{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:JOWUH4FYH35DCIWWD3YQCEU5OX","short_pith_number":"pith:JOWUH4FY","canonical_record":{"source":{"id":"1807.11775","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-31T11:59:03Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"c7b42760891a65a7b1946115fb8efe6c2e1e8f35fa16c5d08be5b704456899d2","abstract_canon_sha256":"b69ba6c945505f15cf9c0acc71c265c2590ec845db8a57a3b56d79affe33afa9"},"schema_version":"1.0"},"canonical_sha256":"4bad43f0b83efa3122d61ef101129d75fc671a0a145ba1a0d0e39e2ed9eabfdc","source":{"kind":"arxiv","id":"1807.11775","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.11775","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"arxiv_version","alias_value":"1807.11775v1","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.11775","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"pith_short_12","alias_value":"JOWUH4FYH35D","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JOWUH4FYH35DCIWW","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JOWUH4FY","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:JOWUH4FYH35DCIWWD3YQCEU5OX","target":"record","payload":{"canonical_record":{"source":{"id":"1807.11775","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-31T11:59:03Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"c7b42760891a65a7b1946115fb8efe6c2e1e8f35fa16c5d08be5b704456899d2","abstract_canon_sha256":"b69ba6c945505f15cf9c0acc71c265c2590ec845db8a57a3b56d79affe33afa9"},"schema_version":"1.0"},"canonical_sha256":"4bad43f0b83efa3122d61ef101129d75fc671a0a145ba1a0d0e39e2ed9eabfdc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:45:37.338422Z","signature_b64":"3JP5F7j+RJt4Gk4YqdGxMpBO9Eop2m3qlPgWe4FiR7jdELEIU2HGdJy6uREDaACATtP0huBKK5eD6iLuvhShCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4bad43f0b83efa3122d61ef101129d75fc671a0a145ba1a0d0e39e2ed9eabfdc","last_reissued_at":"2026-05-17T23:45:37.337633Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:45:37.337633Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.11775","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":"2026-05-17T23:45:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GX1YmGEjYvlfTnf4bFpABXdEyuz/By9rz83xREepFt/CKDWNuhX/SOGpzX4yavMHpNcfZmJcWNAy1zvmOvs/Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T21:11:10.055927Z"},"content_sha256":"acf9dd852af86322d0ba29d1ddecfcd130d8f94ce9198434200c1e5d91a8ab84","schema_version":"1.0","event_id":"sha256:acf9dd852af86322d0ba29d1ddecfcd130d8f94ce9198434200c1e5d91a8ab84"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:JOWUH4FYH35DCIWWD3YQCEU5OX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Coherent control of superradiance from nitrogen ions pumped with femtosecond pulses","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"physics.optics","authors_text":"An Zhang, Chengyin Wu, Hongbing Jiang, Luqi Yuan, Mingwei Lei, Qihuang Gong, Qingqing Liang, Songlin Zhuang, Xiang Zhang, Yi Liu, Zhengquan Fan","submitted_at":"2018-07-31T11:59:03Z","abstract_excerpt":"Singly ionized nitrogen molecules in ambient air pumped by near-infrared femtosecond laser give rise to superradiant emission. Here we demonstrate coherent control of this superradiance by injecting a pair of resonant seeding pulses inside the nitrogen gas plasma. Strong modulation of the 391.4 nm superradiance with a period of 1.3 fs is observed when the delay between the two seeding pulses are finely tuned, pinpointing the essential role of macroscopic coherence in this lasing process. Based on this time-resolved method, the complex temporal evolution of the macroscopic coherence between