Pith Number

pith:3P62MSEY

pith:2012:3P62MSEYSSBA7YBEDUSHDMUSTU

not attested not anchored not stored refs pending

Biphoton ququarts as either pure or mixed states, features and reconstruction from coincidence measurements

Mikhail Fedorov

arxiv:1209.3705 v1 · 2012-09-17 · 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{3P62MSEYSSBA7YBEDUSHDMUSTU}

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	2026-05-18T01:54:27.341365Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dbfda6489894820fe0241d2471b2929d141e1c3ab629616234aea669a494c9ed

Aliases

arxiv: 1209.3705 · arxiv_version: 1209.3705v1 · doi: 10.48550/arxiv.1209.3705 · pith_short_12: 3P62MSEYSSBA · pith_short_16: 3P62MSEYSSBA7YBE · pith_short_8: 3P62MSEY

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/3P62MSEYSSBA7YBEDUSHDMUSTU \
  | 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: dbfda6489894820fe0241d2471b2929d141e1c3ab629616234aea669a494c9ed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38aadfceda725edac70033eb2755b73ce771ef44d615145c1a576bb417e121a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-09-17T16:07:40Z",
    "title_canon_sha256": "be8b9903a01dcb3197a229816faa028e323623bd26380cb53b6f93bb63a52910"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.3705",
    "kind": "arxiv",
    "version": 1
  }
}