{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:GNKWCV5CIZE5ACGRTEDNCYKDQS","short_pith_number":"pith:GNKWCV5C","canonical_record":{"source":{"id":"1405.6251","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-24T00:50:14Z","cross_cats_sorted":[],"title_canon_sha256":"51431f135afc3bd683d0f7dea5aa8247a51e43c06051c02df3228258e1dd34af","abstract_canon_sha256":"3f4cfe2f612a99666aafb90891b007f0af3e27f486e4bc984abc0caf35882b35"},"schema_version":"1.0"},"canonical_sha256":"33556157a24649d008d19906d1614384bc44ae24e80e69f916e6f8ac476e4d6f","source":{"kind":"arxiv","id":"1405.6251","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.6251","created_at":"2026-05-18T01:55:53Z"},{"alias_kind":"arxiv_version","alias_value":"1405.6251v4","created_at":"2026-05-18T01:55:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.6251","created_at":"2026-05-18T01:55:53Z"},{"alias_kind":"pith_short_12","alias_value":"GNKWCV5CIZE5","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"GNKWCV5CIZE5ACGR","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"GNKWCV5C","created_at":"2026-05-18T12:28:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:GNKWCV5CIZE5ACGRTEDNCYKDQS","target":"record","payload":{"canonical_record":{"source":{"id":"1405.6251","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-24T00:50:14Z","cross_cats_sorted":[],"title_canon_sha256":"51431f135afc3bd683d0f7dea5aa8247a51e43c06051c02df3228258e1dd34af","abstract_canon_sha256":"3f4cfe2f612a99666aafb90891b007f0af3e27f486e4bc984abc0caf35882b35"},"schema_version":"1.0"},"canonical_sha256":"33556157a24649d008d19906d1614384bc44ae24e80e69f916e6f8ac476e4d6f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:53.444967Z","signature_b64":"7J5y2TJu1ekSmNCgxJ7ifWIM/suynNbF4eilL+tOpS9pshZZ5pzrIopJjlTWsCjXNKGacwBptNvdSq3NviK8CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33556157a24649d008d19906d1614384bc44ae24e80e69f916e6f8ac476e4d6f","last_reissued_at":"2026-05-18T01:55:53.444346Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:53.444346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1405.6251","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:55:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wcv/5AxJ0jWuz5GTDxBzjCJomy6Le3nOLXIv8DRdnFX47QnMZp2rjejsSdPCRPP4rmiAVPPo+yw1MwsDRFr4Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:39:38.678702Z"},"content_sha256":"001dc86b3bb356d8d99e48ea76155d92a365d4bf798ee75c6fe2205d727c3ac7","schema_version":"1.0","event_id":"sha256:001dc86b3bb356d8d99e48ea76155d92a365d4bf798ee75c6fe2205d727c3ac7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:GNKWCV5CIZE5ACGRTEDNCYKDQS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Complete temporal characterization of a single photon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Adarsh S. Prasad, A. I. Lvovsky, A. Lezama, Andrew MacRae, Travis Brannan, Zhongzhong Qin","submitted_at":"2014-05-24T00:50:14Z","abstract_excerpt":"Precise information about the temporal mode of optical states is crucial for optimizing their interaction efficiency between themselves and/or with matter in various quantum communication devices. Here we propose and experimentally demonstrate a method of determining both the real and imaginary components of a single photon's temporal density matrix by measuring the autocorrelation function of the photocurrent from a balanced homodyne detector at multiple local oscillator frequencies. We test our method on single photons heralded from biphotons generated via four-wave mixing in an atomic vapor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.6251","kind":"arxiv","version":4},"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":"2026-05-18T01:55:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xGSR+3kKUlLrnhu6SZnLmL7vzERD4aIN19TomUk9kZxUbf22RHa6r27cNCoL6Ic5dwadKzBbxfXvkBoePLI8AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:39:38.679426Z"},"content_sha256":"88e7e39cac4fe0d84faa7c61c14c561f4f7dc58b530f0f44115b8fe41fd0fe20","schema_version":"1.0","event_id":"sha256:88e7e39cac4fe0d84faa7c61c14c561f4f7dc58b530f0f44115b8fe41fd0fe20"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GNKWCV5CIZE5ACGRTEDNCYKDQS/bundle.json","state_url":"https://pith.science