{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:JIOHWWAYBIMPCFL7453VJ2WVXX","short_pith_number":"pith:JIOHWWAY","canonical_record":{"source":{"id":"1007.4798","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-07-27T19:17:32Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"f805048a7975401b53946a3f29d9c22b7ce96472bf275c3fb9e3a53f8ed615b3","abstract_canon_sha256":"e0b9da61f74fa4bb398fcb4b13ae8e4aac67121d7955b057e8c40114622d7bad"},"schema_version":"1.0"},"canonical_sha256":"4a1c7b58180a18f1157fe77754ead5bdd5e1da6e0353a6393bfce44fa32c8d33","source":{"kind":"arxiv","id":"1007.4798","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.4798","created_at":"2026-05-18T03:23:48Z"},{"alias_kind":"arxiv_version","alias_value":"1007.4798v2","created_at":"2026-05-18T03:23:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.4798","created_at":"2026-05-18T03:23:48Z"},{"alias_kind":"pith_short_12","alias_value":"JIOHWWAYBIMP","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"JIOHWWAYBIMPCFL7","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"JIOHWWAY","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:JIOHWWAYBIMPCFL7453VJ2WVXX","target":"record","payload":{"canonical_record":{"source":{"id":"1007.4798","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-07-27T19:17:32Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"f805048a7975401b53946a3f29d9c22b7ce96472bf275c3fb9e3a53f8ed615b3","abstract_canon_sha256":"e0b9da61f74fa4bb398fcb4b13ae8e4aac67121d7955b057e8c40114622d7bad"},"schema_version":"1.0"},"canonical_sha256":"4a1c7b58180a18f1157fe77754ead5bdd5e1da6e0353a6393bfce44fa32c8d33","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:23:48.058328Z","signature_b64":"Y/XWYfgSeXdwvYZ3ZeJO0tF3QFC84F053dupUTZKOCCkOwrmLsJgQPZtG2FrVGCGTaObvDtvYUdDKQ8QEM2DAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a1c7b58180a18f1157fe77754ead5bdd5e1da6e0353a6393bfce44fa32c8d33","last_reissued_at":"2026-05-18T03:23:48.057435Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:23:48.057435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1007.4798","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":"2026-05-18T03:23:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HjNEo9lqJCKy4AWZwHEOJNDXav5GrjSviDKIgoYYq0/34ydSQ4GDTbXpu5G+Zr/EqIEdho1R70K9qcoksqbNDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:23:25.093225Z"},"content_sha256":"b96e59ccfef39a3263050a2a32e1f2383a07da27232e67e55711dc74c2a1d4b5","schema_version":"1.0","event_id":"sha256:b96e59ccfef39a3263050a2a32e1f2383a07da27232e67e55711dc74c2a1d4b5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:JIOHWWAYBIMPCFL7453VJ2WVXX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental generation of single photons via active multiplexing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Anton Zeilinger, Johannes Kofler, Stefan Zotter, Thomas Jennewein, Xiao-song Ma","submitted_at":"2010-07-27T19:17:32Z","abstract_excerpt":"An on-demand single-photon source is a fundamental building block in quantum science and technology. We experimentally demonstrate the proof of concept for a scheme to generate on-demand single photons via actively multiplexing several heralded photons probabilistically produced from pulsed spontaneous parametric down-conversions (SPDCs). By utilizing a four-photon-pair source, an active feed-forward technique, and an ultrafast single-photon router, we show a fourfold enhancement of the output photon rate. Simultaneously, we maintain the quality of the output single-photon states, confirmed by"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.4798","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":"2026-05-18T03:23:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cT8l8MV4ji5Rv3eBHjg9EI4j4gzVnzpdSbsn56/gcZKskw73GCeJs/zvDmNFpgQwk8pCMR1UQlfA1m9ZtserBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:23:25.093920Z"},"content_sha256":"fc6c61ad312faaa5c434989a08eea2a3e43eef6951e884923f6e94400eb4db42","schema_version":"1.0","event_id":"sha256:fc6c61ad312faaa5c434989a08eea2a3e43eef6951e884923f6e94400eb4db42"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JIOHWWAYBIMPCFL7453VJ2WVXX/bundle.json","state_url":"https://pith.science/pith/JIOHWWAYBIMPCFL7453VJ2WVXX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JIOHWWAYBIMPCFL7453VJ2WVXX/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":"2026-05-26T17:23:25Z","links":{"resolver":"https://pith.science/pith/JIOHWWAYBIMPCFL7453VJ2WVXX","bundle":"https://pith.science/pith/JIOHWWAYBIMPCFL7453VJ2WVXX/bundle.json","state":"https://pith.science/pith/JIOHWWAYBIMPCFL7453VJ2WVXX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JIOHWWAYBIMPCFL7453VJ2WVXX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:JIOHWWAYBIMPCFL7453VJ2WVXX","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":"e0b9da61f74fa4bb398fcb4b13ae8e4aac67121d7955b057e8c40114622d7bad","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-07-27T19:17:32Z","title_canon_sha256":"f805048a7975401b53946a3f29d9c22b7ce96472bf275c3fb9e3a53f8ed615b3"},"schema_version":"1.0","source":{"id":"1007.4798","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.4798","created_at":"2026-05-18T03:23:48Z"},{"alias_kind":"arxiv_version","alias_value":"1007.4798v2","created_at":"2026-05-18T03:23:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.4798","created_at":"2026-05-18T03:23:48Z"},{"alias_kind":"pith_short_12","alias_value":"JIOHWWAYBIMP","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"JIOHWWAYBIMPCFL7","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"JIOHWWAY","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:fc6c61ad312faaa5c434989a08eea2a3e43eef6951e884923f6e94400eb4db42","target":"graph","created_at":"2026-05-18T03:23:48Z","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":"An on-demand single-photon source is a fundamental building block in quantum science and technology. We experimentally demonstrate the proof of concept for a scheme to generate on-demand single photons via actively multiplexing several heralded photons probabilistically produced from pulsed spontaneous parametric down-conversions (SPDCs). By utilizing a four-photon-pair source, an active feed-forward technique, and an ultrafast single-photon router, we show a fourfold enhancement of the output photon rate. Simultaneously, we maintain the quality of the output single-photon states, confirmed by","authors_text":"Anton Zeilinger, Johannes Kofler, Stefan Zotter, Thomas Jennewein, Xiao-song Ma","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-07-27T19:17:32Z","title":"Experimental generation of single photons via active multiplexing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.4798","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:b96e59ccfef39a3263050a2a32e1f2383a07da27232e67e55711dc74c2a1d4b5","target":"record","created_at":"2026-05-18T03:23:48Z","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":"e0b9da61f74fa4bb398fcb4b13ae8e4aac67121d7955b057e8c40114622d7bad","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-07-27T19:17:32Z","title_canon_sha256":"f805048a7975401b53946a3f29d9c22b7ce96472bf275c3fb9e3a53f8ed615b3"},"schema_version":"1.0","source":{"id":"1007.4798","kind":"arxiv","version":2}},"canonical_sha256":"4a1c7b58180a18f1157fe77754ead5bdd5e1da6e0353a6393bfce44fa32c8d33","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4a1c7b58180a18f1157fe77754ead5bdd5e1da6e0353a6393bfce44fa32c8d33","first_computed_at":"2026-05-18T03:23:48.057435Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:23:48.057435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y/XWYfgSeXdwvYZ3ZeJO0tF3QFC84F053dupUTZKOCCkOwrmLsJgQPZtG2FrVGCGTaObvDtvYUdDKQ8QEM2DAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:23:48.058328Z","signed_message":"canonical_sha256_bytes"},"source_id":"1007.4798","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b96e59ccfef39a3263050a2a32e1f2383a07da27232e67e55711dc74c2a1d4b5","sha256:fc6c61ad312faaa5c434989a08eea2a3e43eef6951e884923f6e94400eb4db42"],"state_sha256":"b44a377f1cdd86d4d9bf00d966be4d8379358b01964877644284c55f40bb1172"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+ruEUQEs5HMyo4mI+uwQML2O1rWAGfD29xYM/tZPlIpxHM7FioVs0c7sLtPDnTDxTeElDjKL17YQTW1+Z44fAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T17:23:25.097400Z","bundle_sha256":"d8fb8248862897fa53d5068ab97b693ee76ac8846af738e7ef1f486f614fdc9f"}}