{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:MTDTQYDZ6QNYILNCBV5CU36TBP","short_pith_number":"pith:MTDTQYDZ","canonical_record":{"source":{"id":"1508.01029","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-05T10:33:20Z","cross_cats_sorted":[],"title_canon_sha256":"1c8dd46b71ba6526f32df403d0b134bdba401f0b2b085634370c4f7699a25963","abstract_canon_sha256":"186ba45bb2139e9da29e49a55cbf535826bc1bf9a91436c43690f698290d1e49"},"schema_version":"1.0"},"canonical_sha256":"64c7386079f41b842da20d7a2a6fd30bdf1ef3eefc6d4f83404a789a10257585","source":{"kind":"arxiv","id":"1508.01029","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.01029","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"arxiv_version","alias_value":"1508.01029v1","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.01029","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"pith_short_12","alias_value":"MTDTQYDZ6QNY","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MTDTQYDZ6QNYILNC","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MTDTQYDZ","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:MTDTQYDZ6QNYILNCBV5CU36TBP","target":"record","payload":{"canonical_record":{"source":{"id":"1508.01029","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-05T10:33:20Z","cross_cats_sorted":[],"title_canon_sha256":"1c8dd46b71ba6526f32df403d0b134bdba401f0b2b085634370c4f7699a25963","abstract_canon_sha256":"186ba45bb2139e9da29e49a55cbf535826bc1bf9a91436c43690f698290d1e49"},"schema_version":"1.0"},"canonical_sha256":"64c7386079f41b842da20d7a2a6fd30bdf1ef3eefc6d4f83404a789a10257585","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:43.826742Z","signature_b64":"3tfTqexRYjUwhUTIIKtnVeFEujvMnMhGB3NCHpgayjxJZXiBktQeuQJfsymBxg9eXC6RMJuWA8uJ++miLo02CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"64c7386079f41b842da20d7a2a6fd30bdf1ef3eefc6d4f83404a789a10257585","last_reissued_at":"2026-05-18T01:18:43.826103Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:43.826103Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.01029","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":"2026-05-18T01:18:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n039uSJ/PFPvzSY3l9nM3JSrIsXMWgvz7PYL66boRJ7UDcBgHAGwuIy7AXL4VLWEAVzXFZHITNSfznMBdjs3Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T18:28:48.368282Z"},"content_sha256":"6f49901bb347d4d6b185c618724ac7a9f36ff2511c9072a10cbabe6ebf6d47ee","schema_version":"1.0","event_id":"sha256:6f49901bb347d4d6b185c618724ac7a9f36ff2511c9072a10cbabe6ebf6d47ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:MTDTQYDZ6QNYILNCBV5CU36TBP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Doubly-heralded single-photon absorption by a single atom","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jos\\'e Brito, J\\\"urgen Eschner, Pascal Eich, Philipp M\\\"uller, Stephan Kucera","submitted_at":"2015-08-05T10:33:20Z","abstract_excerpt":"We report on a single-photon-to-single-atom interface, where a single photon generated by Spontaneous Parametric Down Conversion (SPDC) is absorbed by a single trapped ion. The photon is heralded by its time-correlated partner generated in the SPDC process, while the absorption event is heralded by a single photon emitted in its course. Coincidence detection marks doubly-heralded absorption, enabling photon-to-atom quantum state transfer [1, 2]. Background in the coincidence measurement is strongly suppressed by a new method that discriminates real absorption events from dark count-induced coi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.01029","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":""},"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":"2026-05-18T01:18:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NH1HHYfqVtPjjS70rwebRPJ0ZnFkqA1SyXWXLGpIb+JfdcPL4pf8jn6ChHRYr6RmTFDywtlOtFiJ7kbVWhR+Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T18:28:48.368947Z"},"content_sha256":"44f6fd3f1757176497f84bd205f5cfdfd9c5bf2955aa0751017281e4af34f65a","schema_version":"1.0","event_id":"sha256:44f6fd3f1757176497f84bd205f5cfdfd9c5bf2955aa0751017281e4af34f65a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MTDTQYDZ6QNYILNCBV5CU36TBP/bundle.json","state