Pith Number

pith:2MREO57O

pith:2009:2MREO57OXLG2YB6SF7IK46Y3QX

not attested not anchored not stored refs pending

Quantum superadditivity in linear optics networks: sending bits via multiple access Gaussian channels

J. K. Korbicz, L. Czekaj, P. Horodecki, R. W. Chhajlany

arxiv:0904.4870 v1 · 2009-04-30 · 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{2MREO57OXLG2YB6SF7IK46Y3QX}

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	2026-05-18T03:24:06.654514Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3224777eebacdac07d22fd0ae7b1b85ec82921f61b65a3a54a6b99030bf9c7c

Aliases

arxiv: 0904.4870 · arxiv_version: 0904.4870v1 · doi: 10.48550/arxiv.0904.4870 · pith_short_12: 2MREO57OXLG2 · pith_short_16: 2MREO57OXLG2YB6S · pith_short_8: 2MREO57O

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/2MREO57OXLG2YB6SF7IK46Y3QX \
  | 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: d3224777eebacdac07d22fd0ae7b1b85ec82921f61b65a3a54a6b99030bf9c7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78b5ef49f3e972801171ffbc491363814ab0587d41d1f6c8217a11f029540080",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-04-30T16:00:47Z",
    "title_canon_sha256": "be61af9d6a2a60623d0555983a651670bfdb52aa1edd62d8fe91898f031b9af9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4870",
    "kind": "arxiv",
    "version": 1
  }
}