{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:TLW2LO4EXZI5ZTIMH23XQJN4J7","short_pith_number":"pith:TLW2LO4E","canonical_record":{"source":{"id":"2608.09670","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-10T14:44:51Z","cross_cats_sorted":[],"title_canon_sha256":"90cd47378b8e52c37be124481e1c29ed02c03d725150b3fe3ac0165bfbd3b680","abstract_canon_sha256":"db01d21f5916b107e8a99524ffa534f7290b00bbe4feeb840eecae6bc878cff3"},"schema_version":"1.0"},"canonical_sha256":"9aeda5bb84be51dccd0c3eb77825bc4fd6333418917947daa9ffd69ed3578e00","source":{"kind":"arxiv","id":"2608.09670","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.09670","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"arxiv_version","alias_value":"2608.09670v1","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.09670","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"pith_short_12","alias_value":"TLW2LO4EXZI5","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"pith_short_16","alias_value":"TLW2LO4EXZI5ZTIM","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"pith_short_8","alias_value":"TLW2LO4E","created_at":"2026-08-11T02:24:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:TLW2LO4EXZI5ZTIMH23XQJN4J7","target":"record","payload":{"canonical_record":{"source":{"id":"2608.09670","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-10T14:44:51Z","cross_cats_sorted":[],"title_canon_sha256":"90cd47378b8e52c37be124481e1c29ed02c03d725150b3fe3ac0165bfbd3b680","abstract_canon_sha256":"db01d21f5916b107e8a99524ffa534f7290b00bbe4feeb840eecae6bc878cff3"},"schema_version":"1.0"},"canonical_sha256":"9aeda5bb84be51dccd0c3eb77825bc4fd6333418917947daa9ffd69ed3578e00","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-11T02:24:46.695974Z","signature_b64":"RA3+KK5wXEqEv4hVOUOgkDmvLDLuGi3nh/D+Axk6/qPHuWkGOVaVJYJqs0fqa2V3/cIhr2NtBhO49JqAs3axBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9aeda5bb84be51dccd0c3eb77825bc4fd6333418917947daa9ffd69ed3578e00","last_reissued_at":"2026-08-11T02:24:46.694373Z","signature_status":"signed_v1","first_computed_at":"2026-08-11T02:24:46.694373Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.09670","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-11T02:24:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pgAppKtap9b3M/iUZTtQtzquYx0dpJFJdUVn9tRSN5Y8rIy+9rMf/j7XHi5tjvrYnlrwy6N0KRfx6dzdtyI7BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T09:37:35.416124Z"},"content_sha256":"2ddcc950848a8b6bda28dcd5716588cf19a8a42026bfed988f9e9e394157028a","schema_version":"1.0","event_id":"sha256:2ddcc950848a8b6bda28dcd5716588cf19a8a42026bfed988f9e9e394157028a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:TLW2LO4EXZI5ZTIMH23XQJN4J7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Microscopic QED origin of spin entanglement","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Moslem Zarei","submitted_at":"2026-08-10T14:44:51Z","abstract_excerpt":"We study effective spin interactions arising from quantum electrodynamics (QED) scattering between localized fermionic spins. By integrating out photon and mediator fields, the dynamics reduce to an effective spin Hamiltonian.\n  For two qubits in the nonrelativistic regime, the resulting interaction takes a tensor dipolar form with an asymptotic decay proportional to \\(R^{-3}\\). We obtain analytical expressions for the entanglement negativity, highlighting its dependence on coupling strength and spatial configuration.\n  We then examine a setup in which two bath spins interact via a sequential "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.09670","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2608.09670/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-11T02:24:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Zn4ryJqFpL/aQfbnKzp6uaNsTHzvxad7Ha5S8mrRgpZw7UH4C8TZnSCXoCyEER4g3xE8sx6f9VSlLREppNHiBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T09:37:35.416692Z"},"content_sha256":"bed5bc43c265c3980e24423c7d55391c18fbbaf98965e637eed3f090901b1fe4","schema_version":"1.0","event_id":"sha256:bed5bc43c265c3980e24423c7d55391c18fbbaf98965e637eed3f090901b1fe4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TLW2LO4EXZI5ZTIMH23XQJN4J7/bundle.json","state_url":"https://pith.science/pith/TLW2LO