Pith Number

pith:T52UVEEM

pith:2026:T52UVEEMIBBBNYPP7B2H7GJSII

not attested not anchored not stored refs pending

Coherence-gated quantum devices via real-time weak measurement

Priyank Singh

Quantum routers can gate photon acceptance on real-time coherence estimates from weak measurements without destroying coherence.

arxiv:2604.18662 v2 · 2026-04-20 · 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{T52UVEEMIBBBNYPP7B2H7GJSII}

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.

Claims

C1strongest claim

A photon is accepted depending on whether S(T) = sqrt(<σ_x>_c² + <σ_y>_c²) exceeds a tunable threshold S_th. This enables a quantum random number generator with min-entropy bounded by Bloch-sphere geometry, H_∞ ≥ -log₂((1 + sqrt(1 - S_th²))/2), and a phase-tracked photon source where independent certification at two nodes bounds the matter-matter entanglement fidelity after Bell-state measurement.

C2weakest assumption

That the real-time coherence estimator computed from simultaneous weak measurements of σ_x and σ_z remains a faithful lower bound on actual coherence even after the deliberate underestimation of detector efficiency η_a, and that the purity monotonicity result invoked to control overcertification holds under the experimental noise model.

C3one line summary

Coherence-gated routing accepts photons when real-time weak-measurement coherence estimate S(T) exceeds a threshold, yielding geometrically bounded min-entropy for QRNG and fidelity bounds for entanglement.

Cited by

2 papers in Pith

Coherence-gated quantum devices via real-time weak measurement

Receipt and verification

First computed	2026-05-20T01:05:13.926517Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f754a908c404216e1eff8747f993242179745f8ff6eabdbb68442b379f67b66

Aliases

arxiv: 2604.18662 · arxiv_version: 2604.18662v2 · doi: 10.48550/arxiv.2604.18662 · pith_short_12: T52UVEEMIBBB · pith_short_16: T52UVEEMIBBBNYPP · pith_short_8: T52UVEEM

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/T52UVEEMIBBBNYPP7B2H7GJSII \
  | 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: 9f754a908c404216e1eff8747f993242179745f8ff6eabdbb68442b379f67b66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d2177f91c3970c6447df0e2645c77e7ec93b8b75df8b0d3ef7101ecd34bd09b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-04-20T12:19:54Z",
    "title_canon_sha256": "3ccff0d14af34911fd7713642a7519a8a228d9abe32e4dfddbf8c3f986b41dbe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.18662",
    "kind": "arxiv",
    "version": 2
  }
}