Pith Number

pith:7X7OBXSA

pith:2001:7X7OBXSADDUEZNNHQPR7MMJJHT

not attested not anchored not stored refs pending

The Meaning of the Interaction-Free Measurements

Lev Vaidman

arxiv:quant-ph/0103081 v1 · 2001-03-14 · 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{7X7OBXSADDUEZNNHQPR7MMJJHT}

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.

Cited by

1 paper in Pith

Counterfactual Quantum Sensing: What Interaction-Free Measurement Can and Cannot Buy

Receipt and verification

First computed	2026-07-04T14:45:36.626883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fdfee0de4018e84cb5a783e3f631293cc20fdc254f7c60375c92fb31699e87da

Aliases

arxiv: quant-ph/0103081 · arxiv_version: quant-ph/0103081v1 · doi: 10.48550/arxiv.quant-ph/0103081 · pith_short_12: 7X7OBXSADDUE · pith_short_16: 7X7OBXSADDUEZNNH · pith_short_8: 7X7OBXSA

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/7X7OBXSADDUEZNNHQPR7MMJJHT \
  | 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: fdfee0de4018e84cb5a783e3f631293cc20fdc254f7c60375c92fb31699e87da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c9a594e8fbd28d1f8af380b1c64861b18d0504d621987ee738ac8013ee4af28",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2001-03-14T16:46:37Z",
    "title_canon_sha256": "3cebc1feedeb78827219d0ad7e3d79d2cd974847ed0bd40c7c6c699bbc00d55a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0103081",
    "kind": "arxiv",
    "version": 1
  }
}