Pith Number

pith:SMHMU3H2

pith:2006:SMHMU3H2WQKCXOFD4Y7CDONDIO

not attested not anchored not stored refs pending

Black holes are almost optimal quantum cloners

C. Adami, G. Ver Steeg

arxiv:quant-ph/0601065 v3 · 2006-01-11 · quant-ph · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SMHMU3H2WQKCXOFD4Y7CDONDIO}

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	2026-05-18T02:05:22.064948Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

930eca6cfab4142bb8a3e63e21b9a343aaa5bfc761444e4c19f3a6590320619e

Aliases

arxiv: quant-ph/0601065 · arxiv_version: quant-ph/0601065v3 · doi: 10.48550/arxiv.quant-ph/0601065 · pith_short_12: SMHMU3H2WQKC · pith_short_16: SMHMU3H2WQKCXOFD · pith_short_8: SMHMU3H2

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/SMHMU3H2WQKCXOFD4Y7CDONDIO \
  | 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: 930eca6cfab4142bb8a3e63e21b9a343aaa5bfc761444e4c19f3a6590320619e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "46ccfc389446a43e4a42cd21134bc7d2fb34ba96ed37934d92b55b349c84bd34",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2006-01-11T07:53:50Z",
    "title_canon_sha256": "f1101c97ecf49d37e490fbab4bacb80817c0d8d281e04e896575a692ae0525c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0601065",
    "kind": "arxiv",
    "version": 3
  }
}