Pith Number

pith:4SQPYWIP

pith:2012:4SQPYWIPPRLJY2Y5ZUTXWVMUNA

not attested not anchored not stored refs pending

Enhancing quantum entanglement by photon addition and subtraction

Carlos Navarrete-Benlloch, Jeffrey H. Shapiro, Nicolas J. Cerf, Ra\'ul Garc\'ia-Patr\'on

arxiv:1201.4120 v2 · 2012-01-19 · quant-ph · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4SQPYWIPPRLJY2Y5ZUTXWVMUNA}

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	2026-05-18T03:48:13.593663Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4a0fc590f7c569c6b1dcd277b55946816da9bb2b3ae236d19ffa54913a15354

Aliases

arxiv: 1201.4120 · arxiv_version: 1201.4120v2 · doi: 10.48550/arxiv.1201.4120 · pith_short_12: 4SQPYWIPPRLJ · pith_short_16: 4SQPYWIPPRLJY2Y5 · pith_short_8: 4SQPYWIP

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/4SQPYWIPPRLJY2Y5ZUTXWVMUNA \
  | 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: e4a0fc590f7c569c6b1dcd277b55946816da9bb2b3ae236d19ffa54913a15354

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b9ecb27f251168ff217e75e4435c06d43784a02f2e9282c377a40c9d1f3f2977",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-01-19T17:42:44Z",
    "title_canon_sha256": "107b1596adf3940396390941e0a9f05cda9f3828db0fc36bc2c21607c468708b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4120",
    "kind": "arxiv",
    "version": 2
  }
}