Pith Number

pith:7H4KY43I

pith:2019:7H4KY43IUQ5SD52HXFXK4YUDNX

not attested not anchored not stored refs pending

Coherence of quantum Gaussian channels

Jianwei Xu

arxiv:1908.04912 v1 · 2019-08-14 · 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{7H4KY43IUQ5SD52HXFXK4YUDNX}

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	2026-07-04T23:55:57.919644Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9f8ac7368a43b21f747b96eae62836ded13a80611885944463801ed47ecc2e3

Aliases

arxiv: 1908.04912 · arxiv_version: 1908.04912v1 · doi: 10.48550/arxiv.1908.04912 · pith_short_12: 7H4KY43IUQ5S · pith_short_16: 7H4KY43IUQ5SD52H · pith_short_8: 7H4KY43I

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/7H4KY43IUQ5SD52HXFXK4YUDNX \
  | 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: f9f8ac7368a43b21f747b96eae62836ded13a80611885944463801ed47ecc2e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a2ac1226b2add642e43ede271216e4515b5868e59eb982e9abf6d5f06d82184",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-08-14T01:41:15Z",
    "title_canon_sha256": "637013910e15620d1f80f33381dcfc18519667f5814dea88fa54a245554c4fe3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.04912",
    "kind": "arxiv",
    "version": 1
  }
}