two"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.11775","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":"2026-05-17T23:45:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VO62SsGFn3P0Kbpfhl3ZkbVWPMwNVE/Z9jg8Pfsbmb7YbYwwPKCEVCLjzV9o1eIbA3CLRPx9eEM2PkqeEzDmBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T21:11:10.056617Z"},"content_sha256":"8e5f6986d0a714bb84e6dfffdf5f2b2019eb4747f168aff6b838dbfed311f8eb","schema_version":"1.0","event_id":"sha256:8e5f6986d0a714bb84e6dfffdf5f2b2019eb4747f168aff6b838dbfed311f8eb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JOWUH4FYH35DCIWWD3YQCEU5OX/bundle.json","state_url":"https://pith.science/pith/JOWUH4FYH35DCIWWD3YQCEU5OX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JOWUH4FYH35DCIWWD3YQCEU5OX/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":"2026-05-29T21:11:10Z","links":{"resolver":"https://pith.science/pith/JOWUH4FYH35DCIWWD3YQCEU5OX","bundle":"https://pith.science/pith/JOWUH4FYH35DCIWWD3YQCEU5OX/bundle.json","state":"https://pith.science/pith/JOWUH4FYH35DCIWWD3YQCEU5OX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JOWUH4FYH35DCIWWD3YQCEU5OX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:JOWUH4FYH35DCIWWD3YQCEU5OX","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":"b69ba6c945505f15cf9c0acc71c265c2590ec845db8a57a3b56d79affe33afa9","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-31T11:59:03Z","title_canon_sha256":"c7b42760891a65a7b1946115fb8efe6c2e1e8f35fa16c5d08be5b704456899d2"},"schema_version":"1.0","source":{"id":"1807.11775","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.11775","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"arxiv_version","alias_value":"1807.11775v1","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.11775","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"pith_short_12","alias_value":"JOWUH4FYH35D","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JOWUH4FYH35DCIWW","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JOWUH4FY","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:8e5f6986d0a714bb84e6dfffdf5f2b2019eb4747f168aff6b838dbfed311f8eb","target":"graph","created_at":"2026-05-17T23:45:37Z","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":"Singly ionized nitrogen molecules in ambient air pumped by near-infrared femtosecond laser give rise to superradiant emission. Here we demonstrate coherent control of this superradiance by injecting a pair of resonant seeding pulses inside the nitrogen gas plasma. Strong modulation of the 391.4 nm superradiance with a period of 1.3 fs is observed when the delay between the two seeding pulses are finely tuned, pinpointing the essential role of macroscopic coherence in this lasing process. Based on this time-resolved method, the complex temporal evolution of the macroscopic coherence between two","authors_text":"An Zhang, Chengyin Wu, Hongbing Jiang, Luqi Yuan, Mingwei Lei, Qihuang Gong, Qingqing Liang, Songlin Zhuang, Xiang Zhang, Yi Liu, Zhengquan Fan","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-31T11:59:03Z","title":"Coherent control of superradiance from nitrogen ions pumped with femtosecond pulses"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.11775","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:acf9dd852af86322d0ba29d1ddecfcd130d8f94ce9198434200c1e5d91a8ab84","target":"record","created_at":"2026-05-17T23:45:37Z","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":"b69ba6c945505f15cf9c0acc71c265c2590ec845db8a57a3b56d79affe33afa9","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-31T11:59:03Z","title_canon_sha256":"c7b42760891a65a7b1946115fb8efe6c2e1e8f35fa16c5d08be5b704456899d2"},"schema_version":"1.0","source":{"id":"1807.11775","kind":"arxiv","version":1}},"canonical_sha256":"4bad43f0b83efa3122d61ef101129d75fc671a0a145ba1a0d0e39e2ed9eabfdc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4bad43f0b83efa3122d61ef101129d75fc671a0a145ba1a0d0e39e2ed9eabfdc","first_computed_at":"2026-05-17T23:45:37.337633Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:37.337633Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3JP5F7j+RJt4Gk4YqdGxMpBO9Eop2m3qlPgWe4FiR7jdELEIU2HGdJy6uREDaACATtP0huBKK5eD6iLuvhShCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:37.338422Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.11775","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:acf9dd852af86322d0ba29d1ddecfcd130d8f94ce9198434200c1e5d91a8ab84","sha256:8e5f6986d0a714bb84e6dfffdf5f2b2019eb4747f168aff6b838dbfed311f8eb"],"state_sha256":"f3d28e278a1b6995231bf76af64f75eff5c616e0f740b675b124c703b7daeaac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/rAc3xwT20ADLFIDTihAT4GwWYCPfyIiJ6090MmpVrThiJEZmFN08BAeEjpwIw/JFKdHzqtF+Wo+9pUzTW/wAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T21:11:10.059964Z","bundle_sha256":"78b417e82d4b9fd8d0caec18e1bd8b23ce8052b6238a2d5ed99059914b134c40"}}