/pith/GNKWCV5CIZE5ACGRTEDNCYKDQS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GNKWCV5CIZE5ACGRTEDNCYKDQS/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":"2026-05-26T10:39:38Z","links":{"resolver":"https://pith.science/pith/GNKWCV5CIZE5ACGRTEDNCYKDQS","bundle":"https://pith.science/pith/GNKWCV5CIZE5ACGRTEDNCYKDQS/bundle.json","state":"https://pith.science/pith/GNKWCV5CIZE5ACGRTEDNCYKDQS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GNKWCV5CIZE5ACGRTEDNCYKDQS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:GNKWCV5CIZE5ACGRTEDNCYKDQS","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":"3f4cfe2f612a99666aafb90891b007f0af3e27f486e4bc984abc0caf35882b35","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-24T00:50:14Z","title_canon_sha256":"51431f135afc3bd683d0f7dea5aa8247a51e43c06051c02df3228258e1dd34af"},"schema_version":"1.0","source":{"id":"1405.6251","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.6251","created_at":"2026-05-18T01:55:53Z"},{"alias_kind":"arxiv_version","alias_value":"1405.6251v4","created_at":"2026-05-18T01:55:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.6251","created_at":"2026-05-18T01:55:53Z"},{"alias_kind":"pith_short_12","alias_value":"GNKWCV5CIZE5","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"GNKWCV5CIZE5ACGR","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"GNKWCV5C","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:88e7e39cac4fe0d84faa7c61c14c561f4f7dc58b530f0f44115b8fe41fd0fe20","target":"graph","created_at":"2026-05-18T01:55:53Z","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":"Precise information about the temporal mode of optical states is crucial for optimizing their interaction efficiency between themselves and/or with matter in various quantum communication devices. Here we propose and experimentally demonstrate a method of determining both the real and imaginary components of a single photon's temporal density matrix by measuring the autocorrelation function of the photocurrent from a balanced homodyne detector at multiple local oscillator frequencies. We test our method on single photons heralded from biphotons generated via four-wave mixing in an atomic vapor","authors_text":"Adarsh S. Prasad, A. I. Lvovsky, A. Lezama, Andrew MacRae, Travis Brannan, Zhongzhong Qin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-24T00:50:14Z","title":"Complete temporal characterization of a single photon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.6251","kind":"arxiv","version":4},"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":"sha256:001dc86b3bb356d8d99e48ea76155d92a365d4bf798ee75c6fe2205d727c3ac7","target":"record","created_at":"2026-05-18T01:55:53Z","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":"3f4cfe2f612a99666aafb90891b007f0af3e27f486e4bc984abc0caf35882b35","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-05-24T00:50:14Z","title_canon_sha256":"51431f135afc3bd683d0f7dea5aa8247a51e43c06051c02df3228258e1dd34af"},"schema_version":"1.0","source":{"id":"1405.6251","kind":"arxiv","version":4}},"canonical_sha256":"33556157a24649d008d19906d1614384bc44ae24e80e69f916e6f8ac476e4d6f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33556157a24649d008d19906d1614384bc44ae24e80e69f916e6f8ac476e4d6f","first_computed_at":"2026-05-18T01:55:53.444346Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:53.444346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7J5y2TJu1ekSmNCgxJ7ifWIM/suynNbF4eilL+tOpS9pshZZ5pzrIopJjlTWsCjXNKGacwBptNvdSq3NviK8CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:53.444967Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.6251","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:001dc86b3bb356d8d99e48ea76155d92a365d4bf798ee75c6fe2205d727c3ac7","sha256:88e7e39cac4fe0d84faa7c61c14c561f4f7dc58b530f0f44115b8fe41fd0fe20"],"state_sha256":"a6550eba0797e970f2f8541f466b79b9475847ab52386914e086f557e0783c98"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LOQU99E5nM2MmewfZ7LjeKCkHuxom2+t3w+4z3fPnZyzPO5uL26GPOYqPnLgKMtGmLLDcC/HLLQnOBOqe9u9Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T10:39:38.683189Z","bundle_sha256":"550d06db8c4c5b391b28e855955d7a0e02a647eacb7fdeb95fe8d6fddec7154b"}}