{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:VFU6TRR57Z2JRCRUVGKPPAECT6","short_pith_number":"pith:VFU6TRR5","canonical_record":{"source":{"id":"1210.4212","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-10-15T22:59:23Z","cross_cats_sorted":[],"title_canon_sha256":"aa0f2d41d039158b12047ab3e6d86f5001217ef7093e1749f8d677fc578f5fe8","abstract_canon_sha256":"3bea9bb4ba91eec8e8da39351ab03804499042b17a6b719fe3038436677f1645"},"schema_version":"1.0"},"canonical_sha256":"a969e9c63dfe74988a34a994f780829fb37fc70a9a4e74168543d85bab3ab09e","source":{"kind":"arxiv","id":"1210.4212","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.4212","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"arxiv_version","alias_value":"1210.4212v3","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.4212","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"pith_short_12","alias_value":"VFU6TRR57Z2J","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VFU6TRR57Z2JRCRU","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VFU6TRR5","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:VFU6TRR57Z2JRCRUVGKPPAECT6","target":"record","payload":{"canonical_record":{"source":{"id":"1210.4212","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-10-15T22:59:23Z","cross_cats_sorted":[],"title_canon_sha256":"aa0f2d41d039158b12047ab3e6d86f5001217ef7093e1749f8d677fc578f5fe8","abstract_canon_sha256":"3bea9bb4ba91eec8e8da39351ab03804499042b17a6b719fe3038436677f1645"},"schema_version":"1.0"},"canonical_sha256":"a969e9c63dfe74988a34a994f780829fb37fc70a9a4e74168543d85bab3ab09e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:20:09.559562Z","signature_b64":"y/BODBi9LG8RXDIWSRzo1FjCKb9AK0ADixwcY8O2NONCEP+ahZ9boQlqpWwQthphba3ALjtBh7yLo5mPeiJKAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a969e9c63dfe74988a34a994f780829fb37fc70a9a4e74168543d85bab3ab09e","last_reissued_at":"2026-05-18T03:20:09.558873Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:20:09.558873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.4212","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:20:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XSzJ6bCKQiPpMhM1efDNB3hbpkLaykOzkU8ntOU6IAdRWJgoReluKweY5N7nCJOl4KPSdkkIZ46fO0EmP+3qCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:53:03.721688Z"},"content_sha256":"f3c52150ea907953fdac2716a5ff348103a3f5d9f4a1608948a74b97eb803e1e","schema_version":"1.0","event_id":"sha256:f3c52150ea907953fdac2716a5ff348103a3f5d9f4a1608948a74b97eb803e1e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:VFU6TRR57Z2JRCRUVGKPPAECT6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct observation of temporal coherence by weak projective measurements of photon arrival time","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Changliang Ren, Holger F. Hofmann","submitted_at":"2012-10-15T22:59:23Z","abstract_excerpt":"We show that a weak projective measurement of photon arrival time can be realized by controllable two photon interferences with photons from short-time reference pulses at a polarization beam splitter. The weak value of the projector on the arrival time defined by the reference pulse can be obtained from the coincidence rates conditioned by a specific output measurement. If the weak measurement is followed by a measurement of frequency, the coincidence counts reveal the complete temporal coherence of the single photon wavefunction. Significantly, the weak values of the input state can also be "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.4212","kind":"arxiv","version":3},"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":"2026-05-18T03:20:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3v9LF6Rb7AFesgV1DnAUzxvjwfM50NPQRhG5B8wlUni0TMu95NWFPIobyrvUnVQuNqgJaEqjiPyl9mvWI387CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:53:03.722370Z"},"content_sha256":"6727a3c9d60f8f9181ee7e2c404dd707a546cf421bca54d13016c5fd58f1bc3b","schema_version":"1.0","event_id":"sha256:6727a3c9d60f8f9181ee7e2c404dd707a546cf421bca54d13016c5fd58f1bc3b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VFU6TRR57Z2JRCRUVGKPPAECT6/bundle.json","state_url":"https://pith.science/pith/