Pith Number

pith:XB7GJZXO

pith:2018:XB7GJZXONSK43IWDW5EIIGNPEM

not attested not anchored not stored refs pending

Quantum communication in a superposition of causal orders

Daniel Ebler, Giulio Chiribella, Sina Salek

arxiv:1809.06655 v2 · 2018-09-18 · quant-ph · cs.IT · math.IT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XB7GJZXONSK43IWDW5EIIGNPEM}

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	2026-05-18T00:05:21.257445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b87e64e6ee6c95cda2c3b7488419af231c2eeda742f681d1112a367028ca7bfe

Aliases

arxiv: 1809.06655 · arxiv_version: 1809.06655v2 · doi: 10.48550/arxiv.1809.06655 · pith_short_12: XB7GJZXONSK4 · pith_short_16: XB7GJZXONSK43IWD · pith_short_8: XB7GJZXO

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/XB7GJZXONSK43IWDW5EIIGNPEM \
  | 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: b87e64e6ee6c95cda2c3b7488419af231c2eeda742f681d1112a367028ca7bfe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52ec6adc21ddd302fcda4e607910075011483996c5e74b83bfa7edf8ec7b6294",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-09-18T11:54:43Z",
    "title_canon_sha256": "6641ae263682a6bee25dd3b282aa46435a4899fb800d5feaf47cfee36c255a6e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.06655",
    "kind": "arxiv",
    "version": 2
  }
}