Pith Number

pith:Z326LOC3

pith:2015:Z326LOC3JZRR42QCXT3HA6ZVZ3

not attested not anchored not stored refs pending

Why protective measurement does not establish the reality of the quantum state

Christopher Ferrie, Joshua Combes, Matthew F. Pusey, Matthew S. Leifer

arxiv:1509.08893 v1 · 2015-09-29 · 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{Z326LOC3JZRR42QCXT3HA6ZVZ3}

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	2026-05-18T00:15:42.480737Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cef5e5b85b4e631e6a02bcf6707b35cef59dc575b71b690649dda7671c2ddece

Aliases

arxiv: 1509.08893 · arxiv_version: 1509.08893v1 · doi: 10.48550/arxiv.1509.08893 · pith_short_12: Z326LOC3JZRR · pith_short_16: Z326LOC3JZRR42QC · pith_short_8: Z326LOC3

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/Z326LOC3JZRR42QCXT3HA6ZVZ3 \
  | 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: cef5e5b85b4e631e6a02bcf6707b35cef59dc575b71b690649dda7671c2ddece

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3017b503b040ee8053be8b17dcd4fdffeb14e27cbbf28de4100d0d6928216847",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-09-29T19:12:58Z",
    "title_canon_sha256": "89efc31e8349c7f9cc3aa586ab42bcdbda90ae1611e3cf9ec1f2c1f0a43005e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.08893",
    "kind": "arxiv",
    "version": 1
  }
}