Pith Number

pith:INXPENX7

pith:2026:INXPENX76OS7TTTJAEA3DQ5NHU

not attested not anchored not stored refs pending

Low Latency GNN Accelerator for Quantum Error Correction

Alessio Cicero, Luigi Altamura, Mats Granath, Moritz Lange, Pedro Trancoso

An FPGA accelerator for a graph neural network decoder performs quantum error correction in under one microsecond with lower error rates than prior methods for surface codes up to distance 7.

arxiv:2603.22149 v3 · 2026-03-23 · quant-ph · cs.AR

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\pithnumber{INXPENX76OS7TTTJAEA3DQ5NHU}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

the FPGA-based decoder achieving a latency smaller than 1μs, with a lower error rate compared to the state-of-the-art for code distance up to d=7

C2weakest assumption

That hardware-aware optimizations applied to the GNN decoder preserve its accuracy sufficiently to outperform prior decoders while meeting the strict 1us timing constraint imposed by superconducting qubit coherence times.

C3one line summary

An FPGA-accelerated GNN decoder for surface-code quantum error correction delivers sub-1us latency and lower error rates than state-of-the-art approaches for code distances up to 7.

Cited by

1 paper in Pith

Low-Overhead Error-Corrected QCNNs Using Bivariate Bicycle Codes

Receipt and verification

First computed	2026-07-09T01:19:53.229653Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

436ef236fff3a5f9ce690101b1c3ad3d11d43a2e3b2cb4d54a0c8ac10a083684

Aliases

arxiv: 2603.22149 · arxiv_version: 2603.22149v3 · doi: 10.48550/arxiv.2603.22149 · pith_short_12: INXPENX76OS7 · pith_short_16: INXPENX76OS7TTTJ · pith_short_8: INXPENX7

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/INXPENX76OS7TTTJAEA3DQ5NHU \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 436ef236fff3a5f9ce690101b1c3ad3d11d43a2e3b2cb4d54a0c8ac10a083684

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "801a7a314998685d204ae067f8e00094561f43305fa69b3bc221e003a761cdea",
    "cross_cats_sorted": [
      "cs.AR"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-03-23T16:14:52Z",
    "title_canon_sha256": "dc3f6af4bae434728ff432853bf22b1a5fa7ef03fbaed32f943acc47306c1e70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.22149",
    "kind": "arxiv",
    "version": 3
  }
}