Pith Number

pith:TFRFD55U

pith:2016:TFRFD55UCGE2P73JHJW3URBO4W

not attested not anchored not stored refs pending

Constructing valid density matrices on an NMR quantum information processor via maximum likelihood estimation

Arvind, Harpreet Singh, Kavita Dorai

arxiv:1604.04691 v1 · 2016-04-16 · 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{TFRFD55UCGE2P73JHJW3URBO4W}

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	2026-05-18T01:08:17.623063Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

996251f7b41189a7ff693a6dba442ee5b436a33a57d22b62421ff700aaf39d27

Aliases

arxiv: 1604.04691 · arxiv_version: 1604.04691v1 · doi: 10.48550/arxiv.1604.04691 · pith_short_12: TFRFD55UCGE2 · pith_short_16: TFRFD55UCGE2P73J · pith_short_8: TFRFD55U

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/TFRFD55UCGE2P73JHJW3URBO4W \
  | 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: 996251f7b41189a7ff693a6dba442ee5b436a33a57d22b62421ff700aaf39d27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d428ae213c51b2cb03aa1421cce5e2fb636679e65c910185a26d50e042531ed8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2016-04-16T04:53:33Z",
    "title_canon_sha256": "264b4debfb98783c58c2cde3bd965dcd472bfc128def079a85360938479e16b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.04691",
    "kind": "arxiv",
    "version": 1
  }
}