Pith Number

pith:BYZ6OWMO

pith:2009:BYZ6OWMOWP5ZWI5AMRHQN5M4A2

not attested not anchored not stored refs pending

Limitations of Passive Protection of Quantum Information

Alastair Kay, Fernando Pastawski, Ignacio Cirac, Norbert Schuch

arxiv:0911.3843 v1 · 2009-11-19 · 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{BYZ6OWMOWP5ZWI5AMRHQN5M4A2}

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	2026-05-18T04:39:16.751762Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e33e7598eb3fb9b23a0644f06f59c06b4e2c3d2e66d486bc498c00e5c251522

Aliases

arxiv: 0911.3843 · arxiv_version: 0911.3843v1 · doi: 10.48550/arxiv.0911.3843 · pith_short_12: BYZ6OWMOWP5Z · pith_short_16: BYZ6OWMOWP5ZWI5A · pith_short_8: BYZ6OWMO

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/BYZ6OWMOWP5ZWI5AMRHQN5M4A2 \
  | 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: 0e33e7598eb3fb9b23a0644f06f59c06b4e2c3d2e66d486bc498c00e5c251522

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "182a15c364e81e496be2ee4749dc6a28846d1593ee9c67ac2e7dc78332682c15",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-11-19T17:10:03Z",
    "title_canon_sha256": "4d6f240e0ce697c889c9b43b3eefc868e8fbf87b760dce2676aaf54c5ef0248b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.3843",
    "kind": "arxiv",
    "version": 1
  }
}