Pith Number

pith:EYHNFW5I

pith:2018:EYHNFW5IGYD7LCHALJISINNHSQ

not attested not anchored not stored refs pending

Causal limit on quantum communication

Joseph F. Fitzsimons, Robert Pisarczyk, Vlatko Vedral, Yingkai Ouyang, Zhikuan Zhao

arxiv:1804.02594 v2 · 2018-04-07 · 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{EYHNFW5IGYD7LCHALJISINNHSQ}

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	2026-07-05T00:42:51.496855Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

260ed2dba83607f588e05a512435a7940171ffe736dcf510bbe3e2e3ca9327ee

Aliases

arxiv: 1804.02594 · arxiv_version: 1804.02594v2 · doi: 10.48550/arxiv.1804.02594 · pith_short_12: EYHNFW5IGYD7 · pith_short_16: EYHNFW5IGYD7LCHA · pith_short_8: EYHNFW5I

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/EYHNFW5IGYD7LCHALJISINNHSQ \
  | 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: 260ed2dba83607f588e05a512435a7940171ffe736dcf510bbe3e2e3ca9327ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0632d00fda8a7167f93225a203a6f913e1524a25905c2b3ee7c4de5df8f809e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-04-07T21:32:16Z",
    "title_canon_sha256": "c30631f3d189fabbe6864d424ff4d594c59456f6afde3856f07350871372436c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.02594",
    "kind": "arxiv",
    "version": 2
  }
}