{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:3S6IGBNQTERO5YTIOES6MN4F4R","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":"4109b81a5ed47d341c1d3892ff6da3ba51382ed9bebdd596c8f0629eac25d046","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-05-14T14:18:49Z","title_canon_sha256":"364ab2d98ce200a98c3c25f2f21721e57c78f5733c1bc81ced199b45f3707153"},"schema_version":"1.0","source":{"id":"2605.14873","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.14873","created_at":"2026-05-17T23:38:56Z"},{"alias_kind":"arxiv_version","alias_value":"2605.14873v1","created_at":"2026-05-17T23:38:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.14873","created_at":"2026-05-17T23:38:56Z"},{"alias_kind":"pith_short_12","alias_value":"3S6IGBNQTERO","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"3S6IGBNQTERO5YTI","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"3S6IGBNQ","created_at":"2026-05-18T12:33:37Z"}],"graph_snapshots":[{"event_id":"sha256:2d95058d6cc774699c84f1c6414ce5e21af3e41204269cdeaf24513dd231e194","target":"graph","created_at":"2026-05-17T23:38:56Z","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":"Attosecond electron pulses enable real-time probing of ultrafast matter dynamics, yet conventional modulation schemes suffer from drastically shortened longitudinal focal lengths when targeting sub-attosecond durations. To address this bottleneck, we propose and demonstrate a compact scheme utilizing two counter-propagating lasers that reveals a previously unidentified stable modulation regime. Contrary to established models of ponderomotive forces and stochastic acceleration in dual-laser fields, we show that a specific parametric resonance condition permits the electron beam to be stably mod","authors_text":"Jian Zheng, Qi Huang, Qing Jia, Zhongxuan Wang","cross_cats":["physics.acc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-05-14T14:18:49Z","title":"Few-Attosecond electron pulse trains with tunable periods produced by two counter-propagating lasers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.14873","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":"sha256:607d55950931729798c7f3eb8e3641dd1da87d0a8a96f3fb883474a4f6860300","target":"record","created_at":"2026-05-17T23:38:56Z","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":"4109b81a5ed47d341c1d3892ff6da3ba51382ed9bebdd596c8f0629eac25d046","cross_cats_sorted":["physics.acc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2026-05-14T14:18:49Z","title_canon_sha256":"364ab2d98ce200a98c3c25f2f21721e57c78f5733c1bc81ced199b45f3707153"},"schema_version":"1.0","source":{"id":"2605.14873","kind":"arxiv","version":1}},"canonical_sha256":"dcbc8305b09922eee2687125e63785e445d43092336b11c168068f40552b4d6a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dcbc8305b09922eee2687125e63785e445d43092336b11c168068f40552b4d6a","first_computed_at":"2026-05-17T23:38:56.116512Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:38:56.116512Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HBQHobmc1AVlbohYGSPSM9P+2H2L646e0HrUL2GhaDJ3tLz41y3lRQ5TznwhkAbnhuoBPFcGZj+fuPCoF0X/Aw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:38:56.117245Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.14873","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:607d55950931729798c7f3eb8e3641dd1da87d0a8a96f3fb883474a4f6860300","sha256:2d95058d6cc774699c84f1c6414ce5e21af3e41204269cdeaf24513dd231e194"],"state_sha256":"c12a67c56df68de193bde8a7c7f684ed29913122a45298bc70bada7b4725d6cf"}