Pith Number

pith:7R5A6QWS

pith:2010:7R5A6QWS3NLRBCOXNHWJRKX2BR

not attested not anchored not stored refs pending

A fundamental limit to the efficiency of spin-exchange optical pumping of 3He nuclei

A. Dalgarno, H. R. Sadeghpour, P. Zhang, T. V. Tscherbul

arxiv:1012.0593 v1 · 2010-12-02 · physics.atom-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{7R5A6QWS3NLRBCOXNHWJRKX2BR}

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	2026-05-18T04:03:09.331228Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc7a0f42d2db571089d769ec98aafa0c580a21f96b4b97954d46ad1d680c5486

Aliases

arxiv: 1012.0593 · arxiv_version: 1012.0593v1 · doi: 10.48550/arxiv.1012.0593 · pith_short_12: 7R5A6QWS3NLR · pith_short_16: 7R5A6QWS3NLRBCOX · pith_short_8: 7R5A6QWS

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/7R5A6QWS3NLRBCOXNHWJRKX2BR \
  | 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: fc7a0f42d2db571089d769ec98aafa0c580a21f96b4b97954d46ad1d680c5486

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30fef25be37dbe95303f5b4ddb7740fa9651b33c75a4f099866a28c4153f8cf2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2010-12-02T22:20:10Z",
    "title_canon_sha256": "25ca1c228a8d122b8d61dc4f580b05dc046b5c809fb355ac9827ec1f063d3910"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.0593",
    "kind": "arxiv",
    "version": 1
  }
}