Pith Number

pith:SQVJYUWX

pith:2009:SQVJYUWX2Y4LLPI4J3EPMTF7HR

not attested not anchored not stored refs pending

Experimental estimation of entanglement at the quantum limit

Alex Shurupov, Alice Meda, Angela Florio, Giorgio Brida, Ivo Degiovanni, Marco Genovese, Matteo G. A. Paris, Paolo Giorda

arxiv:0907.4117 v1 · 2009-07-23 · 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{SQVJYUWX2Y4LLPI4J3EPMTF7HR}

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	2026-05-18T02:12:54.221750Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

942a9c52d7d638b5bd1c4ec8f64cbf3c5d62741e3583427d9f47799e83029953

Aliases

arxiv: 0907.4117 · arxiv_version: 0907.4117v1 · doi: 10.48550/arxiv.0907.4117 · pith_short_12: SQVJYUWX2Y4L · pith_short_16: SQVJYUWX2Y4LLPI4 · pith_short_8: SQVJYUWX

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/SQVJYUWX2Y4LLPI4J3EPMTF7HR \
  | 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: 942a9c52d7d638b5bd1c4ec8f64cbf3c5d62741e3583427d9f47799e83029953

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e68aaaa846e2f56e04ab989a00d3f4e0c6b43c9e18e17fb7912094f2fee6384f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-07-23T16:41:05Z",
    "title_canon_sha256": "b17eddae6710c3f78afe8c09f54ba4b8a652f263946e0ab68779e34e5ba2da7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4117",
    "kind": "arxiv",
    "version": 1
  }
}