Pith Number

pith:3PPN4YMK

pith:2021:3PPN4YMKH6Q2TLOF2J4CEIAJN4

not attested not anchored not stored refs pending

Simple and loss-tolerant free-space QKD using a squeezed laser

Matthew S. Winnel, Nedasadat Hosseinidehaj, Timothy C. Ralph

arxiv:2107.03629 v1 · 2021-07-08 · 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{3PPN4YMKH6Q2TLOF2J4CEIAJN4}

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	2026-07-05T04:03:48.763860Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dbdede618a3fa1a9adc5d2782220096f0e561e127065f985402e4c3f22e339e0

Aliases

arxiv: 2107.03629 · arxiv_version: 2107.03629v1 · doi: 10.48550/arxiv.2107.03629 · pith_short_12: 3PPN4YMKH6Q2 · pith_short_16: 3PPN4YMKH6Q2TLOF · pith_short_8: 3PPN4YMK

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/3PPN4YMKH6Q2TLOF2J4CEIAJN4 \
  | 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: dbdede618a3fa1a9adc5d2782220096f0e561e127065f985402e4c3f22e339e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4b20763bab303fb7d0a8277bb766c02e03b58089fbd51dae28e74de174b6a67",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-07-08T06:46:37Z",
    "title_canon_sha256": "e04218bee5f6ce7537b01c9f82d647575a1e397ee7da16fd914c8206ab721af8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.03629",
    "kind": "arxiv",
    "version": 1
  }
}