Pith Number

pith:CBEJODB5

pith:2005:CBEJODB5LQOCBIGQGC3K4XF5SO

not attested not anchored not stored refs pending

Popper's test of quantum mechanics and two-photon "ghost" diffraction

A. Bramon, R. Escribano

arxiv:quant-ph/0507040 v2 · 2005-07-04 · quant-ph · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CBEJODB5LQOCBIGQGC3K4XF5SO}

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	2026-07-04T15:52:50.000526Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1048970c3d5c1c20a0d030b6ae5cbd93a5cbb9972c6be7561d13531fca699659

Aliases

arxiv: quant-ph/0507040 · arxiv_version: quant-ph/0507040v2 · doi: 10.48550/arxiv.quant-ph/0507040 · pith_short_12: CBEJODB5LQOC · pith_short_16: CBEJODB5LQOCBIGQ · pith_short_8: CBEJODB5

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/CBEJODB5LQOCBIGQGC3K4XF5SO \
  | 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: 1048970c3d5c1c20a0d030b6ae5cbd93a5cbb9972c6be7561d13531fca699659

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b1ba3c29299cd0b11a3414a649b44b8f1edc068e1d1941fb5e5235c7052e151",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2005-07-04T21:25:47Z",
    "title_canon_sha256": "91cb2bb8300d1de1d81c2642526827cc712d4c57acf73418569af7a56904704a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0507040",
    "kind": "arxiv",
    "version": 2
  }
}