{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:PORHA2RP7LH5CUDS3LTPLFSJAN","short_pith_number":"pith:PORHA2RP","canonical_record":{"source":{"id":"1301.6769","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-01-28T21:04:20Z","cross_cats_sorted":[],"title_canon_sha256":"900a661c0233eb05de8572baf8714abca53c30d42f61e73e1221ce78da70b118","abstract_canon_sha256":"3d237ea3af568f0e2aaca29a4d0e708eb06254f39dbd57afe09b2c8d03964591"},"schema_version":"1.0"},"canonical_sha256":"7ba2706a2ffacfd15072dae6f59649036bc4d3007a45f57f10fbb726c8afa28f","source":{"kind":"arxiv","id":"1301.6769","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.6769","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"arxiv_version","alias_value":"1301.6769v1","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.6769","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"pith_short_12","alias_value":"PORHA2RP7LH5","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PORHA2RP7LH5CUDS","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PORHA2RP","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:PORHA2RP7LH5CUDS3LTPLFSJAN","target":"record","payload":{"canonical_record":{"source":{"id":"1301.6769","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-01-28T21:04:20Z","cross_cats_sorted":[],"title_canon_sha256":"900a661c0233eb05de8572baf8714abca53c30d42f61e73e1221ce78da70b118","abstract_canon_sha256":"3d237ea3af568f0e2aaca29a4d0e708eb06254f39dbd57afe09b2c8d03964591"},"schema_version":"1.0"},"canonical_sha256":"7ba2706a2ffacfd15072dae6f59649036bc4d3007a45f57f10fbb726c8afa28f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:57.723845Z","signature_b64":"+ayyYJt3kSQP4og4HSxQtYApTbTpT9XN72PtdOFqbxJXaZxLA5sURhxA/td4pe4t5CipOz6iMoJlY8usWBA4Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7ba2706a2ffacfd15072dae6f59649036bc4d3007a45f57f10fbb726c8afa28f","last_reissued_at":"2026-05-18T01:51:57.723347Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:57.723347Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.6769","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:51:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W9GhrHs7HqqdlnhNN856J4TiLL2MBA6T/VtCvRD3GZ/OVvEvsT6aY2cZN2B/7YekKDwR2kXGS32ycRuOlVTdAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:42:46.943333Z"},"content_sha256":"b9967ff5bf41d09d4da727b577f10ec44e14100e43462e4e9c24acff1368e46d","schema_version":"1.0","event_id":"sha256:b9967ff5bf41d09d4da727b577f10ec44e14100e43462e4e9c24acff1368e46d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:PORHA2RP7LH5CUDS3LTPLFSJAN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evidence for Dimer Crystal Melting in the Frustrated Spin-Ladder BiCu2PO6","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"D. Wulferding, F. C. Chou, G. J. Shu, J. W. Hwang, K.-Y. Choi, P. Lemmens","submitted_at":"2013-01-28T21:04:20Z","abstract_excerpt":"In the spin ladder compound BiCu$_2$PO$_6$ there exists a decisive dynamics of spin excitations that we classify and characterize using inelastic light scattering. We observe low-energy singlets and a broad triplon continuum extending from 36 cm$^{-1}$ to 700 cm$^{-1}$ in ($aa$), ($bb$), and ($cc$) light scattering polarizations. Though isolated spin ladder physics can roughly account for the observed excitations at high energies, frustration and interladder interactions need to be considered to fully describe the spectral distribution and scattering selection rules at low and intermediate ene"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.6769","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:51:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1D/5p/OtHUBsca0YAHw1H3coUGzsM2G/3r7ang41bFbL71iMH6m9RIW2lslsVVDgsVEji0KE/IHt1s8+6BFfDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:42:46.944227Z"},"content_sha256":"a51abce6e9cedab8f6775f372ebf2910fc628d15255a1deb6925912cfc23f103","schema_version":"1.0","event_id":"sha256:a51abce6e9cedab8f6775f372ebf2910fc628d15255a1deb6925912cfc23f103"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PORHA2RP7LH5CUDS3LTPLFSJAN/bundle.json","state_url":"https://pith.science/pith/PORHA2RP7LH5CUDS3LTPLFSJAN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PORHA2RP7LH5CUDS3LTPLFSJAN/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-31T00:42:46Z","links":{"resolver":"https://pith.science/pith/PORHA2RP7LH5CUDS3LTPLFSJAN","bundle":"https://pith.science/pith/PORHA2RP7LH5CUDS3LTPLFSJAN/bundle.json","state":"https://pith.science/pith/PORHA2RP7LH5CUDS3LTPLFSJAN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PORHA2RP7LH5CUDS3LTPLFSJAN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:PORHA2RP7LH5CUDS3LTPLFSJAN","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":"3d237ea3af568f0e2aaca29a4d0e708eb06254f39dbd57afe09b2c8d03964591","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-01-28T21:04:20Z","title_canon_sha256":"900a661c0233eb05de8572baf8714abca53c30d42f61e73e1221ce78da70b118"},"schema_version":"1.0","source":{"id":"1301.6769","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.6769","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"arxiv_version","alias_value":"1301.6769v1","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.6769","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"pith_short_12","alias_value":"PORHA2RP7LH5","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PORHA2RP7LH5CUDS","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PORHA2RP","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:a51abce6e9cedab8f6775f372ebf2910fc628d15255a1deb6925912cfc23f103","target":"graph","created_at":"2026-05-18T01:51:57Z","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":"In the spin ladder compound BiCu$_2$PO$_6$ there exists a decisive dynamics of spin excitations that we classify and characterize using inelastic light scattering. We observe low-energy singlets and a broad triplon continuum extending from 36 cm$^{-1}$ to 700 cm$^{-1}$ in ($aa$), ($bb$), and ($cc$) light scattering polarizations. Though isolated spin ladder physics can roughly account for the observed excitations at high energies, frustration and interladder interactions need to be considered to fully describe the spectral distribution and scattering selection rules at low and intermediate ene","authors_text":"D. Wulferding, F. C. Chou, G. J. Shu, J. W. Hwang, K.-Y. Choi, P. Lemmens","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-01-28T21:04:20Z","title":"Evidence for Dimer Crystal Melting in the Frustrated Spin-Ladder BiCu2PO6"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.6769","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:b9967ff5bf41d09d4da727b577f10ec44e14100e43462e4e9c24acff1368e46d","target":"record","created_at":"2026-05-18T01:51:57Z","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":"3d237ea3af568f0e2aaca29a4d0e708eb06254f39dbd57afe09b2c8d03964591","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-01-28T21:04:20Z","title_canon_sha256":"900a661c0233eb05de8572baf8714abca53c30d42f61e73e1221ce78da70b118"},"schema_version":"1.0","source":{"id":"1301.6769","kind":"arxiv","version":1}},"canonical_sha256":"7ba2706a2ffacfd15072dae6f59649036bc4d3007a45f57f10fbb726c8afa28f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ba2706a2ffacfd15072dae6f59649036bc4d3007a45f57f10fbb726c8afa28f","first_computed_at":"2026-05-18T01:51:57.723347Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:57.723347Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+ayyYJt3kSQP4og4HSxQtYApTbTpT9XN72PtdOFqbxJXaZxLA5sURhxA/td4pe4t5CipOz6iMoJlY8usWBA4Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:57.723845Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.6769","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b9967ff5bf41d09d4da727b577f10ec44e14100e43462e4e9c24acff1368e46d","sha256:a51abce6e9cedab8f6775f372ebf2910fc628d15255a1deb6925912cfc23f103"],"state_sha256":"93178af5b4bcdad442c78011e15910fcbac511b3980a660539aa4525e4fbbd1f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YvudFP5b8JWEi0xDV86blNS+iwXhQkoDNHiPTZ3XsShib6MOQ+N6W3fYAS8meNGydJV6zVOFkd1ICzJTtTpvDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T00:42:46.949383Z","bundle_sha256":"147661b0a1059d6be8348b5b9536e8ffa7a4735e2455cbdb45b97886c0d9f10a"}}