Pith Number

pith:MZ447KJA

pith:2011:MZ447KJA2H6JEY333CGOM2PBDD

not attested not anchored not stored refs pending

Probing Planck-scale physics with quantum optics

Caslav Brukner, Igor Pikovski, Markus Aspelmeyer, Michael R. Vanner, Myungshik Kim

arxiv:1111.1979 v2 · 2011-11-08 · quant-ph · gr-qc · hep-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MZ447KJA2H6JEY333CGOM2PBDD}

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	2026-05-18T03:54:15.928638Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6679cfa920d1fc92637bd88ce669e118c4675f25e41df34d2684aecdab7c7a26

Aliases

arxiv: 1111.1979 · arxiv_version: 1111.1979v2 · doi: 10.48550/arxiv.1111.1979 · pith_short_12: MZ447KJA2H6J · pith_short_16: MZ447KJA2H6JEY33 · pith_short_8: MZ447KJA

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/MZ447KJA2H6JEY333CGOM2PBDD \
  | 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: 6679cfa920d1fc92637bd88ce669e118c4675f25e41df34d2684aecdab7c7a26

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "478cce0ac60a4dc5e560974c811450903457cd0cb93783b606ef645515dec205",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2011-11-08T17:16:07Z",
    "title_canon_sha256": "76781ae2e952322511bccb20902adecffc1bd32bf45bad566132f784dab531b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.1979",
    "kind": "arxiv",
    "version": 2
  }
}