Pith Number

pith:UQ4BLWR4

pith:2014:UQ4BLWR4UZZOIT7JZFSXXRRBWP

not attested not anchored not stored refs pending

Beyond the fundamental noise limit in coherent optical fiber links

A. Godone, A. Mura, C. Clivati, C. E. Calosso, D. Calonico, E. Bertacco, F. Levi, G. A. Costanzo, M. Frittelli, S. Micalizio

arxiv:1405.5895 v2 · 2014-05-22 · 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{UQ4BLWR4UZZOIT7JZFSXXRRBWP}

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	2026-05-18T01:43:07.252215Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a43815da3ca672e44fe9c9657bc621b3feeeee1d5f28ecd390172d9d1f50c1b5

Aliases

arxiv: 1405.5895 · arxiv_version: 1405.5895v2 · doi: 10.48550/arxiv.1405.5895 · pith_short_12: UQ4BLWR4UZZO · pith_short_16: UQ4BLWR4UZZOIT7J · pith_short_8: UQ4BLWR4

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/UQ4BLWR4UZZOIT7JZFSXXRRBWP \
  | 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: a43815da3ca672e44fe9c9657bc621b3feeeee1d5f28ecd390172d9d1f50c1b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a9f306f9aaf7c6c01f7c78a58d10ab071d11b641e677efa9456d5fad08e965c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2014-05-22T20:18:23Z",
    "title_canon_sha256": "2ad103220fbe3f8203aa67a31014af9cbae866d7bb5d1fc0aa2ed82eaec9707f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.5895",
    "kind": "arxiv",
    "version": 2
  }
}