Pith Number

pith:YYKUBZWU

pith:2019:YYKUBZWUTFU437PWDIKOLHQA7F

not attested not anchored not stored refs pending

Echo-Based Quantum Memory

B. C. Buchler, G. T. Campbell, K. R. Ferguson, M. J. Sellars, P. K. Lam

arxiv:1902.04313 v1 · 2019-02-12 · quant-ph · physics.optics

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YYKUBZWUTFU437PWDIKOLHQA7F}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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.

Receipt and verification

First computed	2026-05-17T23:54:12.589637Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c61540e6d49969cdfdf61a14e59e00f9539656b13765cf6dbe38cb3409f40161

Aliases

arxiv: 1902.04313 · arxiv_version: 1902.04313v1 · doi: 10.48550/arxiv.1902.04313 · pith_short_12: YYKUBZWUTFU4 · pith_short_16: YYKUBZWUTFU437PW · pith_short_8: YYKUBZWU

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/YYKUBZWUTFU437PWDIKOLHQA7F \
  | 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: c61540e6d49969cdfdf61a14e59e00f9539656b13765cf6dbe38cb3409f40161

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e272d158454f6ecd4f41bba594fa76f2c62a2a6c9c08e059ad65faf97027fea5",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-02-12T10:11:44Z",
    "title_canon_sha256": "05271f1faa177795a029a22135b914ffe5a7ead2de8ad9c40cadf258ab0c1e91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.04313",
    "kind": "arxiv",
    "version": 1
  }
}