{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:D7DMRSQZSYQV6OG27RBOCDD4PR","short_pith_number":"pith:D7DMRSQZ","canonical_record":{"source":{"id":"1805.01039","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-02T21:51:35Z","cross_cats_sorted":[],"title_canon_sha256":"24012f9deeb2ad1271de93f206f216a3fa1b8f63789ef319e769d4af47c43836","abstract_canon_sha256":"894041af0dbe476c2f30463998c03bb9b6aeb046fab359395c0975dbe27b5a9a"},"schema_version":"1.0"},"canonical_sha256":"1fc6c8ca1996215f38dafc42e10c7c7c71898db98cb6d78cf6f67ecaccd55af0","source":{"kind":"arxiv","id":"1805.01039","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01039","created_at":"2026-05-17T23:58:04Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01039v5","created_at":"2026-05-17T23:58:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01039","created_at":"2026-05-17T23:58:04Z"},{"alias_kind":"pith_short_12","alias_value":"D7DMRSQZSYQV","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"D7DMRSQZSYQV6OG2","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"D7DMRSQZ","created_at":"2026-05-18T12:32:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:D7DMRSQZSYQV6OG27RBOCDD4PR","target":"record","payload":{"canonical_record":{"source":{"id":"1805.01039","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-02T21:51:35Z","cross_cats_sorted":[],"title_canon_sha256":"24012f9deeb2ad1271de93f206f216a3fa1b8f63789ef319e769d4af47c43836","abstract_canon_sha256":"894041af0dbe476c2f30463998c03bb9b6aeb046fab359395c0975dbe27b5a9a"},"schema_version":"1.0"},"canonical_sha256":"1fc6c8ca1996215f38dafc42e10c7c7c71898db98cb6d78cf6f67ecaccd55af0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:58:04.901726Z","signature_b64":"iM9X+QSzmcSTMhrJ2z1FMIJwHK8/A9ua0JfRlWIobxk5l4iLr11q8l3h8DgLo+17UW/xJ852X8vjksZw5uKuDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1fc6c8ca1996215f38dafc42e10c7c7c71898db98cb6d78cf6f67ecaccd55af0","last_reissued_at":"2026-05-17T23:58:04.901239Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:58:04.901239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.01039","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:58:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4qVxUiMVK+HgG1oP/xfFOsXbsdiSgEWZqpN3CsRX5iuTyzix7zUzLv9tRyho541k/kDMDyU53Oxi+3Am0IgDAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:26:56.938561Z"},"content_sha256":"b881fdaacb960c337d78624206091e4966ec3052f89726d15028109c0d9ef27b","schema_version":"1.0","event_id":"sha256:b881fdaacb960c337d78624206091e4966ec3052f89726d15028109c0d9ef27b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:D7DMRSQZSYQV6OG27RBOCDD4PR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mean-field theory for superconductivity in twisted bilayer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"R. Ojaj\\\"arvi, T. J. Peltonen, T. T. Heikkil\\\"a","submitted_at":"2018-05-02T21:51:35Z","abstract_excerpt":"Recent experiments show how a bilayer graphene twisted around a certain magic angle becomes superconducting as it is doped into a region with approximate flat bands. We investigate the mean-field $s$-wave superconducting state in such a system and show how the state evolves as the twist angle is tuned, and as a function of the doping level. We argue that part of the experimental findings could well be understood to result from an attractive electron--electron interaction mediated by electron--phonon coupling, but the flat-band nature of the excitation spectrum makes also superconductivity quit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01039","kind":"arxiv","version":5},"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":"2026-05-17T23:58:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bgF7NrDOnlrMLawVL1ZA/HASf3i+vOGKTjJd86fiir9SxY+qCWgzJFqneFxsM7rinFjn19XWNOQ2NzdJCB9xCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:26:56.938930Z"},"content_sha256":"21b1b548291c116452ce0b181c435c89b1f99cb7f69ceacd06521ecfb90585ab","schema_version":"1.0","event_id":"sha256:21b1b548291c116452ce0b181c435c89b1f99cb7f69ceacd06521ecfb90585ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D7DMRSQZSYQV6OG27RBOCDD4PR/bundle.json","state_url":"https://pith