Pith Number

pith:UHMPRFNR

pith:2017:UHMPRFNRQUGJ73PXUKAYLIJTGC

not attested not anchored not stored refs pending

Real-Time Kalman Filter: Cooling of an Optically Levitated Nanoparticle

Ashley Setter, Hendrik Ulbricht, Jason F. Ralph, Marko Toro\v{s}

arxiv:1712.07921 v3 · 2017-12-21 · quant-ph · cond-mat.mes-hall · 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{UHMPRFNRQUGJ73PXUKAYLIJTGC}

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	2026-05-18T00:18:35.753075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1d8f895b1850c9fedf7a28185a13330ba85753f1bc0e8c128e3428a98cf879f

Aliases

arxiv: 1712.07921 · arxiv_version: 1712.07921v3 · doi: 10.48550/arxiv.1712.07921 · pith_short_12: UHMPRFNRQUGJ · pith_short_16: UHMPRFNRQUGJ73PX · pith_short_8: UHMPRFNR

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/UHMPRFNRQUGJ73PXUKAYLIJTGC \
  | 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: a1d8f895b1850c9fedf7a28185a13330ba85753f1bc0e8c128e3428a98cf879f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b22def6e4c1394296644a79943566344b2969e1f5b405cc2ef32681005bee41",
    "cross_cats_sorted": [
      "cond-mat.mes-hall",
      "physics.app-ph",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2017-12-21T13:06:10Z",
    "title_canon_sha256": "88abc849b78b3dd7daeb8dcaedfdb2924cf50782c0682aa12c65d70aa7bf8381"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.07921",
    "kind": "arxiv",
    "version": 3
  }
}