Pith Number

pith:EJJKJMAD

pith:2009:EJJKJMADBLOSFYGC4EY3T6B2WB

not attested not anchored not stored refs pending

Continuous Variable Entanglement and Squeezing of Orbital Angular Momentum States

Gerd Leuchs, Mikael Lassen, Ulrik L. Andersen

arxiv:0901.2783 v2 · 2009-01-19 · 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{EJJKJMADBLOSFYGC4EY3T6B2WB}

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	2026-05-18T02:14:56.876487Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2252a4b0030add22e0c2e131b9f83ab04fa02623c04df43dbaf01cee35904bc8

Aliases

arxiv: 0901.2783 · arxiv_version: 0901.2783v2 · doi: 10.48550/arxiv.0901.2783 · pith_short_12: EJJKJMADBLOS · pith_short_16: EJJKJMADBLOSFYGC · pith_short_8: EJJKJMAD

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/EJJKJMADBLOSFYGC4EY3T6B2WB \
  | 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: 2252a4b0030add22e0c2e131b9f83ab04fa02623c04df43dbaf01cee35904bc8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ec1caec707efc48832cca1af69025f796d11b2f0e544c7d668b630e56a206a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-01-19T08:44:18Z",
    "title_canon_sha256": "207865292c909c0b32ec9f70485e27b301656f6522f6705bf64489c53c2c2817"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2783",
    "kind": "arxiv",
    "version": 2
  }
}