{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7AAWMSAHRGTDZ3N6YUCKHSPUGZ","short_pith_number":"pith:7AAWMSAH","canonical_record":{"source":{"id":"1801.08242","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-01-24T23:35:29Z","cross_cats_sorted":[],"title_canon_sha256":"c83f5c89b8ff15e4d3006d375c61e070667d8b300c8f7646c9edeb4a072b31c4","abstract_canon_sha256":"f675d13a4600e921da10a1b9ad4e11d18d0c447d24c9d61132be3e163638036f"},"schema_version":"1.0"},"canonical_sha256":"f80166480789a63cedbec504a3c9f4365da87b9645cf172c1b75ce4c0f158403","source":{"kind":"arxiv","id":"1801.08242","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.08242","created_at":"2026-05-18T00:22:54Z"},{"alias_kind":"arxiv_version","alias_value":"1801.08242v1","created_at":"2026-05-18T00:22:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.08242","created_at":"2026-05-18T00:22:54Z"},{"alias_kind":"pith_short_12","alias_value":"7AAWMSAHRGTD","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7AAWMSAHRGTDZ3N6","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7AAWMSAH","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7AAWMSAHRGTDZ3N6YUCKHSPUGZ","target":"record","payload":{"canonical_record":{"source":{"id":"1801.08242","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-01-24T23:35:29Z","cross_cats_sorted":[],"title_canon_sha256":"c83f5c89b8ff15e4d3006d375c61e070667d8b300c8f7646c9edeb4a072b31c4","abstract_canon_sha256":"f675d13a4600e921da10a1b9ad4e11d18d0c447d24c9d61132be3e163638036f"},"schema_version":"1.0"},"canonical_sha256":"f80166480789a63cedbec504a3c9f4365da87b9645cf172c1b75ce4c0f158403","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:54.729808Z","signature_b64":"hJ3KFoLi1Td3cvH6NsPE6exIXK1INoUMAmBNJd9betcMJua379BAiWZZrsbp51rYpTgCSKrOHeRkgKK7u2PaAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f80166480789a63cedbec504a3c9f4365da87b9645cf172c1b75ce4c0f158403","last_reissued_at":"2026-05-18T00:22:54.729178Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:54.729178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.08242","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":"2026-05-18T00:22:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VLuUddLmnKtW1hMY71u4J6fnepEC4kePvOVoEZMBAi1Ts68pegyI3hKcAvFzRUL6f3uFbX8SYoK6FBcL3NVHBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T10:45:13.326217Z"},"content_sha256":"a5778cad1afa42609afc74469beb6dc325fe0950303c9adadb2a8094a74e3435","schema_version":"1.0","event_id":"sha256:a5778cad1afa42609afc74469beb6dc325fe0950303c9adadb2a8094a74e3435"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7AAWMSAHRGTDZ3N6YUCKHSPUGZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct Observation of the Quantum Phase Transition of SrCu$_{2}$(BO$_{3}$)$_{2}$ by High-Pressure and Terahertz Electron Spin Resonance","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Hitoshi Ohta, Kazutaka Kudo, Keigo Hijii, Susumu Okubo, Takahiro Sakurai, Yoji Koike, Yoshiya Uwatoko, Yuki Hirao","submitted_at":"2018-01-24T23:35:29Z","abstract_excerpt":"High-pressure and high-field electron spin resonance (ESR) measurements have been performed on a single crystal of the orthogonal-dimer spin system SrCu$_{2}$(BO$_{3}$)$_{2}$. With frequencies below 1 THz, ESR signals associated with transitions from the singlet ground state to the one-triplet excited states and the two-triplet bound state were observed at pressures up to 2.1 GPa. We obtained directly the pressure dependence of the gap energies, finding a clear first-order phase transition at $P_{c}=1.85\\pm0.05$ GPa. By comparing this pressure dependence with the calculated excitation energies"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.08242","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":"2026-05-18T00:22:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jE5NT+LGpquaHH55kokQ4wX6Q6kM9aGeFne3k2rShd+z0lbREgqUaJHmgJvtVHYrDSlEMtsD7obIFEz6iimKAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T10:45:13.326581Z"},"content_sha256":"9aec35ada34d68831f916e4f32292466fbb555fa6f37de44deb86472df9f4bb5","schema_version":"1.0","event_id":"sha256:9aec35ada34d68831f916e4f32292466fbb555fa6f37de44deb86472df9f4bb5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7AAWMSAHRGTDZ3N6YUCKHSPUGZ/bundle.json","state_url":"https://pith.science