Pith Number

pith:LB7KGUVY

pith:2000:LB7KGUVYR5FT6CYHLAB2S5WSPC

not attested not anchored not stored refs pending

Quantum copying can increase the practically available information

P. Deuar, W. J. Munro

arxiv:quant-ph/0008032 v1 · 2000-08-06 · 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{LB7KGUVYR5FT6CYHLAB2S5WSPC}

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	2026-07-04T16:22:24.623265Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

587ea352b88f4b3f0b075803a976d278a748a3b83df6fa9b323c53c97ca900cd

Aliases

arxiv: quant-ph/0008032 · arxiv_version: quant-ph/0008032v1 · doi: 10.48550/arxiv.quant-ph/0008032 · pith_short_12: LB7KGUVYR5FT · pith_short_16: LB7KGUVYR5FT6CYH · pith_short_8: LB7KGUVY

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/LB7KGUVYR5FT6CYHLAB2S5WSPC \
  | 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: 587ea352b88f4b3f0b075803a976d278a748a3b83df6fa9b323c53c97ca900cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b8141e6206f73225adf0cbb673125d8f8f1ae3cf088c4a50b9585ce3286feb0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2000-08-06T23:50:14Z",
    "title_canon_sha256": "26d31e33823faed65cde36cce21243692754f63ffa89f1b29bdca0626432c190"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0008032",
    "kind": "arxiv",
    "version": 1
  }
}