{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:KJOJIRSRTPDTGD7OKBW6GWB52J","short_pith_number":"pith:KJOJIRSR","canonical_record":{"source":{"id":"1312.7566","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-12-29T17:50:29Z","cross_cats_sorted":[],"title_canon_sha256":"f5c37d9d02b603006f1aa432160cfa00ba541fedb169c08560843162cf80e7ee","abstract_canon_sha256":"3f7a689cd04c8bc6ee054f3e8f706ec5bf576a0adc89a84360cb8261186fad87"},"schema_version":"1.0"},"canonical_sha256":"525c9446519bc7330fee506de3583dd26499b44e23cecc98c195f785b881ae72","source":{"kind":"arxiv","id":"1312.7566","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.7566","created_at":"2026-05-18T01:45:35Z"},{"alias_kind":"arxiv_version","alias_value":"1312.7566v2","created_at":"2026-05-18T01:45:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.7566","created_at":"2026-05-18T01:45:35Z"},{"alias_kind":"pith_short_12","alias_value":"KJOJIRSRTPDT","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"KJOJIRSRTPDTGD7O","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"KJOJIRSR","created_at":"2026-05-18T12:27:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:KJOJIRSRTPDTGD7OKBW6GWB52J","target":"record","payload":{"canonical_record":{"source":{"id":"1312.7566","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-12-29T17:50:29Z","cross_cats_sorted":[],"title_canon_sha256":"f5c37d9d02b603006f1aa432160cfa00ba541fedb169c08560843162cf80e7ee","abstract_canon_sha256":"3f7a689cd04c8bc6ee054f3e8f706ec5bf576a0adc89a84360cb8261186fad87"},"schema_version":"1.0"},"canonical_sha256":"525c9446519bc7330fee506de3583dd26499b44e23cecc98c195f785b881ae72","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:45:35.334127Z","signature_b64":"NtBZ6ZJAWCQ98kStFNq8tjW1yn8e2nhPjSjbY5XawL3wc/a7+qWMYwpHS4m3sUDwSUoGNioVbdwfD3+Zes1kBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"525c9446519bc7330fee506de3583dd26499b44e23cecc98c195f785b881ae72","last_reissued_at":"2026-05-18T01:45:35.333499Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:45:35.333499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.7566","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:45:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x8qypbjqkGRThabAZhKTHP1+Msh1LIYlUMnQrvf6xvKfDLBECVN6KsAC6nK48PvXYSX193aOpHSoBEanqet/Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T12:10:05.247866Z"},"content_sha256":"0ff1ad9035d55b0b4199c1304312901137bbcb6e6366638c9d19fe57414b4f81","schema_version":"1.0","event_id":"sha256:0ff1ad9035d55b0b4199c1304312901137bbcb6e6366638c9d19fe57414b4f81"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:KJOJIRSRTPDTGD7OKBW6GWB52J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tracing the past of a quantum particle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Lev Vaidman","submitted_at":"2013-12-29T17:50:29Z","abstract_excerpt":"The question: \"Where was a quantum particle between pre- and postselection measurements?\" is analyzed in view of a recent proposal that it was in the overlap of the forward and backward evolving wave functions. It is argued that this proposal corresponds not only to the criterion of where the particle leaves a weak trace, but also where the local interactions can affect the probability of postselection and where finding the particle in a strong nondemolition measurement is possible. The concept of a \"secondary presence\" of a pre- and postselected particle where local interactions affect the we"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.7566","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T01:45:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c6SY0yixakX9Tw2NNglyH92itlPmpFwGzLUJkrtonyCxV8RfSsMC1AnQCGs7Gq09YBOkxjKjcbxxr9uQURNCCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T12:10:05.248214Z"},"content_sha256":"07192834156550db0b55762ea33cd8a003db81e89c291e0a3c4ec104b825c8ac","schema_version":"1.0","event_id":"sha256:07192834156550db0b55762ea33cd8a003db81e89c291e0a3c4ec104b825c8ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KJOJIRSRTPDTGD7OKBW6GWB52J/bundle.json","state_url":"https://pith.science/pith/KJOJIRSRTPDTGD7OKBW6GWB52J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KJOJIRSRTPDTGD7OKBW6GWB52J/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":"2026-06-01T12:10:05Z","links":{"resolver":"https://pith.science/pith/KJOJIRSRTPDTGD7OKBW6GWB52J","bundle":"https://pith.science/pith/KJOJIRSRTPDTGD7OKBW6GWB52J/bundle.json","state":"https://pith.science/pith/KJOJIRSRTPDTGD7OKBW6GWB52J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KJOJIRSRTPDTGD7OKBW6GWB52J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:KJOJIRSRTPDTGD7OKBW6GWB52J","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":"3f7a689cd04c8bc6ee054f3e8f706ec5bf576a0adc89a84360cb8261186fad87","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-12-29T17:50:29Z","title_canon_sha256":"f5c37d9d02b603006f1aa432160cfa00ba541fedb169c08560843162cf80e7ee"},"schema_version":"1.0","source":{"id":"1312.7566","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.7566","created_at":"2026-05-18T01:45:35Z"},{"alias_kind":"arxiv_version","alias_value":"1312.7566v2","created_at":"2026-05-18T01:45:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.7566","created_at":"2026-05-18T01:45:35Z"},{"alias_kind":"pith_short_12","alias_value":"KJOJIRSRTPDT","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"KJOJIRSRTPDTGD7O","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"KJOJIRSR","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:07192834156550db0b55762ea33cd8a003db81e89c291e0a3c4ec104b825c8ac","target":"graph","created_at":"2026-05-18T01:45:35Z","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"},"paper":{"abstract_excerpt":"The question: \"Where was a quantum particle between pre- and postselection measurements?\" is analyzed in view of a recent proposal that it was in the overlap of the forward and backward evolving wave functions. It is argued that this proposal corresponds not only to the criterion of where the particle leaves a weak trace, but also where the local interactions can affect the probability of postselection and where finding the particle in a strong nondemolition measurement is possible. The concept of a \"secondary presence\" of a pre- and postselected particle where local interactions affect the we","authors_text":"Lev Vaidman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-12-29T17:50:29Z","title":"Tracing the past of a quantum particle"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.7566","kind":"arxiv","version":2},"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":"sha256:0ff1ad9035d55b0b4199c1304312901137bbcb6e6366638c9d19fe57414b4f81","target":"record","created_at":"2026-05-18T01:45:35Z","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":"3f7a689cd04c8bc6ee054f3e8f706ec5bf576a0adc89a84360cb8261186fad87","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-12-29T17:50:29Z","title_canon_sha256":"f5c37d9d02b603006f1aa432160cfa00ba541fedb169c08560843162cf80e7ee"},"schema_version":"1.0","source":{"id":"1312.7566","kind":"arxiv","version":2}},"canonical_sha256":"525c9446519bc7330fee506de3583dd26499b44e23cecc98c195f785b881ae72","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"525c9446519bc7330fee506de3583dd26499b44e23cecc98c195f785b881ae72","first_computed_at":"2026-05-18T01:45:35.333499Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:35.333499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NtBZ6ZJAWCQ98kStFNq8tjW1yn8e2nhPjSjbY5XawL3wc/a7+qWMYwpHS4m3sUDwSUoGNioVbdwfD3+Zes1kBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:35.334127Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.7566","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ff1ad9035d55b0b4199c1304312901137bbcb6e6366638c9d19fe57414b4f81","sha256:07192834156550db0b55762ea33cd8a003db81e89c291e0a3c4ec104b825c8ac"],"state_sha256":"19f849d4fdbbd18732880e8afc4f0383a06f3331ff21ca48ddf0b021e0870ca2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t6vDzzB2GL4pmsNplqJXxHHvefGKOGrfo9ILQlghF9q/v7Sc0MucNdCj28+C84PDNxyCBV4dt7cBC/dOxCbHBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T12:10:05.250175Z","bundle_sha256":"04222afd055c3bcb19fb05f68c8c22e0cf65bceff2fdd92428c1fd6e21457be4"}}