_url":"https://pith.science/pith/MTDTQYDZ6QNYILNCBV5CU36TBP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MTDTQYDZ6QNYILNCBV5CU36TBP/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":"2026-06-08T18:28:48Z","links":{"resolver":"https://pith.science/pith/MTDTQYDZ6QNYILNCBV5CU36TBP","bundle":"https://pith.science/pith/MTDTQYDZ6QNYILNCBV5CU36TBP/bundle.json","state":"https://pith.science/pith/MTDTQYDZ6QNYILNCBV5CU36TBP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MTDTQYDZ6QNYILNCBV5CU36TBP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MTDTQYDZ6QNYILNCBV5CU36TBP","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":"186ba45bb2139e9da29e49a55cbf535826bc1bf9a91436c43690f698290d1e49","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-05T10:33:20Z","title_canon_sha256":"1c8dd46b71ba6526f32df403d0b134bdba401f0b2b085634370c4f7699a25963"},"schema_version":"1.0","source":{"id":"1508.01029","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.01029","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"arxiv_version","alias_value":"1508.01029v1","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.01029","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"pith_short_12","alias_value":"MTDTQYDZ6QNY","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MTDTQYDZ6QNYILNC","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MTDTQYDZ","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:44f6fd3f1757176497f84bd205f5cfdfd9c5bf2955aa0751017281e4af34f65a","target":"graph","created_at":"2026-05-18T01:18:43Z","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 report on a single-photon-to-single-atom interface, where a single photon generated by Spontaneous Parametric Down Conversion (SPDC) is absorbed by a single trapped ion. The photon is heralded by its time-correlated partner generated in the SPDC process, while the absorption event is heralded by a single photon emitted in its course. Coincidence detection marks doubly-heralded absorption, enabling photon-to-atom quantum state transfer [1, 2]. Background in the coincidence measurement is strongly suppressed by a new method that discriminates real absorption events from dark count-induced coi","authors_text":"Jos\\'e Brito, J\\\"urgen Eschner, Pascal Eich, Philipp M\\\"uller, Stephan Kucera","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-05T10:33:20Z","title":"Doubly-heralded single-photon absorption by a single atom"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.01029","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":"sha256:6f49901bb347d4d6b185c618724ac7a9f36ff2511c9072a10cbabe6ebf6d47ee","target":"record","created_at":"2026-05-18T01:18:43Z","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":"186ba45bb2139e9da29e49a55cbf535826bc1bf9a91436c43690f698290d1e49","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-08-05T10:33:20Z","title_canon_sha256":"1c8dd46b71ba6526f32df403d0b134bdba401f0b2b085634370c4f7699a25963"},"schema_version":"1.0","source":{"id":"1508.01029","kind":"arxiv","version":1}},"canonical_sha256":"64c7386079f41b842da20d7a2a6fd30bdf1ef3eefc6d4f83404a789a10257585","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"64c7386079f41b842da20d7a2a6fd30bdf1ef3eefc6d4f83404a789a10257585","first_computed_at":"2026-05-18T01:18:43.826103Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:43.826103Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3tfTqexRYjUwhUTIIKtnVeFEujvMnMhGB3NCHpgayjxJZXiBktQeuQJfsymBxg9eXC6RMJuWA8uJ++miLo02CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:43.826742Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.01029","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f49901bb347d4d6b185c618724ac7a9f36ff2511c9072a10cbabe6ebf6d47ee","sha256:44f6fd3f1757176497f84bd205f5cfdfd9c5bf2955aa0751017281e4af34f65a"],"state_sha256":"10e81b0c345f87b6394cda97b0524d2663ab0c3eddf0d35837f5f02f120d4303"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oenf+AdPs0UKzaVSVF4kOGb9aucfHLCoc1tFEILQsNIRxpYbpi+Lacrju6H5UtutU5VkS1a3QC+xKZqVjNZFDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T18:28:48.372534Z","bundle_sha256":"0a9bc0b881e02655a260ee0510f74a83d3be4a3e2f8b73958964f2e4ce0a171d"}}