{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:EFABCTY3R6LGOKQIA7GP5UIMA7","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":"cd89867fabb4b2fb16614a2e35e4b0a0b4bfd4caf743bd2901d542ed2da002c8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2021-05-05T08:06:36Z","title_canon_sha256":"93df19cf1134cd32496943a8af11e109433c47b438b9500ee599ac7d27c8bfed"},"schema_version":"1.0","source":{"id":"2105.01918","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.01918","created_at":"2026-07-05T03:10:31Z"},{"alias_kind":"arxiv_version","alias_value":"2105.01918v1","created_at":"2026-07-05T03:10:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.01918","created_at":"2026-07-05T03:10:31Z"},{"alias_kind":"pith_short_12","alias_value":"EFABCTY3R6LG","created_at":"2026-07-05T03:10:31Z"},{"alias_kind":"pith_short_16","alias_value":"EFABCTY3R6LGOKQI","created_at":"2026-07-05T03:10:31Z"},{"alias_kind":"pith_short_8","alias_value":"EFABCTY3","created_at":"2026-07-05T03:10:31Z"}],"graph_snapshots":[{"event_id":"sha256:b4a718e88d6a39f3dcd2ad718eb9d47f090305e6fa806a6e7d92cc24d3bc9231","target":"graph","created_at":"2026-07-05T03:10:31Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2105.01918/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Clusters and nanodroplets hold the promise of enhancing high-order nonlinear optical effects due to their high local density. However, only moderate enhancement has been demonstrated to date. Here, we report the observation of energetic electrons generated by above-threshold ionization (ATI) of helium (He) nanodroplets which are resonantly excited by ultrashort extreme ultraviolet (XUV) free-electron laser pulses and subsequently ionized by near-infrared (NIR) or near-ultraviolet (UV) pulses. The electron emission due to high-order ATI is enhanced by several orders of magnitude compared to He ","authors_text":"A. C. LaForge, A. Wituschek, C. Callegari, F. Stienkemeier, K. C. Prince, L. B. Madsen, L. Bruder, M. Abu-samha, M. Binz, M. Danailov, M. Di Fraia, M. Manfredda, M. Mudrich, M. Zangrando, O. Plekan, P. Rebernik, R. Duim, R. Feifel, R. J. Squibb, R. Michiels, U. Bangert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2021-05-05T08:06:36Z","title":"Collective enhancement of above threshold ionization by resonantly excited helium nanodroplets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.01918","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":"sha256:2a22ee39f1cc7243c72a6ae347941d8969709108c345b8a5e302c1ce5665d961","target":"record","created_at":"2026-07-05T03:10:31Z","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":"cd89867fabb4b2fb16614a2e35e4b0a0b4bfd4caf743bd2901d542ed2da002c8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atm-clus","submitted_at":"2021-05-05T08:06:36Z","title_canon_sha256":"93df19cf1134cd32496943a8af11e109433c47b438b9500ee599ac7d27c8bfed"},"schema_version":"1.0","source":{"id":"2105.01918","kind":"arxiv","version":1}},"canonical_sha256":"2140114f1b8f96672a0807ccfed10c07e4704f5dd5ee4c80c68cb43f113d4d9c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2140114f1b8f96672a0807ccfed10c07e4704f5dd5ee4c80c68cb43f113d4d9c","first_computed_at":"2026-07-05T03:10:31.321433Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:10:31.321433Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QC4KYBSlSbcET/lwlnNtuNZu1gTu166hZKA7SX5up5CqKF7WSJdPKQs+Co7ef2aMAguBodV3QYyNpT1Aa7RnDg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:10:31.321898Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.01918","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a22ee39f1cc7243c72a6ae347941d8969709108c345b8a5e302c1ce5665d961","sha256:b4a718e88d6a39f3dcd2ad718eb9d47f090305e6fa806a6e7d92cc24d3bc9231"],"state_sha256":"aad57216d387b1c9528a5b553bade5828387ceaed0bcc746dc9d197b31b4d7ea"}