{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:FN5W4RWLCEWO3QHLTWEMLTMVRI","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":"5a265d315c4b82e7a2fc2924b354734f8f44d8ab78258cce26626f1e6c753900","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2024-09-30T08:57:07Z","title_canon_sha256":"f30793bd322b3ace15353a5184d197489418ef1d84f0e984ce5201cae4b45f1f"},"schema_version":"1.0","source":{"id":"2409.20103","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2409.20103","created_at":"2026-07-05T10:06:44Z"},{"alias_kind":"arxiv_version","alias_value":"2409.20103v2","created_at":"2026-07-05T10:06:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2409.20103","created_at":"2026-07-05T10:06:44Z"},{"alias_kind":"pith_short_12","alias_value":"FN5W4RWLCEWO","created_at":"2026-07-05T10:06:44Z"},{"alias_kind":"pith_short_16","alias_value":"FN5W4RWLCEWO3QHL","created_at":"2026-07-05T10:06:44Z"},{"alias_kind":"pith_short_8","alias_value":"FN5W4RWL","created_at":"2026-07-05T10:06:44Z"}],"graph_snapshots":[{"event_id":"sha256:baf02557f0dd3aff2670a7610472f0d82901962375c841c342b32b547db74749","target":"graph","created_at":"2026-07-05T10:06:44Z","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/2409.20103/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on terahertz spectroscopic measurements of quantum spin dynamics on single crystals of a spin-1/2 frustrated spin-ladder antiferromagnet BiCu$_2$PO$_6$ as a function of temperature, polarization, and applied external magnetic fields. Spin triplon excitations are observed at zero field and split in applied magnetic fields. For magnetic fields applied along the crystallographic $a$ axis, a quantum phase transition at $B_{c1}=21.4 \\mathrm{T}$ is featured by a low-energy excitation mode emerging above $B_{c1}$ which indicates a gap reopening. For fields along the $b$ axis and the $c$ axi","authors_text":"Anneke Reinold, Benedikt Fauseweh, Changqing Zhu, Fang-Cheng Chou, Gary Schmiedinghoff, G\\\"otz S. Uhrig, Guo-Jiun Shu, Hans Engelkamp, Kirill Amelin, Kirill Yu. Povarov, Patrick Pilch, Sergei Zvyagin, Toomas R\\~o\\~om, Urmas Nagel, Yin-Ping Lan, Zhe Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2024-09-30T08:57:07Z","title":"Low-energy spin excitations in field-induced phases of the spin-ladder antiferromagnet BiCu$_2$PO$_6$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.20103","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:f9e6424900a4e99ff501157b2ea05357352705ee670901601e226c33dbb8d7a5","target":"record","created_at":"2026-07-05T10:06:44Z","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":"5a265d315c4b82e7a2fc2924b354734f8f44d8ab78258cce26626f1e6c753900","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2024-09-30T08:57:07Z","title_canon_sha256":"f30793bd322b3ace15353a5184d197489418ef1d84f0e984ce5201cae4b45f1f"},"schema_version":"1.0","source":{"id":"2409.20103","kind":"arxiv","version":2}},"canonical_sha256":"2b7b6e46cb112cedc0eb9d88c5cd958a0bd9c10ece42be02d25d59a604c49624","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b7b6e46cb112cedc0eb9d88c5cd958a0bd9c10ece42be02d25d59a604c49624","first_computed_at":"2026-07-05T10:06:44.215972Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:06:44.215972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2MNi08tCAZoE5nwJrrqX/81zLlcq41S0dbW8/3jhPaVMt2k2rmKm/F1kNVSCNzAiXeR1r5kwEbGejhEUUcLPDg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:06:44.216459Z","signed_message":"canonical_sha256_bytes"},"source_id":"2409.20103","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9e6424900a4e99ff501157b2ea05357352705ee670901601e226c33dbb8d7a5","sha256:baf02557f0dd3aff2670a7610472f0d82901962375c841c342b32b547db74749"],"state_sha256":"37dbedaee2bbcc5550f7c360a5eed8d608771ddb7411bfc776f8faec3d022e26"}