Pith Number

pith:WU7QXA2P

pith:2015:WU7QXA2PK6MLFMYHWCZSZYZECN

not attested not anchored not stored refs pending

A Quantum Repeater Node with Trapped Ions: A Realistic Case Example

Andreas Daniel Pfister, Ferdinand Schmidt-Kaler, Marcel Salz, Max Hettrich, Ulrich Georg Poschinger

arxiv:1508.05272 v2 · 2015-08-21 · quant-ph · physics.atom-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{WU7QXA2PK6MLFMYHWCZSZYZECN}

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	2026-05-18T01:16:29.610774Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b53f0b834f5798b2b307b0b32ce3241368b58fa7061eb844207874a5ad6b6b52

Aliases

arxiv: 1508.05272 · arxiv_version: 1508.05272v2 · doi: 10.48550/arxiv.1508.05272 · pith_short_12: WU7QXA2PK6ML · pith_short_16: WU7QXA2PK6MLFMYH · pith_short_8: WU7QXA2P

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/WU7QXA2PK6MLFMYHWCZSZYZECN \
  | 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: b53f0b834f5798b2b307b0b32ce3241368b58fa7061eb844207874a5ad6b6b52

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "252ba54ad012e072e152a95f2be3f44b661879ac95093fe6eea183e8f71567a4",
    "cross_cats_sorted": [
      "physics.atom-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-08-21T14:01:28Z",
    "title_canon_sha256": "c47656939588a72bc6c005253551e890041697e1d8f3eb0c73ec7ca02b37da7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05272",
    "kind": "arxiv",
    "version": 2
  }
}