{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:BMHE6BWZEFAFSBUN72SSPG4HZP","short_pith_number":"pith:BMHE6BWZ","canonical_record":{"source":{"id":"cond-mat/0109129","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-09-06T20:00:20Z","cross_cats_sorted":[],"title_canon_sha256":"dd6ab62f20ba9aaa061b273c56f3e43d9bacaba4e256dd9af17ddb4d69a94adf","abstract_canon_sha256":"87f7c1ee231fa894f75c88128dfc7f2ae53fb42eaef2982dfd57f192493e293c"},"schema_version":"1.0"},"canonical_sha256":"0b0e4f06d9214059068dfea5279b87cbf1d6c755fd8dffb38babcd4e489c5370","source":{"kind":"arxiv","id":"cond-mat/0109129","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0109129","created_at":"2026-05-18T01:07:02Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0109129v1","created_at":"2026-05-18T01:07:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0109129","created_at":"2026-05-18T01:07:02Z"},{"alias_kind":"pith_short_12","alias_value":"BMHE6BWZEFAF","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"BMHE6BWZEFAFSBUN","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"BMHE6BWZ","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:BMHE6BWZEFAFSBUN72SSPG4HZP","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0109129","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-09-06T20:00:20Z","cross_cats_sorted":[],"title_canon_sha256":"dd6ab62f20ba9aaa061b273c56f3e43d9bacaba4e256dd9af17ddb4d69a94adf","abstract_canon_sha256":"87f7c1ee231fa894f75c88128dfc7f2ae53fb42eaef2982dfd57f192493e293c"},"schema_version":"1.0"},"canonical_sha256":"0b0e4f06d9214059068dfea5279b87cbf1d6c755fd8dffb38babcd4e489c5370","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:02.300978Z","signature_b64":"NK5lpKdqeBZd3ZfeBUeNCceEsCnVT2z+H8aJasJQqWL+/XkypPp0wZE/oLKAo+RM5bI1pCf1ArFNsRV0KZOZDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b0e4f06d9214059068dfea5279b87cbf1d6c755fd8dffb38babcd4e489c5370","last_reissued_at":"2026-05-18T01:07:02.300166Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:02.300166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0109129","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":"2026-05-18T01:07:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wjmi9lka/8/CnzRUGrRTQffTfHx9cpOMFSa/RuRU7z6XKDfZEP9MiJckORYuUDcLMDvgLbcPfbkbzYaPRrE9Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T06:34:56.027788Z"},"content_sha256":"64454af7b6411a2463c6a24a49a41e04ef06d13f6b2565604bc78dd4944b972f","schema_version":"1.0","event_id":"sha256:64454af7b6411a2463c6a24a49a41e04ef06d13f6b2565604bc78dd4944b972f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:BMHE6BWZEFAFSBUN72SSPG4HZP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Josephson tunnelling spectroscopy of negative U centers","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Boris Moyzhes, Steven Kivelson, Theodore Geballe, Vadim Oganesyan","submitted_at":"2001-09-06T20:00:20Z","abstract_excerpt":"We consider a superconductor-insulator-superconductor (SIS) junction in which the tunnelling through the insulating barrier is dominated by a localized ``negative U'' center. We show that the $I_{c}R$ product of the junction depends sensitively on the spectrum of impurity states, and in near resonant condiditions exhibits an anomalously large I$_c$R product which can exceed the famous Ambegoakar-Baratoff limit by an arbitrarily large factor. The analysis is extended to problems in which there is an array of negative U centers in the junction. We also discuss general reasons to expect significa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0109129","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":"2026-05-18T01:07:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w6nN8J8c/llydjft5XKPji0Ju7c4KSTCHsyjrsIok7RMmPHPhJtza85jCWDFh/IQwvtMZ6JiEvEEd2pDCT52DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T06:34:56.028508Z"},"content_sha256":"eb6dc1eb917fad3d751a293c1a460bea52234f836834ca0eadc697fed03864b9","schema_version":"1.0","event_id":"sha256:eb6dc1eb917fad3d751a293c1a460bea52234f836834ca0eadc697fed03864b9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BMHE6BWZEFAFSBUN72SSPG4HZP/bundle.json","state_url":"https://pith.science/pith/BMHE