Pith Number

pith:LQDGPBNW

pith:1997:LQDGPBNWTFXLVRWYY7MJBT2GYF

not attested not anchored not stored refs pending

Ensemble versus individual system in quantum optics

Gerhard C. Hegerfeldt

arxiv:quant-ph/9710027 v1 · 1997-10-08 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LQDGPBNWTFXLVRWYY7MJBT2GYF}

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	2026-05-18T01:37:53.062636Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c066785b6996ebac6d8c7d890cf46c15cffd8f194d3703209e5876358508c90

Aliases

arxiv: quant-ph/9710027 · arxiv_version: quant-ph/9710027v1 · doi: 10.48550/arxiv.quant-ph/9710027 · pith_short_12: LQDGPBNWTFXL · pith_short_16: LQDGPBNWTFXLVRWY · pith_short_8: LQDGPBNW

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/LQDGPBNWTFXLVRWYY7MJBT2GYF \
  | 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: 5c066785b6996ebac6d8c7d890cf46c15cffd8f194d3703209e5876358508c90

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6e4e7828311f4db20f1cd4f97e6bdcac8ffe8905ab6e8159fb6ef6e3f418b52",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1997-10-08T09:47:59Z",
    "title_canon_sha256": "92009b5c04f977fd488ef39143cffb998274ca78fcd149a019818bc06d256a53"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9710027",
    "kind": "arxiv",
    "version": 1
  }
}