Pith Number

pith:C7Y7A4NU

pith:2015:C7Y7A4NU7CLSZ54C6KAQ3EQJKN

not attested not anchored not stored refs pending

How long does it take to obtain a physical density matrix?

Christian Schwemmer, G\'eza T\'oth, Harald Weinfurter, Jonas Reuter, Lukas Knips, Nico Klein

arxiv:1512.06866 v1 · 2015-12-21 · 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{C7Y7A4NU7CLSZ54C6KAQ3EQJKN}

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	2026-05-18T01:23:53.584838Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17f1f071b4f8972cf782f2810d9209534f7f55b9b00394556bb5e19d81d2742c

Aliases

arxiv: 1512.06866 · arxiv_version: 1512.06866v1 · doi: 10.48550/arxiv.1512.06866 · pith_short_12: C7Y7A4NU7CLS · pith_short_16: C7Y7A4NU7CLSZ54C · pith_short_8: C7Y7A4NU

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/C7Y7A4NU7CLSZ54C6KAQ3EQJKN \
  | 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: 17f1f071b4f8972cf782f2810d9209534f7f55b9b00394556bb5e19d81d2742c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b1c445fd30cc5a181bbcf9baacf950e88206b8f44641e104ff4989c59dcf6d8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-12-21T21:02:42Z",
    "title_canon_sha256": "bcbc8aee88ca2e339cb5e538068b85cdcd50794294b6214d4ef11af9335cbaa9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.06866",
    "kind": "arxiv",
    "version": 1
  }
}