Pith Number

pith:FVWPHQKG

pith:1999:FVWPHQKG6KG2IPHSCNQYU4MEAQ

not attested not anchored not stored refs pending

Improving Detectors Using Entangling Quantum Copiers

P. Deuar, W. J. Munro

arxiv:quant-ph/9911103 v1 · 1999-11-24 · 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{FVWPHQKG6KG2IPHSCNQYU4MEAQ}

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	2026-07-04T16:16:27.529052Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d6cf3c146f28da43cf213618a7184041bce28529ab3b6d1a35d46e68921b19c

Aliases

arxiv: quant-ph/9911103 · arxiv_version: quant-ph/9911103v1 · doi: 10.48550/arxiv.quant-ph/9911103 · pith_short_12: FVWPHQKG6KG2 · pith_short_16: FVWPHQKG6KG2IPHS · pith_short_8: FVWPHQKG

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/FVWPHQKG6KG2IPHSCNQYU4MEAQ \
  | 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: 2d6cf3c146f28da43cf213618a7184041bce28529ab3b6d1a35d46e68921b19c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af18ebc984111df87fefc7111ed228088af672079c675245ed8c6fca60428a0f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1999-11-24T06:29:35Z",
    "title_canon_sha256": "883906346b2958acdd6a90efc045d5bf9b31f8c6de3a9c669c0549d8b17e1f44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9911103",
    "kind": "arxiv",
    "version": 1
  }
}