{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:OJPGAVNYG3PWPFJ27P7SUSOIWD","short_pith_number":"pith:OJPGAVNY","canonical_record":{"source":{"id":"0812.0458","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-12-02T10:00:33Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"716353a4c0c9efa40160dfcd3cc30f67ffd02a8ec6195459888139cdf7c19020","abstract_canon_sha256":"eee242659dfe0d8684a79a41fff77dc66bfc32f8bfb756e54c3469c6ed91f333"},"schema_version":"1.0"},"canonical_sha256":"725e6055b836df67953afbff2a49c8b0d7f78a4d2bb86ee72db0f8d9b571597a","source":{"kind":"arxiv","id":"0812.0458","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.0458","created_at":"2026-05-18T02:15:12Z"},{"alias_kind":"arxiv_version","alias_value":"0812.0458v2","created_at":"2026-05-18T02:15:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.0458","created_at":"2026-05-18T02:15:12Z"},{"alias_kind":"pith_short_12","alias_value":"OJPGAVNYG3PW","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"OJPGAVNYG3PWPFJ2","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"OJPGAVNY","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:OJPGAVNYG3PWPFJ27P7SUSOIWD","target":"record","payload":{"canonical_record":{"source":{"id":"0812.0458","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-12-02T10:00:33Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"716353a4c0c9efa40160dfcd3cc30f67ffd02a8ec6195459888139cdf7c19020","abstract_canon_sha256":"eee242659dfe0d8684a79a41fff77dc66bfc32f8bfb756e54c3469c6ed91f333"},"schema_version":"1.0"},"canonical_sha256":"725e6055b836df67953afbff2a49c8b0d7f78a4d2bb86ee72db0f8d9b571597a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:12.250520Z","signature_b64":"gTRwLCErRqd+/tpy95iyTGxmCniDpu5Sr09NFZN2Gv470JsjBXSrgfiu+LGxCYDCWLlnK1qRlc5qBtX8k3NIBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"725e6055b836df67953afbff2a49c8b0d7f78a4d2bb86ee72db0f8d9b571597a","last_reissued_at":"2026-05-18T02:15:12.249837Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:12.249837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0812.0458","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:15:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g7K9NqBxTn2qCfjpALYnhBB+9rSPlzOGX3Mw41FgKv6VyuTkaRFOXokIJCc0QujT8vCy/0GRha5jXKgTU9aICA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:26:39.269869Z"},"content_sha256":"ff13d3a821fd69296c96f05032041c99a3b016c524cc5acf940d988cde553d43","schema_version":"1.0","event_id":"sha256:ff13d3a821fd69296c96f05032041c99a3b016c524cc5acf940d988cde553d43"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:OJPGAVNYG3PWPFJ27P7SUSOIWD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multiple Quantum Oscillations in the de Haas van Alphen Spectra of the Underdoped High Temperature Superconductor YBa_2Cu_3O_6.5","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Alain Audouard, Cyril Jaudet, Cyril Proust, D.A. Bonn, David Vignolles, Louis Taillefer, Ruixing Liang, W.N. Hardy","submitted_at":"2008-12-02T10:00:33Z","abstract_excerpt":"By improving the experimental conditions and extensive data accumulation, we have achieved very high-precision in the measurements of the de Haas-van Alphen effect in the underdoped high-temperature superconductor YBa$_{2}$Cu$_{3}$O$_{6.5}$. We find that the main oscillation, so far believed to be single-frequency, is composed of three closely spaced frequencies. We attribute this to bilayer splitting and warping of a single quasi-2D Fermi surface, indicating that \\emph{c}-axis coherence is restored at low temperature in underdoped cuprates. Our results do not support the existence of a larger"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.0458","kind":"arxiv","version":2},"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":"2026-05-18T02:15:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2pNl9opD3IOO9zJFP9DjBjUO2DbXbIbWRmCSBwpAwIPQAo4lDeJIMUq/akaLesX19wUGL13EN5N3e87cTpZACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:26:39.270521Z"},"content_sha256":"fceb95d437ef732c446b802b02ff9d14d874f2a5bf027b2d511020a7fa5ca207","schema_version":"1.0","event_id":"sha256:fceb95d437ef732c446b802b02ff9d14d874f2a5bf027b2d511020a7fa5ca207"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OJPGAVNYG3PWPFJ27P7SUSOIWD/bundle.json","state_url":"https://pith