Pith Number

pith:YX6NEGLN

pith:2026:YX6NEGLNERJI4D4WC2AVBHW2L6

not attested not anchored not stored refs pending

Scalable quantum error correction tailored for a heavy-hex qubit array

Benjamin J. Brown, Campbell K. McLauchlan, Evan T. Hockings, Georgia M. Nixon, Jun Zen, Robin Harper, Seok-Hyung Lee, Stephen D. Bartlett, Thomas R. Scruby, Xanda C. Kolesnikow

A dynamic compass code on heavy-hex hardware cuts logical errors by up to 38.3 percent with noise-informed decoding.

arxiv:2604.14296 v2 · 2026-04-15 · quant-ph

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YX6NEGLNERJI4D4WC2AVBHW2L6}

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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

Our noise-informed approach yields up to 38.3% improvement in the logical error rate of a distance-5 implementation of the dynamic compass code in experiment.

C2weakest assumption

The assumption that ACES provides accurate context-dependent error rates for the full syndrome extraction cycle and that post-selection to exclude leakage events does not introduce unacceptable bias into the reported logical error rates.

C3one line summary

The dynamic compass code achieves competitive thresholds on heavy-hex lattices with an experimental distance-5 implementation showing up to 38.3% logical error rate reduction through noise-informed decoding using ACES and soft information.

Receipt and verification

First computed	2026-05-21T01:05:19.178447Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5fcd2196d24528e0f961681509eda5fb8699dbea8464d4ac5ad390af2f71b8e

Aliases

arxiv: 2604.14296 · arxiv_version: 2604.14296v2 · doi: 10.48550/arxiv.2604.14296 · pith_short_12: YX6NEGLNERJI · pith_short_16: YX6NEGLNERJI4D4W · pith_short_8: YX6NEGLN

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/YX6NEGLNERJI4D4WC2AVBHW2L6 \
  | 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: c5fcd2196d24528e0f961681509eda5fb8699dbea8464d4ac5ad390af2f71b8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ba225d5fe529634580274f1c75277fedd50f73637a9efb733b62ee0353d3397",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-04-15T18:00:21Z",
    "title_canon_sha256": "30af1744d41c0f8082526d743670d369280a3b45c0d9d05fc18eff9f6ec0b3e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.14296",
    "kind": "arxiv",
    "version": 2
  }
}