{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:OHBER7V5OC3CYENZQCMTG5ZOVO","short_pith_number":"pith:OHBER7V5","canonical_record":{"source":{"id":"1506.08751","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-29T17:46:30Z","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"title_canon_sha256":"ef1857e5e6571333cf18127877e28b3562512465c7603be5f3d35db90fa8425d","abstract_canon_sha256":"fef67890d08f2134166f14d59a377b1fd65104391c2219f06b5a7e0b0d42d69e"},"schema_version":"1.0"},"canonical_sha256":"71c248febd70b62c11b9809933772eab8d1275be055dadbb7be15eb2b89e2497","source":{"kind":"arxiv","id":"1506.08751","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.08751","created_at":"2026-05-18T01:37:43Z"},{"alias_kind":"arxiv_version","alias_value":"1506.08751v1","created_at":"2026-05-18T01:37:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.08751","created_at":"2026-05-18T01:37:43Z"},{"alias_kind":"pith_short_12","alias_value":"OHBER7V5OC3C","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OHBER7V5OC3CYENZ","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OHBER7V5","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:OHBER7V5OC3CYENZQCMTG5ZOVO","target":"record","payload":{"canonical_record":{"source":{"id":"1506.08751","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-29T17:46:30Z","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"title_canon_sha256":"ef1857e5e6571333cf18127877e28b3562512465c7603be5f3d35db90fa8425d","abstract_canon_sha256":"fef67890d08f2134166f14d59a377b1fd65104391c2219f06b5a7e0b0d42d69e"},"schema_version":"1.0"},"canonical_sha256":"71c248febd70b62c11b9809933772eab8d1275be055dadbb7be15eb2b89e2497","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:43.511092Z","signature_b64":"UJdF01iJSzYu7LoBKmMUhlQJgUse2cktWOWmE5kMTvIJ2ONWiFPL+lpp4gITCDhB6NQfrUeQ/1152BXrc1gWBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"71c248febd70b62c11b9809933772eab8d1275be055dadbb7be15eb2b89e2497","last_reissued_at":"2026-05-18T01:37:43.510539Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:43.510539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.08751","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":"2026-05-18T01:37:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hTTNipea0hhTLHQBkdIHCW8C8KHeGhvX3Ub2qR7nmtjt8KSKHXqho++lmjzL5MNJvb9xWUtBFtsTI5/74KIwAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:38:58.342345Z"},"content_sha256":"91acf946fce2f6797cd9bfdaa1897eea0847e021e90266ca63b8c013159b3421","schema_version":"1.0","event_id":"sha256:91acf946fce2f6797cd9bfdaa1897eea0847e021e90266ca63b8c013159b3421"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:OHBER7V5OC3CYENZQCMTG5ZOVO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comparison of pressurized sulfur hydride with conventional superconductors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"E.J. Nicol, J.P. Carbotte","submitted_at":"2015-06-29T17:46:30Z","abstract_excerpt":"A recent report that sulfur hydride under pressure is an electron-phonon superconductor with a Tc of 190 K has been met with much excitement although it is yet to be confirmed. Based on several electron-phonon spectral density functions already available from density functional theory, we find that the electron-phonon spectrum is near optimum for Tc with a particularly large value of its characteristic phonon energy omega_ln which is due to the small hydrogen mass. We find that the thermodynamic universal BCS ratios are near those for Pb and Nb3Sn. We suggest that optical measurements could be"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.08751","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":"2026-05-18T01:37:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"edRYdZUaSuj41Yhh8/yvWTIGOulA2fcjYdJQk2pRPqd96pZ5OTdnqFxPH40AH1QwyQ/zAll4Sa90Xc4LtNEJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:38:58.343012Z"},"content_sha256":"6a3d7f449ef15ca5ad4f4bcdd51f7f0a9ce8264ae35e78985202e4284699c871","schema_version":"1.0","event_id":"sha256:6a3d7f449ef15ca5ad4f4bcdd51f7f0a9ce8264ae35e78985202e4284699c871"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OHBER7V5OC3CYENZQCMTG5ZOVO/bundle.json","state_url":"https://pith.science/pith/OHBER