6BWZEFAFSBUN72SSPG4HZP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BMHE6BWZEFAFSBUN72SSPG4HZP/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":"2026-06-09T06:34:56Z","links":{"resolver":"https://pith.science/pith/BMHE6BWZEFAFSBUN72SSPG4HZP","bundle":"https://pith.science/pith/BMHE6BWZEFAFSBUN72SSPG4HZP/bundle.json","state":"https://pith.science/pith/BMHE6BWZEFAFSBUN72SSPG4HZP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BMHE6BWZEFAFSBUN72SSPG4HZP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:BMHE6BWZEFAFSBUN72SSPG4HZP","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":"87f7c1ee231fa894f75c88128dfc7f2ae53fb42eaef2982dfd57f192493e293c","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-09-06T20:00:20Z","title_canon_sha256":"dd6ab62f20ba9aaa061b273c56f3e43d9bacaba4e256dd9af17ddb4d69a94adf"},"schema_version":"1.0","source":{"id":"cond-mat/0109129","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0109129","created_at":"2026-05-18T01:07:02Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0109129v1","created_at":"2026-05-18T01:07:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0109129","created_at":"2026-05-18T01:07:02Z"},{"alias_kind":"pith_short_12","alias_value":"BMHE6BWZEFAF","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"BMHE6BWZEFAFSBUN","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"BMHE6BWZ","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:eb6dc1eb917fad3d751a293c1a460bea52234f836834ca0eadc697fed03864b9","target":"graph","created_at":"2026-05-18T01:07:02Z","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":"We consider a superconductor-insulator-superconductor (SIS) junction in which the tunnelling through the insulating barrier is dominated by a localized ``negative U'' center. We show that the $I_{c}R$ product of the junction depends sensitively on the spectrum of impurity states, and in near resonant condiditions exhibits an anomalously large I$_c$R product which can exceed the famous Ambegoakar-Baratoff limit by an arbitrarily large factor. The analysis is extended to problems in which there is an array of negative U centers in the junction. We also discuss general reasons to expect significa","authors_text":"Boris Moyzhes, Steven Kivelson, Theodore Geballe, Vadim Oganesyan","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-09-06T20:00:20Z","title":"Josephson tunnelling spectroscopy of negative U centers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0109129","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":"sha256:64454af7b6411a2463c6a24a49a41e04ef06d13f6b2565604bc78dd4944b972f","target":"record","created_at":"2026-05-18T01:07:02Z","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":"87f7c1ee231fa894f75c88128dfc7f2ae53fb42eaef2982dfd57f192493e293c","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-09-06T20:00:20Z","title_canon_sha256":"dd6ab62f20ba9aaa061b273c56f3e43d9bacaba4e256dd9af17ddb4d69a94adf"},"schema_version":"1.0","source":{"id":"cond-mat/0109129","kind":"arxiv","version":1}},"canonical_sha256":"0b0e4f06d9214059068dfea5279b87cbf1d6c755fd8dffb38babcd4e489c5370","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0b0e4f06d9214059068dfea5279b87cbf1d6c755fd8dffb38babcd4e489c5370","first_computed_at":"2026-05-18T01:07:02.300166Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:02.300166Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NK5lpKdqeBZd3ZfeBUeNCceEsCnVT2z+H8aJasJQqWL+/XkypPp0wZE/oLKAo+RM5bI1pCf1ArFNsRV0KZOZDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:02.300978Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0109129","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:64454af7b6411a2463c6a24a49a41e04ef06d13f6b2565604bc78dd4944b972f","sha256:eb6dc1eb917fad3d751a293c1a460bea52234f836834ca0eadc697fed03864b9"],"state_sha256":"45fafe69a2dec7e491240ffe474642d9cff016be918bc08049bb1d0c69f95730"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ouKMudUEtd1uvz+gafQoZx3v0vbeNxtNvlh0YYjdv439SCJEErsof6x9I7/XlAFpIWjYkFb73ISMzyDdTCykAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T06:34:56.033177Z","bundle_sha256":"5e0503cf3340ff633b8cbe55ab39949df2b41e67ff6f1303932dd556bba4d735"}}