Pith Number

pith:2RASFK57

pith:2012:2RASFK57V33QHTJKMQN2DL3UAL

not attested not anchored not stored refs pending

How long can it take for a quantum channel to forget everything?

Andre Ahlbrecht, Florian Richter, Reinhard F. Werner

arxiv:1205.0693 v1 · 2012-05-03 · 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{2RASFK57V33QHTJKMQN2DL3UAL}

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	2026-05-18T03:56:25.242488Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d44122abbfaef703cd2a641ba1af7402c3a32d014717742c94210d1f99c0af3b

Aliases

arxiv: 1205.0693 · arxiv_version: 1205.0693v1 · doi: 10.48550/arxiv.1205.0693 · pith_short_12: 2RASFK57V33Q · pith_short_16: 2RASFK57V33QHTJK · pith_short_8: 2RASFK57

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/2RASFK57V33QHTJKMQN2DL3UAL \
  | 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: d44122abbfaef703cd2a641ba1af7402c3a32d014717742c94210d1f99c0af3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bf48adb004ff796299be84b955eded1b77de20ca67118cafbaf246f702361c9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-05-03T12:24:48Z",
    "title_canon_sha256": "1773ecaa51d2f15474b41969424fae5f8a14f810e1419256ab9618b2b36f1f1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.0693",
    "kind": "arxiv",
    "version": 1
  }
}