{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:T52UVEEMIBBBNYPP7B2H7GJSII","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"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}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2604.18662","created_at":"2026-05-20T01:05:13Z"},{"alias_kind":"arxiv_version","alias_value":"2604.18662v2","created_at":"2026-05-20T01:05:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2604.18662","created_at":"2026-05-20T01:05:13Z"},{"alias_kind":"pith_short_12","alias_value":"T52UVEEMIBBB","created_at":"2026-05-20T01:05:13Z"},{"alias_kind":"pith_short_16","alias_value":"T52UVEEMIBBBNYPP","created_at":"2026-05-20T01:05:13Z"},{"alias_kind":"pith_short_8","alias_value":"T52UVEEM","created_at":"2026-05-20T01:05:13Z"}],"graph_snapshots":[{"event_id":"sha256:2a1eaba4deeddbe977b65870da128050241201c78fc79812e1285267cf7eb1c6","target":"graph","created_at":"2026-05-20T01:05:13Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"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."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"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."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"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."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"Quantum routers can gate photon acceptance on real-time coherence estimates from weak measurements without destroying coherence."}],"snapshot_sha256":"00858230c26341779c2005b2e47e3e8de00da9aee56e5726bb26f6bb7e2830ac"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2604.18662/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Single-photon routers in cavity and circuit QED direct photons by the qubit's energy eigenstate -- a projective decision that destroys coherence. We propose a different primitive: coherence-gated routing, where the decision depends on the magnitude of the qubit's quantum coherence, estimated in real time from simultaneous weak measurements of $\\sigma_x$ and $\\sigma_z$. A photon is accepted if the coherence score $S(T) = \\sqrt{\\langle\\sigma_x\\rangle_c^2 + \\langle\\sigma_y\\rangle_c^2}$, extracted from the conditional density matrix via the stochastic master equation, exceeds a tunable threshold $","authors_text":"Priyank Singh","cross_cats":[],"headline":"Quantum routers can gate photon acceptance on real-time coherence estimates from weak measurements without destroying coherence.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-04-20T12:19:54Z","title":"Coherence-gated quantum devices via real-time weak measurement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2604.18662","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-10T05:03:00.384365Z","id":"a3e50ba6-bd7b-41ea-8fbf-db14a392223a","model_set":{"reader":"grok-4.3"},"one_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.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Quantum routers can gate photon acceptance on real-time coherence estimates from weak measurements without destroying coherence.","strongest_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.","weakest_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."}},"verdict_id":"a3e50ba6-bd7b-41ea-8fbf-db14a392223a"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:e527edcfb96a0f0953bed8fe8592f0bbc4d4756ff7c228148add8ffb8c2989f5","target":"record","created_at":"2026-05-20T01:05:13Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"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}},"canonical_sha256":"9f754a908c404216e1eff8747f993242179745f8ff6eabdbb68442b379f67b66","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f754a908c404216e1eff8747f993242179745f8ff6eabdbb68442b379f67b66","first_computed_at":"2026-05-20T01:05:13.926517Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T01:05:13.926517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yZ7eUNyl2Z1+nziwVY62nrFQdXT7ory6D6gXj1G4lQUtJbJ4JZmRxq9Kj3PXVj4BBnv6/zYW4FX12DJNSpNUDQ==","signature_status":"signed_v1","signed_at":"2026-05-20T01:05:13.927433Z","signed_message":"canonical_sha256_bytes"},"source_id":"2604.18662","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e527edcfb96a0f0953bed8fe8592f0bbc4d4756ff7c228148add8ffb8c2989f5","sha256:2a1eaba4deeddbe977b65870da128050241201c78fc79812e1285267cf7eb1c6"],"state_sha256":"88b438f71decf525d872a830ec4f7e081194acc9d6505a5b26fc71cbd8ea7919"}