Pith Number

pith:N7AFDDNZ

pith:2013:N7AFDDNZJTWJQZJZMHJPDQK46Y

not attested not anchored not stored refs pending

Extracting information from a qubit by multiple observers: Toward a theory of sequential state discrimination

Edgar Feldman, Janos Bergou, Mark Hillery

arxiv:1305.4290 v2 · 2013-05-18 · 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{N7AFDDNZJTWJQZJZMHJPDQK46Y}

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	2026-05-18T01:49:49.040142Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6fc0518db94cec98653961d2f1c15cf63d8682920fab1da1620b97e5550bc109

Aliases

arxiv: 1305.4290 · arxiv_version: 1305.4290v2 · doi: 10.48550/arxiv.1305.4290 · pith_short_12: N7AFDDNZJTWJ · pith_short_16: N7AFDDNZJTWJQZJZ · pith_short_8: N7AFDDNZ

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/N7AFDDNZJTWJQZJZMHJPDQK46Y \
  | 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: 6fc0518db94cec98653961d2f1c15cf63d8682920fab1da1620b97e5550bc109

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "929c0915e6dd8b0647d522b52411777143eeee275072d8fed41be89664cfb5bc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-05-18T18:50:31Z",
    "title_canon_sha256": "c9a76c50f7de1f1c3e78b6fd73e3568063869281a0ab0e37926af482995ecf47"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.4290",
    "kind": "arxiv",
    "version": 2
  }
}