Pith Number

pith:4MWTDSFO

pith:2014:4MWTDSFOMFRU7IGJB3UQPHMA4Y

not attested not anchored not stored refs pending

Quantum-enhanced tomography of unitary processes

Hugo Cable, Jeremy L. O'Brien, Jonathan C.F. Matthews, Peter Shadbolt, Rebecca Whittaker, Xiao-Qi Zhou

arxiv:1402.2897 v1 · 2014-02-12 · 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{4MWTDSFOMFRU7IGJB3UQPHMA4Y}

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	2026-05-18T02:03:48.530229Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e32d31c8ae61634fa0c90ee9079d80e62391df0066139454f6dd4f12df898164

Aliases

arxiv: 1402.2897 · arxiv_version: 1402.2897v1 · doi: 10.48550/arxiv.1402.2897 · pith_short_12: 4MWTDSFOMFRU · pith_short_16: 4MWTDSFOMFRU7IGJ · pith_short_8: 4MWTDSFO

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/4MWTDSFOMFRU7IGJB3UQPHMA4Y \
  | 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: e32d31c8ae61634fa0c90ee9079d80e62391df0066139454f6dd4f12df898164

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4979f04bbb5af60aaf1db87adc3c616ecd3312b1fb3a9029bcb85b9a4bb8c34",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2014-02-12T16:58:45Z",
    "title_canon_sha256": "287ef201535a6fdc0fb15b27c402bb340411b7af83a81b1589172aebb5d69bd3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.2897",
    "kind": "arxiv",
    "version": 1
  }
}