VFU6TRR57Z2JRCRUVGKPPAECT6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VFU6TRR57Z2JRCRUVGKPPAECT6/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":"2026-05-27T16:53:03Z","links":{"resolver":"https://pith.science/pith/VFU6TRR57Z2JRCRUVGKPPAECT6","bundle":"https://pith.science/pith/VFU6TRR57Z2JRCRUVGKPPAECT6/bundle.json","state":"https://pith.science/pith/VFU6TRR57Z2JRCRUVGKPPAECT6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VFU6TRR57Z2JRCRUVGKPPAECT6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:VFU6TRR57Z2JRCRUVGKPPAECT6","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":"3bea9bb4ba91eec8e8da39351ab03804499042b17a6b719fe3038436677f1645","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-10-15T22:59:23Z","title_canon_sha256":"aa0f2d41d039158b12047ab3e6d86f5001217ef7093e1749f8d677fc578f5fe8"},"schema_version":"1.0","source":{"id":"1210.4212","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.4212","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"arxiv_version","alias_value":"1210.4212v3","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.4212","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"pith_short_12","alias_value":"VFU6TRR57Z2J","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VFU6TRR57Z2JRCRU","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VFU6TRR5","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:6727a3c9d60f8f9181ee7e2c404dd707a546cf421bca54d13016c5fd58f1bc3b","target":"graph","created_at":"2026-05-18T03:20:09Z","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":"We show that a weak projective measurement of photon arrival time can be realized by controllable two photon interferences with photons from short-time reference pulses at a polarization beam splitter. The weak value of the projector on the arrival time defined by the reference pulse can be obtained from the coincidence rates conditioned by a specific output measurement. If the weak measurement is followed by a measurement of frequency, the coincidence counts reveal the complete temporal coherence of the single photon wavefunction. Significantly, the weak values of the input state can also be ","authors_text":"Changliang Ren, Holger F. Hofmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-10-15T22:59:23Z","title":"Direct observation of temporal coherence by weak projective measurements of photon arrival time"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.4212","kind":"arxiv","version":3},"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:f3c52150ea907953fdac2716a5ff348103a3f5d9f4a1608948a74b97eb803e1e","target":"record","created_at":"2026-05-18T03:20:09Z","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":"3bea9bb4ba91eec8e8da39351ab03804499042b17a6b719fe3038436677f1645","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-10-15T22:59:23Z","title_canon_sha256":"aa0f2d41d039158b12047ab3e6d86f5001217ef7093e1749f8d677fc578f5fe8"},"schema_version":"1.0","source":{"id":"1210.4212","kind":"arxiv","version":3}},"canonical_sha256":"a969e9c63dfe74988a34a994f780829fb37fc70a9a4e74168543d85bab3ab09e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a969e9c63dfe74988a34a994f780829fb37fc70a9a4e74168543d85bab3ab09e","first_computed_at":"2026-05-18T03:20:09.558873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:20:09.558873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y/BODBi9LG8RXDIWSRzo1FjCKb9AK0ADixwcY8O2NONCEP+ahZ9boQlqpWwQthphba3ALjtBh7yLo5mPeiJKAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:20:09.559562Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.4212","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f3c52150ea907953fdac2716a5ff348103a3f5d9f4a1608948a74b97eb803e1e","sha256:6727a3c9d60f8f9181ee7e2c404dd707a546cf421bca54d13016c5fd58f1bc3b"],"state_sha256":"654f2a7efc17a4f88b33ad4ee2e86dfb6e09c2cf854c4075e55911cde359f703"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tMdLdJrGRQg2tKfhHN8m6JOF82X80mAtk9GxHwj/IK9qHMWPn1g6AMVpRbHiAVyCoEWxztfe2+Dr/f35b8mPBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:53:03.726031Z","bundle_sha256":"3c2d4c41487d13bf8e9152f9bfeef12b5e034ddbab0d4c106eee23f4be7ca705"}}