/pith/7AAWMSAHRGTDZ3N6YUCKHSPUGZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7AAWMSAHRGTDZ3N6YUCKHSPUGZ/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":"2026-05-28T10:45:13Z","links":{"resolver":"https://pith.science/pith/7AAWMSAHRGTDZ3N6YUCKHSPUGZ","bundle":"https://pith.science/pith/7AAWMSAHRGTDZ3N6YUCKHSPUGZ/bundle.json","state":"https://pith.science/pith/7AAWMSAHRGTDZ3N6YUCKHSPUGZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7AAWMSAHRGTDZ3N6YUCKHSPUGZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7AAWMSAHRGTDZ3N6YUCKHSPUGZ","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":"f675d13a4600e921da10a1b9ad4e11d18d0c447d24c9d61132be3e163638036f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-01-24T23:35:29Z","title_canon_sha256":"c83f5c89b8ff15e4d3006d375c61e070667d8b300c8f7646c9edeb4a072b31c4"},"schema_version":"1.0","source":{"id":"1801.08242","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.08242","created_at":"2026-05-18T00:22:54Z"},{"alias_kind":"arxiv_version","alias_value":"1801.08242v1","created_at":"2026-05-18T00:22:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.08242","created_at":"2026-05-18T00:22:54Z"},{"alias_kind":"pith_short_12","alias_value":"7AAWMSAHRGTD","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7AAWMSAHRGTDZ3N6","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7AAWMSAH","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:9aec35ada34d68831f916e4f32292466fbb555fa6f37de44deb86472df9f4bb5","target":"graph","created_at":"2026-05-18T00:22:54Z","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":"High-pressure and high-field electron spin resonance (ESR) measurements have been performed on a single crystal of the orthogonal-dimer spin system SrCu$_{2}$(BO$_{3}$)$_{2}$. With frequencies below 1 THz, ESR signals associated with transitions from the singlet ground state to the one-triplet excited states and the two-triplet bound state were observed at pressures up to 2.1 GPa. We obtained directly the pressure dependence of the gap energies, finding a clear first-order phase transition at $P_{c}=1.85\\pm0.05$ GPa. By comparing this pressure dependence with the calculated excitation energies","authors_text":"Hitoshi Ohta, Kazutaka Kudo, Keigo Hijii, Susumu Okubo, Takahiro Sakurai, Yoji Koike, Yoshiya Uwatoko, Yuki Hirao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-01-24T23:35:29Z","title":"Direct Observation of the Quantum Phase Transition of SrCu$_{2}$(BO$_{3}$)$_{2}$ by High-Pressure and Terahertz Electron Spin Resonance"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.08242","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:a5778cad1afa42609afc74469beb6dc325fe0950303c9adadb2a8094a74e3435","target":"record","created_at":"2026-05-18T00:22:54Z","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":"f675d13a4600e921da10a1b9ad4e11d18d0c447d24c9d61132be3e163638036f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-01-24T23:35:29Z","title_canon_sha256":"c83f5c89b8ff15e4d3006d375c61e070667d8b300c8f7646c9edeb4a072b31c4"},"schema_version":"1.0","source":{"id":"1801.08242","kind":"arxiv","version":1}},"canonical_sha256":"f80166480789a63cedbec504a3c9f4365da87b9645cf172c1b75ce4c0f158403","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f80166480789a63cedbec504a3c9f4365da87b9645cf172c1b75ce4c0f158403","first_computed_at":"2026-05-18T00:22:54.729178Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:54.729178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hJ3KFoLi1Td3cvH6NsPE6exIXK1INoUMAmBNJd9betcMJua379BAiWZZrsbp51rYpTgCSKrOHeRkgKK7u2PaAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:54.729808Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.08242","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a5778cad1afa42609afc74469beb6dc325fe0950303c9adadb2a8094a74e3435","sha256:9aec35ada34d68831f916e4f32292466fbb555fa6f37de44deb86472df9f4bb5"],"state_sha256":"a2b43bc6072fcd6c217b093dae18d56e5963299d6af7999bf82413632d2b3333"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u2WiWQeL1LXUxjCHuuw/9DMm5QZHN77QjV4Yi32BKLSv9/vsbY8JMeBaYYBDPPbgz9sc4zbPo+g8oNZZivq2BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T10:45:13.328522Z","bundle_sha256":"7023cc13d212549458ddb1c87a978ea9f9da7c32d3bc5e031b7030b37d5074ce"}}