Pith Number

pith:QMEDPORI

pith:2013:QMEDPORI6K3BKIUL5E3DJ64CNT

not attested not anchored not stored refs pending

Direct measurement of the biphoton Wigner function through two-photon interference

Andreas Eckstein (MPQ), Antonio Z. Khoury (UFF), Arne Keller (ISMO), P\'erola Milman (MPQ), Sara Ducci (MPQ), Stephen P. Walborn (UFRJ), Thomas Coudreau (MPQ), Tom Douce (MPQ)

arxiv:1304.7092 v2 · 2013-04-26 · 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{QMEDPORI6K3BKIUL5E3DJ64CNT}

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	2026-05-18T03:12:11.729037Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

830837ba28f2b615228be93634fb826cd6d4ea6f9587840ef7f1a49c1694c5a0

Aliases

arxiv: 1304.7092 · arxiv_version: 1304.7092v2 · doi: 10.48550/arxiv.1304.7092 · pith_short_12: QMEDPORI6K3B · pith_short_16: QMEDPORI6K3BKIUL · pith_short_8: QMEDPORI

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/QMEDPORI6K3BKIUL5E3DJ64CNT \
  | 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: 830837ba28f2b615228be93634fb826cd6d4ea6f9587840ef7f1a49c1694c5a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee1e9d331f80f5bf5b76bcd83db2c1f8df3a2e41271186095f05aa5dca22a424",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-04-26T08:41:20Z",
    "title_canon_sha256": "698b293805a549a368acd57f92989cfc4902ebe736cc0ed30c8e02605daa2292"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.7092",
    "kind": "arxiv",
    "version": 2
  }
}