Pith Number

pith:EZP4KUNA

pith:2019:EZP4KUNAY2LT7F7LLIKVXBWJLK

not attested not anchored not stored refs pending

Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution

Koji Azuma, Marcos Curty, R\'obert Tr\'enyi

arxiv:1908.04539 v1 · 2019-08-13 · 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{EZP4KUNAY2LT7F7LLIKVXBWJLK}

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	2026-07-05T00:34:42.742436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

265fc551a0c6973f97eb5a155b86c95a9576c2eb7649e8c244053deb86ed84d7

Aliases

arxiv: 1908.04539 · arxiv_version: 1908.04539v1 · doi: 10.48550/arxiv.1908.04539 · pith_short_12: EZP4KUNAY2LT · pith_short_16: EZP4KUNAY2LT7F7L · pith_short_8: EZP4KUNA

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/EZP4KUNAY2LT7F7LLIKVXBWJLK \
  | 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: 265fc551a0c6973f97eb5a155b86c95a9576c2eb7649e8c244053deb86ed84d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "195009ae2bb8a77d02a7e79812a1c3195775c7fa91de86f62e5350ac47f78a38",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-08-13T08:50:09Z",
    "title_canon_sha256": "0e33fd8f608b58c88b50bdc38446d18a6ce7835197ca718fcec9c965f8e3d84c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.04539",
    "kind": "arxiv",
    "version": 1
  }
}