Pith Number

pith:PMSGEUWX

pith:2014:PMSGEUWXPZ26E657MNHULIDCY3

not attested not anchored not stored refs pending

Maximum possible fidelity in $1\rightarrow 2$ qubits cloning

A. Sinha Roy, D. Gangopadhyay

arxiv:1405.5529 v4 · 2014-05-21 · 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{PMSGEUWXPZ26E657MNHULIDCY3}

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	2026-05-18T01:32:01.251072Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b246252d77e75e27bbf634f45a062c6d1eea78e9fd52362bc5fc2ed0ddfbd3b

Aliases

arxiv: 1405.5529 · arxiv_version: 1405.5529v4 · doi: 10.48550/arxiv.1405.5529 · pith_short_12: PMSGEUWXPZ26 · pith_short_16: PMSGEUWXPZ26E657 · pith_short_8: PMSGEUWX

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/PMSGEUWXPZ26E657MNHULIDCY3 \
  | 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: 7b246252d77e75e27bbf634f45a062c6d1eea78e9fd52362bc5fc2ed0ddfbd3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d345f8425e2ebcebca5febb06bd9598ab1f378529c3dd03544c4ce11e7becd8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2014-05-21T08:27:55Z",
    "title_canon_sha256": "d51df0218036b54a16c1a9a5d17415e600f9deb8090ba9f47bf732e63ac8e371"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.5529",
    "kind": "arxiv",
    "version": 4
  }
}