Pith Number

pith:TUTP2DNQ

pith:2019:TUTP2DNQAI6MWQX6QFLIHDLYAJ

not attested not anchored not stored refs pending

Quantum Metrology with Indefinite Causal Order

Giulio Chiribella, Xiaobin Zhao, Yuxiang Yang

arxiv:1912.02449 v4 · 2019-12-05 · 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{TUTP2DNQAI6MWQX6QFLIHDLYAJ}

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	2026-07-05T01:02:57.654821Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d26fd0db0023ccb42fe8156838d780245838f5d3b0616b0c5b1be8fec2831e4

Aliases

arxiv: 1912.02449 · arxiv_version: 1912.02449v4 · doi: 10.48550/arxiv.1912.02449 · pith_short_12: TUTP2DNQAI6M · pith_short_16: TUTP2DNQAI6MWQX6 · pith_short_8: TUTP2DNQ

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/TUTP2DNQAI6MWQX6QFLIHDLYAJ \
  | 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: 9d26fd0db0023ccb42fe8156838d780245838f5d3b0616b0c5b1be8fec2831e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "500316774d0fa08f17e537ecbd775f9105cb13261a39a2325c9e9123c586f186",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-12-05T09:18:57Z",
    "title_canon_sha256": "615e7ad44e033b4bf3ff752e04d23df5e8b1f16a5b650c72e65f9d9aa69b337d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.02449",
    "kind": "arxiv",
    "version": 4
  }
}