4EXZI5ZTIMH23XQJN4J7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TLW2LO4EXZI5ZTIMH23XQJN4J7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-12T09:37:35Z","links":{"resolver":"https://pith.science/pith/TLW2LO4EXZI5ZTIMH23XQJN4J7","bundle":"https://pith.science/pith/TLW2LO4EXZI5ZTIMH23XQJN4J7/bundle.json","state":"https://pith.science/pith/TLW2LO4EXZI5ZTIMH23XQJN4J7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TLW2LO4EXZI5ZTIMH23XQJN4J7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:TLW2LO4EXZI5ZTIMH23XQJN4J7","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":"db01d21f5916b107e8a99524ffa534f7290b00bbe4feeb840eecae6bc878cff3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-10T14:44:51Z","title_canon_sha256":"90cd47378b8e52c37be124481e1c29ed02c03d725150b3fe3ac0165bfbd3b680"},"schema_version":"1.0","source":{"id":"2608.09670","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.09670","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"arxiv_version","alias_value":"2608.09670v1","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.09670","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"pith_short_12","alias_value":"TLW2LO4EXZI5","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"pith_short_16","alias_value":"TLW2LO4EXZI5ZTIM","created_at":"2026-08-11T02:24:46Z"},{"alias_kind":"pith_short_8","alias_value":"TLW2LO4E","created_at":"2026-08-11T02:24:46Z"}],"graph_snapshots":[{"event_id":"sha256:bed5bc43c265c3980e24423c7d55391c18fbbaf98965e637eed3f090901b1fe4","target":"graph","created_at":"2026-08-11T02:24:46Z","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":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2608.09670/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study effective spin interactions arising from quantum electrodynamics (QED) scattering between localized fermionic spins. By integrating out photon and mediator fields, the dynamics reduce to an effective spin Hamiltonian.\n  For two qubits in the nonrelativistic regime, the resulting interaction takes a tensor dipolar form with an asymptotic decay proportional to \\(R^{-3}\\). We obtain analytical expressions for the entanglement negativity, highlighting its dependence on coupling strength and spatial configuration.\n  We then examine a setup in which two bath spins interact via a sequential ","authors_text":"Moslem Zarei","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-10T14:44:51Z","title":"Microscopic QED origin of spin entanglement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.09670","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:2ddcc950848a8b6bda28dcd5716588cf19a8a42026bfed988f9e9e394157028a","target":"record","created_at":"2026-08-11T02:24:46Z","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":"db01d21f5916b107e8a99524ffa534f7290b00bbe4feeb840eecae6bc878cff3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-10T14:44:51Z","title_canon_sha256":"90cd47378b8e52c37be124481e1c29ed02c03d725150b3fe3ac0165bfbd3b680"},"schema_version":"1.0","source":{"id":"2608.09670","kind":"arxiv","version":1}},"canonical_sha256":"9aeda5bb84be51dccd0c3eb77825bc4fd6333418917947daa9ffd69ed3578e00","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9aeda5bb84be51dccd0c3eb77825bc4fd6333418917947daa9ffd69ed3578e00","first_computed_at":"2026-08-11T02:24:46.694373Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-11T02:24:46.694373Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RA3+KK5wXEqEv4hVOUOgkDmvLDLuGi3nh/D+Axk6/qPHuWkGOVaVJYJqs0fqa2V3/cIhr2NtBhO49JqAs3axBg==","signature_status":"signed_v1","signed_at":"2026-08-11T02:24:46.695974Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.09670","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ddcc950848a8b6bda28dcd5716588cf19a8a42026bfed988f9e9e394157028a","sha256:bed5bc43c265c3980e24423c7d55391c18fbbaf98965e637eed3f090901b1fe4"],"state_sha256":"2ce0b323aa6a33cb09b90ca20d98bfe71062cc6c99c7289414fc5954a8b197f9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ynm3FYqKXdg86i1dJy1ZAfrp2wr8LuNufqfYaEOB6IInFFOgTqrPo05xKrmumqePmMSxrt4RES9OiQs6XkHJBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T09:37:35.439707Z","bundle_sha256":"63396ed69ffc5cd0e2dbb4f81f28bbab3157c1f7cb222a03d55bfeec2737d398"}}