Pith Number

pith:3ETFTNP5

pith:2026:3ETFTNP5BZPJO2L45LZ46RIX25

not attested not anchored not stored refs pending

Photonic hyperentanglement in polarisation and frequency via joint spectrum shaping

Fabian Steinhauser, Gregor Weihs, Robert Keil, Stefan Frick, Tommaso Faleo

arxiv:2603.03428 v1 · 2026-03-03 · quant-ph · physics.app-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{3ETFTNP5BZPJO2L45LZ46RIX25}

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	2026-07-22T01:22:21.121942Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d92659b5fd0e5e97697ceaf3cf4517d76209d675ff4a9c654a20279d4b5c95e4

Aliases

arxiv: 2603.03428 · arxiv_version: 2603.03428v1 · doi: 10.48550/arxiv.2603.03428 · pith_short_12: 3ETFTNP5BZPJ · pith_short_16: 3ETFTNP5BZPJO2L4 · pith_short_8: 3ETFTNP5

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/3ETFTNP5BZPJO2L45LZ46RIX25 \
  | 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: d92659b5fd0e5e97697ceaf3cf4517d76209d675ff4a9c654a20279d4b5c95e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f411408799fc5a80f8a7a2fa7fe31020ffd946ae1b3f8b93b9f2070a52ce68f4",
    "cross_cats_sorted": [
      "physics.app-ph",
      "physics.optics"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-03-03T19:00:01Z",
    "title_canon_sha256": "71a17b694e6d2a4949cedfda9f0ac958194441dd19d9b4babec3c17480ff3a51"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.03428",
    "kind": "arxiv",
    "version": 1
  }
}