Pith Number

pith:FHJAEQWU

pith:2012:FHJAEQWUVUXSOULGBFTWTGJ3CK

not attested not anchored not stored refs pending

Quantum measurement and the first law of thermodynamics: the energy cost of measurement is the work value of the acquired information

Kurt Jacobs

arxiv:1208.1561 v2 · 2012-08-08 · 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{FHJAEQWUVUXSOULGBFTWTGJ3CK}

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	2026-05-18T01:55:21.973597Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29d20242d4ad2f275166096769993b129ca9c9cf77fa3436c9f895a6603bfaeb

Aliases

arxiv: 1208.1561 · arxiv_version: 1208.1561v2 · doi: 10.48550/arxiv.1208.1561 · pith_short_12: FHJAEQWUVUXS · pith_short_16: FHJAEQWUVUXSOULG · pith_short_8: FHJAEQWU

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/FHJAEQWUVUXSOULGBFTWTGJ3CK \
  | 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: 29d20242d4ad2f275166096769993b129ca9c9cf77fa3436c9f895a6603bfaeb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f5337d9fce6ba8622f9f17577bb3a029fa68a88e8d33f0f7921f546e3003160",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-08-08T01:29:24Z",
    "title_canon_sha256": "2e9495c674683de3cbcf12effd4a3dd39ed71276430e13fb2873dddedc97fd61"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.1561",
    "kind": "arxiv",
    "version": 2
  }
}