{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:RCXWBH2FPKGHF4IN4IHTGGGHOE","short_pith_number":"pith:RCXWBH2F","canonical_record":{"source":{"id":"2102.13430","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-26T12:34:34Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"1b3f0d88ac577b867d669ba8e0f6e848c660750b169c7c5b2bc072e6f9af9aa0","abstract_canon_sha256":"8d3ac53d8b9edc72188f3d05000c82051fb7771b1d71b3d0046cbdd6fd6c1d15"},"schema_version":"1.0"},"canonical_sha256":"88af609f457a8c72f10de20f3318c77128344cfb67edd7c1bb5cf7eb98097d14","source":{"kind":"arxiv","id":"2102.13430","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.13430","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"arxiv_version","alias_value":"2102.13430v1","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.13430","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"pith_short_12","alias_value":"RCXWBH2FPKGH","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"pith_short_16","alias_value":"RCXWBH2FPKGHF4IN","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"pith_short_8","alias_value":"RCXWBH2F","created_at":"2026-07-05T02:18:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:RCXWBH2FPKGHF4IN4IHTGGGHOE","target":"record","payload":{"canonical_record":{"source":{"id":"2102.13430","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-26T12:34:34Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"1b3f0d88ac577b867d669ba8e0f6e848c660750b169c7c5b2bc072e6f9af9aa0","abstract_canon_sha256":"8d3ac53d8b9edc72188f3d05000c82051fb7771b1d71b3d0046cbdd6fd6c1d15"},"schema_version":"1.0"},"canonical_sha256":"88af609f457a8c72f10de20f3318c77128344cfb67edd7c1bb5cf7eb98097d14","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:18:37.346623Z","signature_b64":"FewpQjwSP22Z+EtmBzfrpnly5sHJJMTO7oPHqiIgwvlfYcB2BEiDp7NAZJ1PMzg8QFre76XoIBfC4j87wj0VBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"88af609f457a8c72f10de20f3318c77128344cfb67edd7c1bb5cf7eb98097d14","last_reissued_at":"2026-07-05T02:18:37.346038Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:18:37.346038Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.13430","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":"2026-07-05T02:18:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NpzWzn/JCZXJPe+TZVfSnJm/fMYw9sdVQlwG2WMBb2LH+zoOtxlVyolsdlAPIRfO5GOjZq0UtP8HC8D21UFcCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T15:50:00.061518Z"},"content_sha256":"09953e49caaeb5c4c4ae9575c0c09f8b3eb506ff87f30a3688b9d19870e2e1f9","schema_version":"1.0","event_id":"sha256:09953e49caaeb5c4c4ae9575c0c09f8b3eb506ff87f30a3688b9d19870e2e1f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:RCXWBH2FPKGHF4IN4IHTGGGHOE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin relaxation in radical pairs from the stochastic Schr\\\"odinger equation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"quant-ph","authors_text":"David E. Manolopoulos, Lachlan P. Lindoy, Thomas P. Fay","submitted_at":"2021-02-26T12:34:34Z","abstract_excerpt":"We show that the stochastic Schr\\\"odinger equation (SSE) provides an ideal way to simulate the quantum mechanical spin dynamics of radical pairs. Electron spin relaxation effects arising from fluctuations in the spin Hamiltonian are straightforward to include in this approach, and their treatment can be combined with a highly efficient stochastic evaluation of the trace over nuclear spin states that is required to compute experimental observables. These features are illustrated in example applications to a flavin-tryptophan radical pair of interest in avian magnetoreception, and to a problem i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.13430","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/2102.13430/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":"2026-07-05T02:18:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WsOQ82ZaJ5utABYX9OXH+xud9qsmhegLGlIZOwZtE+OqVRVvIlX10nWGogc/A7ZfCmOm6b0Jnr8auv165nyfCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T15:50:00.061891Z"},"content_sha256":"6310f32ef45c902c06c1f5c29870b9ad8ff43d3c7277cc810f33efc38dc3a3cc","schema_version":"1.0","event_id":"sha256:6310f32ef45c902c06c1f5c29870b9ad8ff43d3c7277cc810f33efc38dc3a3cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RCXWBH2FPKGHF4IN4IHTGGGHOE/bundle.json","state_url