Pith Number

pith:NMBMHWEV

pith:2009:NMBMHWEVM7C4TKEBLWK3WGLEUT

not attested not anchored not stored refs pending

Emergence of the persistent spin helix in semiconductor quantum wells

Andrei Bernevig, Chris Weber, David Awschalom, Jake D. Koralek, Joe Orenstein, Shawn Mack, Shou-Cheng Zhang

arxiv:0903.4709 v2 · 2009-03-26 · cond-mat.mtrl-sci · cond-mat.mes-hall

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NMBMHWEVM7C4TKEBLWK3WGLEUT}

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	2026-07-04T15:40:30.206236Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b02c3d89567c5c9a8815d95bb1964a4d2db57e5df1b4f6e868df36da40d3d5e

Aliases

arxiv: 0903.4709 · arxiv_version: 0903.4709v2 · doi: 10.48550/arxiv.0903.4709 · pith_short_12: NMBMHWEVM7C4 · pith_short_16: NMBMHWEVM7C4TKEB · pith_short_8: NMBMHWEV

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/NMBMHWEVM7C4TKEBLWK3WGLEUT \
  | 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: 6b02c3d89567c5c9a8815d95bb1964a4d2db57e5df1b4f6e868df36da40d3d5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "68a1971d60e20fc814b5133a668666832473b7436d879ebbe621443b9129e169",
    "cross_cats_sorted": [
      "cond-mat.mes-hall"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2009-03-26T22:05:22Z",
    "title_canon_sha256": "20da942530041708e2f256b117acd2d4ec4af3c04d8a7cacbb8a8406d5a871b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4709",
    "kind": "arxiv",
    "version": 2
  }
}