Pith Number

pith:VQKRMEFD

pith:2025:VQKRMEFDA7ALEYL4SRS675JDJR

not attested not anchored not stored refs pending

Negative absolute temperature attractor in a dense photon gas

D. Kharenko, F. Frezza, F. Mangini, K. Stefanska, M. Ferraro, M. Gervaziev, S. Babin, S. Wabnitz, V. Couderc, W.A. Gemechu

arxiv:2505.21163 v1 · 2025-05-27 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VQKRMEFDA7ALEYL4SRS675JDJR}

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	2026-07-05T11:10:24.820663Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac151610a307c0b2617c9465eff5234c687f43258119e9685ebf917df25a8e2f

Aliases

arxiv: 2505.21163 · arxiv_version: 2505.21163v1 · doi: 10.48550/arxiv.2505.21163 · pith_short_12: VQKRMEFDA7AL · pith_short_16: VQKRMEFDA7ALEYL4 · pith_short_8: VQKRMEFD

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/VQKRMEFDA7ALEYL4SRS675JDJR \
  | 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: ac151610a307c0b2617c9465eff5234c687f43258119e9685ebf917df25a8e2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a66faecc200aa26870267985ed080c7b63745dcc40f09d4b19959857e4261bb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2025-05-27T13:16:58Z",
    "title_canon_sha256": "aafcf6009853d75a7e576490823440b6768dc155e7ab18980c03e21f88546932"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.21163",
    "kind": "arxiv",
    "version": 1
  }
}