SubmittedParticipantRecordSubmission
basalt4 emitter-emitter gates#282
qarena-baseline (QArena baseline)(baseline)30 emitter-emitter gates#266

Participants across all instances

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