{"paper":{"title":"Light-Cone Structure of Propagation of Entanglement","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Bipartite quantum systems with localized couplings exhibit an effective light-cone for entanglement propagation.","cross_cats":["math-ph","math.FA","math.MP"],"primary_cat":"quant-ph","authors_text":"Israel Michael Sigal","submitted_at":"2026-04-29T20:19:04Z","abstract_excerpt":"For a wide class of bipartite systems with localized couplings, we establish existence of an effective light-cone for propagation of entanglement. This result yields a hard lower bound on the time it takes, under ideal conditions (no loss, no decoherence), to transport entanglement to a distant location (say, a node of a graph-structured quantum network), or to maintain it there."},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"For a wide class of bipartite systems with localized couplings, we establish existence of an effective light-cone for propagation of entanglement. This result yields a hard lower bound on the time it takes, under ideal conditions (no loss, no decoherence), to transport entanglement to a distant location.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The quantum systems belong to a wide class of bipartite systems whose couplings are localized, and the analysis assumes ideal conditions with no loss or decoherence.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Existence of an effective light-cone for entanglement propagation in bipartite systems with localized couplings, yielding a hard lower bound on transport time under ideal conditions.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Bipartite quantum systems with localized couplings exhibit an effective light-cone for entanglement propagation.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"02fc0616ce52b629ad53975efffe25aba7aa6ef8b103f4296787f6367602986c"},"source":{"id":"2604.27170","kind":"arxiv","version":2},"verdict":{"id":"84836e45-9bcb-4681-8264-1ba33a597067","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-07T09:34:32.395352Z","strongest_claim":"For a wide class of bipartite systems with localized couplings, we establish existence of an effective light-cone for propagation of entanglement. This result yields a hard lower bound on the time it takes, under ideal conditions (no loss, no decoherence), to transport entanglement to a distant location.","one_line_summary":"Existence of an effective light-cone for entanglement propagation in bipartite systems with localized couplings, yielding a hard lower bound on transport time under ideal conditions.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The quantum systems belong to a wide class of bipartite systems whose couplings are localized, and the analysis assumes ideal conditions with no loss or decoherence.","pith_extraction_headline":"Bipartite quantum systems with localized couplings exhibit an effective light-cone for entanglement propagation."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.27170/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"ai_meta_artifact","ran_at":"2026-05-20T22:42:59.145262Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T19:32:04.953891Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"5d31ff814593f39fe58eec209c65ab1104da7dd27fdb485dbf3750aa3b02e262"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}