.science/pith/OJPGAVNYG3PWPFJ27P7SUSOIWD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OJPGAVNYG3PWPFJ27P7SUSOIWD/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":"2026-05-25T15:26:39Z","links":{"resolver":"https://pith.science/pith/OJPGAVNYG3PWPFJ27P7SUSOIWD","bundle":"https://pith.science/pith/OJPGAVNYG3PWPFJ27P7SUSOIWD/bundle.json","state":"https://pith.science/pith/OJPGAVNYG3PWPFJ27P7SUSOIWD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OJPGAVNYG3PWPFJ27P7SUSOIWD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:OJPGAVNYG3PWPFJ27P7SUSOIWD","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":"eee242659dfe0d8684a79a41fff77dc66bfc32f8bfb756e54c3469c6ed91f333","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-12-02T10:00:33Z","title_canon_sha256":"716353a4c0c9efa40160dfcd3cc30f67ffd02a8ec6195459888139cdf7c19020"},"schema_version":"1.0","source":{"id":"0812.0458","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.0458","created_at":"2026-05-18T02:15:12Z"},{"alias_kind":"arxiv_version","alias_value":"0812.0458v2","created_at":"2026-05-18T02:15:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.0458","created_at":"2026-05-18T02:15:12Z"},{"alias_kind":"pith_short_12","alias_value":"OJPGAVNYG3PW","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"OJPGAVNYG3PWPFJ2","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"OJPGAVNY","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:fceb95d437ef732c446b802b02ff9d14d874f2a5bf027b2d511020a7fa5ca207","target":"graph","created_at":"2026-05-18T02:15:12Z","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":"By improving the experimental conditions and extensive data accumulation, we have achieved very high-precision in the measurements of the de Haas-van Alphen effect in the underdoped high-temperature superconductor YBa$_{2}$Cu$_{3}$O$_{6.5}$. We find that the main oscillation, so far believed to be single-frequency, is composed of three closely spaced frequencies. We attribute this to bilayer splitting and warping of a single quasi-2D Fermi surface, indicating that \\emph{c}-axis coherence is restored at low temperature in underdoped cuprates. Our results do not support the existence of a larger","authors_text":"Alain Audouard, Cyril Jaudet, Cyril Proust, D.A. Bonn, David Vignolles, Louis Taillefer, Ruixing Liang, W.N. Hardy","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-12-02T10:00:33Z","title":"Multiple Quantum Oscillations in the de Haas van Alphen Spectra of the Underdoped High Temperature Superconductor YBa_2Cu_3O_6.5"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.0458","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:ff13d3a821fd69296c96f05032041c99a3b016c524cc5acf940d988cde553d43","target":"record","created_at":"2026-05-18T02:15:12Z","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":"eee242659dfe0d8684a79a41fff77dc66bfc32f8bfb756e54c3469c6ed91f333","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-12-02T10:00:33Z","title_canon_sha256":"716353a4c0c9efa40160dfcd3cc30f67ffd02a8ec6195459888139cdf7c19020"},"schema_version":"1.0","source":{"id":"0812.0458","kind":"arxiv","version":2}},"canonical_sha256":"725e6055b836df67953afbff2a49c8b0d7f78a4d2bb86ee72db0f8d9b571597a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"725e6055b836df67953afbff2a49c8b0d7f78a4d2bb86ee72db0f8d9b571597a","first_computed_at":"2026-05-18T02:15:12.249837Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:12.249837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gTRwLCErRqd+/tpy95iyTGxmCniDpu5Sr09NFZN2Gv470JsjBXSrgfiu+LGxCYDCWLlnK1qRlc5qBtX8k3NIBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:12.250520Z","signed_message":"canonical_sha256_bytes"},"source_id":"0812.0458","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ff13d3a821fd69296c96f05032041c99a3b016c524cc5acf940d988cde553d43","sha256:fceb95d437ef732c446b802b02ff9d14d874f2a5bf027b2d511020a7fa5ca207"],"state_sha256":"71bd4b3b368f79d986fe4c97d751d0a70cf901b254ce86de28f9a5ae71b29afa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"enLWC1hgFRFeANyzTVULUPBqOsJ6a7+uzZsTsPtl7IllSUZEw79IJ/oPMlFon+5BI/zK5GPeskz9tgpO+jczAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T15:26:39.274295Z","bundle_sha256":"2b5170c31c50d9dbc7f75e7e654fa4cb3c494bdbaba48506f46f1bf543f0c56b"}}