{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:R4FHELIC3F5RMXFEKXZLRLPUNA","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":"5767779c8007220189da3bc8301a505ed6c2a5e6f9702b8e8a0c6c3cbca90630","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2022-08-19T17:38:27Z","title_canon_sha256":"38d24dc6ad623067fef816db56ba75f193f1c8329781f34ee3e94b922af76e6f"},"schema_version":"1.0","source":{"id":"2208.09461","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.09461","created_at":"2026-07-05T06:51:19Z"},{"alias_kind":"arxiv_version","alias_value":"2208.09461v2","created_at":"2026-07-05T06:51:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.09461","created_at":"2026-07-05T06:51:19Z"},{"alias_kind":"pith_short_12","alias_value":"R4FHELIC3F5R","created_at":"2026-07-05T06:51:19Z"},{"alias_kind":"pith_short_16","alias_value":"R4FHELIC3F5RMXFE","created_at":"2026-07-05T06:51:19Z"},{"alias_kind":"pith_short_8","alias_value":"R4FHELIC","created_at":"2026-07-05T06:51:19Z"}],"graph_snapshots":[{"event_id":"sha256:faf194b933723ae3e6e7a282d24ad4a5e61e182e7ef1f56da3369dcf15ed5c29","target":"graph","created_at":"2026-07-05T06:51:19Z","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/2208.09461/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Many models of flocking involve alignment rules based on the mean orientation of neighboring particles, which we show introduces microscopic non-reciprocal interactions. In the absence of this microscopic non-reciprocity an exceptional phase transition is predicted at low noise strength within the Toner-Tu framework of polar aligning matter; we demonstrate this transition via large-scale numerical simulations. By coarse-graining the microscopic non-reciprocal forces found in more common models of flocking, we identify additional terms in a hydrodynamic description which lead to a highly ordere","authors_text":"Charles Packard, Daniel M. Sussman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2022-08-19T17:38:27Z","title":"Non-reciprocal forces and exceptional phase transitions in metric and topological flocks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.09461","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":"sha256:95826bf1278359b30b920471bd2d0f1fca459b7226740e1d628b4a86d370e22f","target":"record","created_at":"2026-07-05T06:51:19Z","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":"5767779c8007220189da3bc8301a505ed6c2a5e6f9702b8e8a0c6c3cbca90630","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2022-08-19T17:38:27Z","title_canon_sha256":"38d24dc6ad623067fef816db56ba75f193f1c8329781f34ee3e94b922af76e6f"},"schema_version":"1.0","source":{"id":"2208.09461","kind":"arxiv","version":2}},"canonical_sha256":"8f0a722d02d97b165ca455f2b8adf46814666b58f19fcb3746e1569d4040cb17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f0a722d02d97b165ca455f2b8adf46814666b58f19fcb3746e1569d4040cb17","first_computed_at":"2026-07-05T06:51:19.107195Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:51:19.107195Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c6Okmam5NlXnJG4W/UChTVlol/UBjsLMRutN/gy/S/Wru/9wqYPZIyyTM5oJQiY4qjnjDeLlMjlQiuSIQXHrDg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:51:19.107888Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.09461","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:95826bf1278359b30b920471bd2d0f1fca459b7226740e1d628b4a86d370e22f","sha256:faf194b933723ae3e6e7a282d24ad4a5e61e182e7ef1f56da3369dcf15ed5c29"],"state_sha256":"eaa2b8ddc80055488477d91cccb373d78c59778873f542ec7c74a6d1a0d5a51f"}