7V5OC3CYENZQCMTG5ZOVO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OHBER7V5OC3CYENZQCMTG5ZOVO/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":"2026-05-27T03:38:58Z","links":{"resolver":"https://pith.science/pith/OHBER7V5OC3CYENZQCMTG5ZOVO","bundle":"https://pith.science/pith/OHBER7V5OC3CYENZQCMTG5ZOVO/bundle.json","state":"https://pith.science/pith/OHBER7V5OC3CYENZQCMTG5ZOVO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OHBER7V5OC3CYENZQCMTG5ZOVO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:OHBER7V5OC3CYENZQCMTG5ZOVO","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":"fef67890d08f2134166f14d59a377b1fd65104391c2219f06b5a7e0b0d42d69e","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-29T17:46:30Z","title_canon_sha256":"ef1857e5e6571333cf18127877e28b3562512465c7603be5f3d35db90fa8425d"},"schema_version":"1.0","source":{"id":"1506.08751","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.08751","created_at":"2026-05-18T01:37:43Z"},{"alias_kind":"arxiv_version","alias_value":"1506.08751v1","created_at":"2026-05-18T01:37:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.08751","created_at":"2026-05-18T01:37:43Z"},{"alias_kind":"pith_short_12","alias_value":"OHBER7V5OC3C","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OHBER7V5OC3CYENZ","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OHBER7V5","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:6a3d7f449ef15ca5ad4f4bcdd51f7f0a9ce8264ae35e78985202e4284699c871","target":"graph","created_at":"2026-05-18T01:37:43Z","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":"A recent report that sulfur hydride under pressure is an electron-phonon superconductor with a Tc of 190 K has been met with much excitement although it is yet to be confirmed. Based on several electron-phonon spectral density functions already available from density functional theory, we find that the electron-phonon spectrum is near optimum for Tc with a particularly large value of its characteristic phonon energy omega_ln which is due to the small hydrogen mass. We find that the thermodynamic universal BCS ratios are near those for Pb and Nb3Sn. We suggest that optical measurements could be","authors_text":"E.J. Nicol, J.P. Carbotte","cross_cats":["cond-mat.mtrl-sci","cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-29T17:46:30Z","title":"Comparison of pressurized sulfur hydride with conventional superconductors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.08751","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":"sha256:91acf946fce2f6797cd9bfdaa1897eea0847e021e90266ca63b8c013159b3421","target":"record","created_at":"2026-05-18T01:37:43Z","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":"fef67890d08f2134166f14d59a377b1fd65104391c2219f06b5a7e0b0d42d69e","cross_cats_sorted":["cond-mat.mtrl-sci","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-06-29T17:46:30Z","title_canon_sha256":"ef1857e5e6571333cf18127877e28b3562512465c7603be5f3d35db90fa8425d"},"schema_version":"1.0","source":{"id":"1506.08751","kind":"arxiv","version":1}},"canonical_sha256":"71c248febd70b62c11b9809933772eab8d1275be055dadbb7be15eb2b89e2497","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"71c248febd70b62c11b9809933772eab8d1275be055dadbb7be15eb2b89e2497","first_computed_at":"2026-05-18T01:37:43.510539Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:43.510539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UJdF01iJSzYu7LoBKmMUhlQJgUse2cktWOWmE5kMTvIJ2ONWiFPL+lpp4gITCDhB6NQfrUeQ/1152BXrc1gWBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:43.511092Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.08751","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:91acf946fce2f6797cd9bfdaa1897eea0847e021e90266ca63b8c013159b3421","sha256:6a3d7f449ef15ca5ad4f4bcdd51f7f0a9ce8264ae35e78985202e4284699c871"],"state_sha256":"b46007eb4369f3e8d33e0b200da8db5ec168b5ba3429c8e6851851dfa34ee54d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zLAEN3ceJ2vYtWsg37EoDY03JRQju6X52hU1tZULhFnqvD/nq32YXMDv+dtLe1q2+tK3z5NDWz2JbCeQMOAzAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T03:38:58.346887Z","bundle_sha256":"0d93d0df14635ad48ce94dcb156b42288654abb72f3b4f6d4a11f246fc0229b7"}}