.science/pith/D7DMRSQZSYQV6OG27RBOCDD4PR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D7DMRSQZSYQV6OG27RBOCDD4PR/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":"2026-06-02T20:26:56Z","links":{"resolver":"https://pith.science/pith/D7DMRSQZSYQV6OG27RBOCDD4PR","bundle":"https://pith.science/pith/D7DMRSQZSYQV6OG27RBOCDD4PR/bundle.json","state":"https://pith.science/pith/D7DMRSQZSYQV6OG27RBOCDD4PR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D7DMRSQZSYQV6OG27RBOCDD4PR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:D7DMRSQZSYQV6OG27RBOCDD4PR","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":"894041af0dbe476c2f30463998c03bb9b6aeb046fab359395c0975dbe27b5a9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-02T21:51:35Z","title_canon_sha256":"24012f9deeb2ad1271de93f206f216a3fa1b8f63789ef319e769d4af47c43836"},"schema_version":"1.0","source":{"id":"1805.01039","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01039","created_at":"2026-05-17T23:58:04Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01039v5","created_at":"2026-05-17T23:58:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01039","created_at":"2026-05-17T23:58:04Z"},{"alias_kind":"pith_short_12","alias_value":"D7DMRSQZSYQV","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"D7DMRSQZSYQV6OG2","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"D7DMRSQZ","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:21b1b548291c116452ce0b181c435c89b1f99cb7f69ceacd06521ecfb90585ab","target":"graph","created_at":"2026-05-17T23:58:04Z","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":"Recent experiments show how a bilayer graphene twisted around a certain magic angle becomes superconducting as it is doped into a region with approximate flat bands. We investigate the mean-field $s$-wave superconducting state in such a system and show how the state evolves as the twist angle is tuned, and as a function of the doping level. We argue that part of the experimental findings could well be understood to result from an attractive electron--electron interaction mediated by electron--phonon coupling, but the flat-band nature of the excitation spectrum makes also superconductivity quit","authors_text":"R. Ojaj\\\"arvi, T. J. Peltonen, T. T. Heikkil\\\"a","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-02T21:51:35Z","title":"Mean-field theory for superconductivity in twisted bilayer graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01039","kind":"arxiv","version":5},"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:b881fdaacb960c337d78624206091e4966ec3052f89726d15028109c0d9ef27b","target":"record","created_at":"2026-05-17T23:58:04Z","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":"894041af0dbe476c2f30463998c03bb9b6aeb046fab359395c0975dbe27b5a9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-05-02T21:51:35Z","title_canon_sha256":"24012f9deeb2ad1271de93f206f216a3fa1b8f63789ef319e769d4af47c43836"},"schema_version":"1.0","source":{"id":"1805.01039","kind":"arxiv","version":5}},"canonical_sha256":"1fc6c8ca1996215f38dafc42e10c7c7c71898db98cb6d78cf6f67ecaccd55af0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1fc6c8ca1996215f38dafc42e10c7c7c71898db98cb6d78cf6f67ecaccd55af0","first_computed_at":"2026-05-17T23:58:04.901239Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:04.901239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iM9X+QSzmcSTMhrJ2z1FMIJwHK8/A9ua0JfRlWIobxk5l4iLr11q8l3h8DgLo+17UW/xJ852X8vjksZw5uKuDg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:04.901726Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.01039","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b881fdaacb960c337d78624206091e4966ec3052f89726d15028109c0d9ef27b","sha256:21b1b548291c116452ce0b181c435c89b1f99cb7f69ceacd06521ecfb90585ab"],"state_sha256":"ba99f04fe8d16bbf2275412dcff4689cfa7a1f8eb11e17a23537447890e96c3e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TwbclwRkcGW5GI5vHjn1kEoQK6E5qnV08jWkByUeMYAvfWJWNGJkcLIHKem8PNsHyd4+0i9Z7c4bnwP2d1OcCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T20:26:56.941011Z","bundle_sha256":"767767d528876ba0f88732cdab302cb9ede3d0a2978f7569e2a742c773ba688d"}}