Pith Number

pith:RO75HJME

pith:2018:RO75HJMEJQWGNO7X6EMDV77XWZ

not attested not anchored not stored refs pending

Observation of Optical Refrigeration in a Holmium-doped Crystal

Alexander R Albrecht, Azzurra Volpi, Mansoor Sheik-Bahae, Saeid Rostami

arxiv:1811.05745 v1 · 2018-11-14 · 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{RO75HJMEJQWGNO7X6EMDV77XWZ}

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	2026-05-17T23:50:22.998605Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8bbfd3a5844c2c66bbf7f1183afff7b641f8f85fa96b65a4b2ec86e16ef95877

Aliases

arxiv: 1811.05745 · arxiv_version: 1811.05745v1 · doi: 10.48550/arxiv.1811.05745 · pith_short_12: RO75HJMEJQWG · pith_short_16: RO75HJMEJQWGNO7X · pith_short_8: RO75HJME

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/RO75HJMEJQWGNO7X6EMDV77XWZ \
  | 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: 8bbfd3a5844c2c66bbf7f1183afff7b641f8f85fa96b65a4b2ec86e16ef95877

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae38423276683f6ec30e0ad31eef1cb5a45e855e21a8f4b10b6b0316ee63c71b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2018-11-14T12:18:59Z",
    "title_canon_sha256": "1932ee04600f699b6baa9952f5390b2ce66cf6ffb1f44edb941e76cf985c9471"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.05745",
    "kind": "arxiv",
    "version": 1
  }
}