Pith Number

pith:4RHHFUHD

pith:2020:4RHHFUHDYMOANIQQJ7S4J7A5GF

not attested not anchored not stored refs pending

On the Heisenberg limit for detecting vacuum birefringence

H.-P. Schlenvoigt, N. Ahmadiniaz, R. Sauerbrey, R. Sch\"utzhold, T.E. Cowan, U. Schramm

arxiv:2003.10519 v1 · 2020-03-23 · hep-ph · hep-th · 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{4RHHFUHDYMOANIQQJ7S4J7A5GF}

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	2026-07-05T01:16:46.545838Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e44e72d0e3c31c06a2104fe5c4fc1d31503d17e1545208c39909d1c5d7cfbe4b

Aliases

arxiv: 2003.10519 · arxiv_version: 2003.10519v1 · doi: 10.48550/arxiv.2003.10519 · pith_short_12: 4RHHFUHDYMOA · pith_short_16: 4RHHFUHDYMOANIQQ · pith_short_8: 4RHHFUHD

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/4RHHFUHDYMOANIQQJ7S4J7A5GF \
  | 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: e44e72d0e3c31c06a2104fe5c4fc1d31503d17e1545208c39909d1c5d7cfbe4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "426e2a216a38fefcde2cedafee979660cb08a909a0c9210c7072c17bc7043a68",
    "cross_cats_sorted": [
      "hep-th",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2020-03-23T20:04:43Z",
    "title_canon_sha256": "1eb2e0e98763d0b61b44ebc7a296b97f3adc20784701a4aae5e734168240c637"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.10519",
    "kind": "arxiv",
    "version": 1
  }
}