":"https://pith.science/pith/RCXWBH2FPKGHF4IN4IHTGGGHOE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RCXWBH2FPKGHF4IN4IHTGGGHOE/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":"2026-07-06T15:50:00Z","links":{"resolver":"https://pith.science/pith/RCXWBH2FPKGHF4IN4IHTGGGHOE","bundle":"https://pith.science/pith/RCXWBH2FPKGHF4IN4IHTGGGHOE/bundle.json","state":"https://pith.science/pith/RCXWBH2FPKGHF4IN4IHTGGGHOE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RCXWBH2FPKGHF4IN4IHTGGGHOE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:RCXWBH2FPKGHF4IN4IHTGGGHOE","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":"8d3ac53d8b9edc72188f3d05000c82051fb7771b1d71b3d0046cbdd6fd6c1d15","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-26T12:34:34Z","title_canon_sha256":"1b3f0d88ac577b867d669ba8e0f6e848c660750b169c7c5b2bc072e6f9af9aa0"},"schema_version":"1.0","source":{"id":"2102.13430","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.13430","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"arxiv_version","alias_value":"2102.13430v1","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.13430","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"pith_short_12","alias_value":"RCXWBH2FPKGH","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"pith_short_16","alias_value":"RCXWBH2FPKGHF4IN","created_at":"2026-07-05T02:18:37Z"},{"alias_kind":"pith_short_8","alias_value":"RCXWBH2F","created_at":"2026-07-05T02:18:37Z"}],"graph_snapshots":[{"event_id":"sha256:6310f32ef45c902c06c1f5c29870b9ad8ff43d3c7277cc810f33efc38dc3a3cc","target":"graph","created_at":"2026-07-05T02:18:37Z","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/2102.13430/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that the stochastic Schr\\\"odinger equation (SSE) provides an ideal way to simulate the quantum mechanical spin dynamics of radical pairs. Electron spin relaxation effects arising from fluctuations in the spin Hamiltonian are straightforward to include in this approach, and their treatment can be combined with a highly efficient stochastic evaluation of the trace over nuclear spin states that is required to compute experimental observables. These features are illustrated in example applications to a flavin-tryptophan radical pair of interest in avian magnetoreception, and to a problem i","authors_text":"David E. Manolopoulos, Lachlan P. Lindoy, Thomas P. Fay","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-26T12:34:34Z","title":"Spin relaxation in radical pairs from the stochastic Schr\\\"odinger equation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.13430","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":"sha256:09953e49caaeb5c4c4ae9575c0c09f8b3eb506ff87f30a3688b9d19870e2e1f9","target":"record","created_at":"2026-07-05T02:18:37Z","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":"8d3ac53d8b9edc72188f3d05000c82051fb7771b1d71b3d0046cbdd6fd6c1d15","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-02-26T12:34:34Z","title_canon_sha256":"1b3f0d88ac577b867d669ba8e0f6e848c660750b169c7c5b2bc072e6f9af9aa0"},"schema_version":"1.0","source":{"id":"2102.13430","kind":"arxiv","version":1}},"canonical_sha256":"88af609f457a8c72f10de20f3318c77128344cfb67edd7c1bb5cf7eb98097d14","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"88af609f457a8c72f10de20f3318c77128344cfb67edd7c1bb5cf7eb98097d14","first_computed_at":"2026-07-05T02:18:37.346038Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:18:37.346038Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FewpQjwSP22Z+EtmBzfrpnly5sHJJMTO7oPHqiIgwvlfYcB2BEiDp7NAZJ1PMzg8QFre76XoIBfC4j87wj0VBA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:18:37.346623Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.13430","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:09953e49caaeb5c4c4ae9575c0c09f8b3eb506ff87f30a3688b9d19870e2e1f9","sha256:6310f32ef45c902c06c1f5c29870b9ad8ff43d3c7277cc810f33efc38dc3a3cc"],"state_sha256":"e90bfde70fe6e36dadf0b46168616ee04856149840e6f1d0da9987d2dd8dc71b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PmdJ5Y45Hl/2+sFZVj8pby19fdlCj/KENU9qwsBoE/8jbg89ChWcvUxWs34ss3AZA+N1hCHzpbYZ1Gkbr95kDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T15:50:00.064052Z","bundle_sha256":"352a5609731e4eb32d05c366552aecb3dbd83c4f8f59a05e4427dec21bad9852"}}