{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:C7BXV63PLWU3X2GAQQNBJQMHBK","short_pith_number":"pith:C7BXV63P","canonical_record":{"source":{"id":"1802.09329","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-02-26T14:42:30Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"7289b05b0ddf448bf3b5506abf7ef8090924ca8609063547fc9171cccc167d07","abstract_canon_sha256":"01241c7ef8e9f86059bd6a116394228e3c9592af191d3302d7d6e5a70bc1f6c6"},"schema_version":"1.0"},"canonical_sha256":"17c37afb6f5da9bbe8c0841a14c1870a9ac37fff04adf829477dc1f99c6f5a88","source":{"kind":"arxiv","id":"1802.09329","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.09329","created_at":"2026-05-17T23:57:59Z"},{"alias_kind":"arxiv_version","alias_value":"1802.09329v1","created_at":"2026-05-17T23:57:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.09329","created_at":"2026-05-17T23:57:59Z"},{"alias_kind":"pith_short_12","alias_value":"C7BXV63PLWU3","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"C7BXV63PLWU3X2GA","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"C7BXV63P","created_at":"2026-05-18T12:32:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:C7BXV63PLWU3X2GAQQNBJQMHBK","target":"record","payload":{"canonical_record":{"source":{"id":"1802.09329","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-02-26T14:42:30Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"7289b05b0ddf448bf3b5506abf7ef8090924ca8609063547fc9171cccc167d07","abstract_canon_sha256":"01241c7ef8e9f86059bd6a116394228e3c9592af191d3302d7d6e5a70bc1f6c6"},"schema_version":"1.0"},"canonical_sha256":"17c37afb6f5da9bbe8c0841a14c1870a9ac37fff04adf829477dc1f99c6f5a88","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:59.543692Z","signature_b64":"CsdUDREGPNsrt5EAC3nnpuV0VOhdodFtjfclKyv/MjS3plfTEWxsZkM1WiV0YL+LJWByk07JEIwm+CVwlZ3aDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"17c37afb6f5da9bbe8c0841a14c1870a9ac37fff04adf829477dc1f99c6f5a88","last_reissued_at":"2026-05-17T23:57:59.543053Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:59.543053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.09329","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":"2026-05-17T23:57:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Edy1Y2No+8XhOuNsG8Ba/fCpeLgeLUSo2jsqBlEqzYXKE33GAtl6yXJbXi5g4y/PXn3o0te85FZvhq0oj2oCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:41:08.996854Z"},"content_sha256":"f5465fc006dc020609cc236c404db056851f7586709014eb3fc9a054604a0cc2","schema_version":"1.0","event_id":"sha256:f5465fc006dc020609cc236c404db056851f7586709014eb3fc9a054604a0cc2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:C7BXV63PLWU3X2GAQQNBJQMHBK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct observation of multi-spinon excitations outside of the two-spinon continuum in the antiferromagnetic spin chain cuprate Sr2CuO3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.str-el","authors_text":"A. Revcolevschi, H. M. R{\\o}nnow, J. Schlappa, K. J. Zhou, L. Patthey, M. Mourigal, S. Johnston, S. Singh, T. Schmitt, U. Kumar, V. N. Strocov","submitted_at":"2018-02-26T14:42:30Z","abstract_excerpt":"One-dimensional (1D) magnetic insulators have attracted significant interest as a platform for studying emergent phenomena such as quasiparticle fractionalization and quantum criticality. The antiferromagnetic Heisenberg chain of spins-1/2 is an important reference system; its elementary excitations are spin-1/2 quasiparticles called spinons that are always created in pairs. However, while inelastic neutron scattering (INS) experiments routinely observe the excitation continuum associated with two-spinon states, the presence of more complex dynamics associated with four-spinon states has only "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.09329","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":"2026-05-17T23:57:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TaMSfVlIUy7RsLAfV/nxpOii/gwvPZgHEpnD5AT+OzHQhlqgs/kSlMBNZUNVPYjTUgV+w/uIgIivn1jcDXakBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:41:08.997194Z"},"content_sha256":"5db97304157b789789bd487f04967d5d1be66453863ff886e4c28e7e00e6dc6d","schema_version":"1.0","event_id":"sha256:5db97304157b789789bd487f04967d5d1be66453863ff886e4c28e7e00e6dc6d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C7BXV63PLWU3X2GAQQNBJQMHBK/bundle.json","state_url":"https://pith.science/pith/C7BXV63PLWU3X2GAQQNBJQMHBK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C7BXV63PLWU3X2GAQQNBJQMHBK/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":"2026-05-30T14:41:08Z","links":{"resolver":"https://pith.science/pith/C7BXV63PLWU3X2GAQQNBJQMHBK","bundle":"https://pith.science/pith/C7BXV63PLWU3X2GAQQNBJQMHBK/bundle.json","state":"https://pith.science/pith/C7BXV63PLWU3X2GAQQNBJQMHBK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C7BXV63PLWU3X2GAQQNBJQMHBK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:C7BXV63PLWU3X2GAQQNBJQMHBK","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":"01241c7ef8e9f86059bd6a116394228e3c9592af191d3302d7d6e5a70bc1f6c6","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-02-26T14:42:30Z","title_canon_sha256":"7289b05b0ddf448bf3b5506abf7ef8090924ca8609063547fc9171cccc167d07"},"schema_version":"1.0","source":{"id":"1802.09329","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.09329","created_at":"2026-05-17T23:57:59Z"},{"alias_kind":"arxiv_version","alias_value":"1802.09329v1","created_at":"2026-05-17T23:57:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.09329","created_at":"2026-05-17T23:57:59Z"},{"alias_kind":"pith_short_12","alias_value":"C7BXV63PLWU3","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"C7BXV63PLWU3X2GA","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"C7BXV63P","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:5db97304157b789789bd487f04967d5d1be66453863ff886e4c28e7e00e6dc6d","target":"graph","created_at":"2026-05-17T23:57:59Z","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":"One-dimensional (1D) magnetic insulators have attracted significant interest as a platform for studying emergent phenomena such as quasiparticle fractionalization and quantum criticality. The antiferromagnetic Heisenberg chain of spins-1/2 is an important reference system; its elementary excitations are spin-1/2 quasiparticles called spinons that are always created in pairs. However, while inelastic neutron scattering (INS) experiments routinely observe the excitation continuum associated with two-spinon states, the presence of more complex dynamics associated with four-spinon states has only ","authors_text":"A. Revcolevschi, H. M. R{\\o}nnow, J. Schlappa, K. J. Zhou, L. Patthey, M. Mourigal, S. Johnston, S. Singh, T. Schmitt, U. Kumar, V. N. Strocov","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-02-26T14:42:30Z","title":"Direct observation of multi-spinon excitations outside of the two-spinon continuum in the antiferromagnetic spin chain cuprate Sr2CuO3"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.09329","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:f5465fc006dc020609cc236c404db056851f7586709014eb3fc9a054604a0cc2","target":"record","created_at":"2026-05-17T23:57:59Z","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":"01241c7ef8e9f86059bd6a116394228e3c9592af191d3302d7d6e5a70bc1f6c6","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-02-26T14:42:30Z","title_canon_sha256":"7289b05b0ddf448bf3b5506abf7ef8090924ca8609063547fc9171cccc167d07"},"schema_version":"1.0","source":{"id":"1802.09329","kind":"arxiv","version":1}},"canonical_sha256":"17c37afb6f5da9bbe8c0841a14c1870a9ac37fff04adf829477dc1f99c6f5a88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17c37afb6f5da9bbe8c0841a14c1870a9ac37fff04adf829477dc1f99c6f5a88","first_computed_at":"2026-05-17T23:57:59.543053Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:59.543053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CsdUDREGPNsrt5EAC3nnpuV0VOhdodFtjfclKyv/MjS3plfTEWxsZkM1WiV0YL+LJWByk07JEIwm+CVwlZ3aDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:59.543692Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.09329","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f5465fc006dc020609cc236c404db056851f7586709014eb3fc9a054604a0cc2","sha256:5db97304157b789789bd487f04967d5d1be66453863ff886e4c28e7e00e6dc6d"],"state_sha256":"c251a46ba63e1ec269775a90666147900c7ddc37fa26832f6bebead6badd86a2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"owb5D+6+ojRz7lJzOlDFNdQ+uH0jvoyPmyylWeT1wJk2CVDc44aSfjk1JTVtl87StNuMZJ3NIAGSQmR8K/DdAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T14:41:08.999297Z","bundle_sha256":"67a42cffb7d512319cb96af8f518f097ad9d00f7026eb76f5252d04f96ec0323"}}