{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:BHBPNZPF3UHW2ODLFDPWCTSKCM","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":"00528c52dd6c4d9e630f549fc13212a3521b3b2f15cadd56d1f397ea696a71ae","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.class-ph","submitted_at":"2026-07-27T05:03:15Z","title_canon_sha256":"c5fee56020d24358f20b9bcba737644182b70ca04d28303920b31b66681d592a"},"schema_version":"1.0","source":{"id":"2607.27242","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.27242","created_at":"2026-07-31T00:10:24Z"},{"alias_kind":"arxiv_version","alias_value":"2607.27242v1","created_at":"2026-07-31T00:10:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.27242","created_at":"2026-07-31T00:10:24Z"},{"alias_kind":"pith_short_12","alias_value":"BHBPNZPF3UHW","created_at":"2026-07-31T00:10:24Z"},{"alias_kind":"pith_short_16","alias_value":"BHBPNZPF3UHW2ODL","created_at":"2026-07-31T00:10:24Z"},{"alias_kind":"pith_short_8","alias_value":"BHBPNZPF","created_at":"2026-07-31T00:10:24Z"}],"graph_snapshots":[{"event_id":"sha256:88a5f070f541a3e92354d6fb23fcc104dfb7a7e20ce90b12a5140ca99ef706a4","target":"graph","created_at":"2026-07-31T00:10:24Z","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/2607.27242/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Parametric resonance underpins the operation of a wide range of physical systems, from nanomechanical resonators to quantum-information systems and Ising machines. As an archetypal class of driven-dissipative systems, parametric oscillators are generally expected to exhibit a single pair of stable period-two states with opposite phases. This bistable behavior enables both the simulation of spin Hamiltonians and the preparation of superconducting cat states. Whether multiple pairs of such states can coexist in a single oscillator, however, remains an open question. Here, we show experimentally ","authors_text":"H. B. Chan, L. Huang, M. I. Dykman, P. Y. Chan, X. Dong","cross_cats":["cond-mat.mes-hall","quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.class-ph","submitted_at":"2026-07-27T05:03:15Z","title":"Multibranched parametric resonance and swallowtail catastrophe in electromechanical oscillators with nonlinear friction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.27242","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":"sha256:07ce6cf41fb4595b465fcd005405918540a80543b7a29d7ebbfaacdad6794b04","target":"record","created_at":"2026-07-31T00:10:24Z","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":"00528c52dd6c4d9e630f549fc13212a3521b3b2f15cadd56d1f397ea696a71ae","cross_cats_sorted":["cond-mat.mes-hall","quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.class-ph","submitted_at":"2026-07-27T05:03:15Z","title_canon_sha256":"c5fee56020d24358f20b9bcba737644182b70ca04d28303920b31b66681d592a"},"schema_version":"1.0","source":{"id":"2607.27242","kind":"arxiv","version":1}},"canonical_sha256":"09c2f6e5e5dd0f6d386b28df614e4a1327435d737b4e938a32ae3178fbdee39c","receipt":{"builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"09c2f6e5e5dd0f6d386b28df614e4a1327435d737b4e938a32ae3178fbdee39c","first_computed_at":"2026-07-31T00:10:24.021203Z","kind":"pith_receipt","last_reissued_at":"2026-07-31T00:10:24.021203Z","receipt_version":"0.3","signature_status":"unsigned_v0"},"source_id":"2607.27242","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:07ce6cf41fb4595b465fcd005405918540a80543b7a29d7ebbfaacdad6794b04","sha256:88a5f070f541a3e92354d6fb23fcc104dfb7a7e20ce90b12a5140ca99ef706a4"],"state_sha256":"e5b044bb27cb00a4db0a3dc827c3c9ebfea44568879f2cfde2e089ae35b8abed"}