Pith Number

pith:6XKMQGUR

pith:2026:6XKMQGURTL564JBME5ZS5FCQZQ

not attested not anchored not stored refs pending

Experimental Quantum Key Distribution in an Indefinite Causal Order

Hector Spencer-Wood, Kyrylo Simonov, Lee A. Rozema, Mart\'i Cladera-Rossell\'o, Mathieu Bozzio, Michael Antesberger, Patrik Sund, Philip Walther, Yann Valibouse

arxiv:2608.13561 v1 · 2026-08-13 · 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{6XKMQGURTL564JBME5ZS5FCQZQ}

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	2026-08-14T01:25:04.993318Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5d4c81a919afbee242c27732e9450cc36d9313fa4edc556487582704792444d

Aliases

arxiv: 2608.13561 · arxiv_version: 2608.13561v1 · doi: 10.48550/arxiv.2608.13561 · pith_short_12: 6XKMQGURTL56 · pith_short_16: 6XKMQGURTL564JBM · pith_short_8: 6XKMQGUR

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/6XKMQGURTL564JBME5ZS5FCQZQ \
  | 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: f5d4c81a919afbee242c27732e9450cc36d9313fa4edc556487582704792444d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "687b0771fa3697bac88f9f136f0ef7746b0f490195db858c378ed3f9f7707cea",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-08-13T17:59:58Z",
    "title_canon_sha256": "e72bbdbc5e7e48736b857d5ed00a9e75e98b14327cd4617cac97fba5ed8ce472"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.13561",
    "kind": "arxiv",
    "version": 1
  }
}