Pith Number

pith:QA3V5XDY

pith:2009:QA3V5XDY3OBQJJS3KY7ZN2C6RW

not attested not anchored not stored refs pending

Improving zero-error classical communication with entanglement

Andreas Winter, Debbie Leung, Toby S. Cubitt, William Matthews

arxiv:0911.5300 v2 · 2009-11-27 · quant-ph · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QA3V5XDY3OBQJJS3KY7ZN2C6RW}

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	2026-05-18T04:38:07.930968Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80375edc78db8304a65b563f96e85e8d821b21481b94dfc0c8027e719ecbe74e

Aliases

arxiv: 0911.5300 · arxiv_version: 0911.5300v2 · doi: 10.48550/arxiv.0911.5300 · pith_short_12: QA3V5XDY3OBQ · pith_short_16: QA3V5XDY3OBQJJS3 · pith_short_8: QA3V5XDY

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/QA3V5XDY3OBQJJS3KY7ZN2C6RW \
  | 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: 80375edc78db8304a65b563f96e85e8d821b21481b94dfc0c8027e719ecbe74e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e954ebb25acde6c29bf8e9e22545387c45b0b39b455b5cf9e7ba162489958255",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-11-27T16:45:00Z",
    "title_canon_sha256": "e0d8125c43b0c1b2e6b36a1e2ee1442d34dc9d01d277c681d1902bc66ec66166"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.5300",
    "kind": "arxiv",
    "version": 2
  }
}