Pith Number

pith:QF7PD2IH

pith:2010:QF7PD2IHTFJYREJZSODZO7SJS7

not attested not anchored not stored refs pending

A Spectroscopic Method to Measure the Superfluid Fraction of an Ultracold Atomic Gas

N. R. Cooper, S. T. John, Z. Hadzibabic

arxiv:1011.2532 v2 · 2010-11-10 · cond-mat.quant-gas

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QF7PD2IHTFJYREJZSODZO7SJS7}

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	2026-05-18T00:34:05.537768Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

817ef1e90799538891399387977e4997eb3342baa7e8c538a525bf124304be7e

Aliases

arxiv: 1011.2532 · arxiv_version: 1011.2532v2 · doi: 10.48550/arxiv.1011.2532 · pith_short_12: QF7PD2IHTFJY · pith_short_16: QF7PD2IHTFJYREJZ · pith_short_8: QF7PD2IH

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/QF7PD2IHTFJYREJZSODZO7SJS7 \
  | 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: 817ef1e90799538891399387977e4997eb3342baa7e8c538a525bf124304be7e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e577cb766dcfcf52adac92b04bcb5a0670a55dd659034bcf4e9e7306cd909fab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.quant-gas",
    "submitted_at": "2010-11-10T23:35:59Z",
    "title_canon_sha256": "d83c7f2eb0e1bb814c19df8327b81f6b1cafcd210a7e89e51ba56c202977a8d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.2532",
    "kind": "arxiv",
    "version": 2
  }
}