{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:BTV2J3K5OF4CTBV5GRKOL33E27","short_pith_number":"pith:BTV2J3K5","canonical_record":{"source":{"id":"1607.05216","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-18T17:45:03Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"3e45bd7a42770f5902db7f089a20ec544d9c576ed42fd06cc77b68c0348b67e2","abstract_canon_sha256":"a66e4c1c7e41ad073336f7d4fa60185bbd786847cf7a0445cde1a5371d7240c5"},"schema_version":"1.0"},"canonical_sha256":"0ceba4ed5d71782986bd3454e5ef64d7dd0db957721fb44b9efb6a01eb4a8f1e","source":{"kind":"arxiv","id":"1607.05216","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.05216","created_at":"2026-05-18T00:45:48Z"},{"alias_kind":"arxiv_version","alias_value":"1607.05216v1","created_at":"2026-05-18T00:45:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.05216","created_at":"2026-05-18T00:45:48Z"},{"alias_kind":"pith_short_12","alias_value":"BTV2J3K5OF4C","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"BTV2J3K5OF4CTBV5","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"BTV2J3K5","created_at":"2026-05-18T12:30:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:BTV2J3K5OF4CTBV5GRKOL33E27","target":"record","payload":{"canonical_record":{"source":{"id":"1607.05216","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-18T17:45:03Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"3e45bd7a42770f5902db7f089a20ec544d9c576ed42fd06cc77b68c0348b67e2","abstract_canon_sha256":"a66e4c1c7e41ad073336f7d4fa60185bbd786847cf7a0445cde1a5371d7240c5"},"schema_version":"1.0"},"canonical_sha256":"0ceba4ed5d71782986bd3454e5ef64d7dd0db957721fb44b9efb6a01eb4a8f1e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:45:48.951545Z","signature_b64":"JtyI0pwERr6dkAVICokxZMe7AwtigFZYHm4O+S1QAXQOgBRxDaXJjRDyTp/VIOhn4KCbwRU8HYvG/e86RsOhAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ceba4ed5d71782986bd3454e5ef64d7dd0db957721fb44b9efb6a01eb4a8f1e","last_reissued_at":"2026-05-18T00:45:48.951037Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:45:48.951037Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.05216","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":"2026-05-18T00:45:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HsBUtPLM+krJtLhlzIcclyPCN2bzLSV1/tST0/ZkaZJJzlG4ijymNBRgZpv8udzVZnA3eAmoZ8tXOKG7G8abBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:58:07.565451Z"},"content_sha256":"60a8e1387af7dd19c8ddf86603aacb2d400f13d34a087eaf293fcbf641a3070d","schema_version":"1.0","event_id":"sha256:60a8e1387af7dd19c8ddf86603aacb2d400f13d34a087eaf293fcbf641a3070d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:BTV2J3K5OF4CTBV5GRKOL33E27","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhancement of critical temperature in fractal metamaterial superconductors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"cond-mat.supr-con","authors_text":"Igor I. Smolyaninov, Vera N. Smolyaninova","submitted_at":"2016-07-18T17:45:03Z","abstract_excerpt":"Fractal metamaterial superconductor geometry has been suggested and analyzed based on the recently developed theoretical description of critical temperature increase in epsilon near zero (ENZ) metamaterial superconductors. Considerable enhancement of critical temperature has been predicted in such materials due to appearance of large number of additional poles in the inverse dielectric response function of the fractal. Our results agree with the recent observation (Fratini et al. Nature 466, 841 (2010)) that fractal defect structure promotes superconductivity."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.05216","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":"2026-05-18T00:45:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wca/yvMEnFW8APQjtl46DFM7I5j6QHP9ZTzQF7FHkMcQYL/yTmh+cKwfP9tAZObENBhlllm4F3gKl/KCajAzBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:58:07.566419Z"},"content_sha256":"f0c535363eba10f79b568795d5c42744a7a41ed50f44ab2b587a3fdd6c096126","schema_version":"1.0","event_id":"sha256:f0c535363eba10f79b568795d5c42744a7a41ed50f44ab2b587a3fdd6c096126"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BTV2J3K5OF4CTBV5GRKOL33E27/bundle.json","state_url":"https://pith.science/pith/BTV2J3K5OF4CTBV5GRKOL33E27/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BTV2J3K5OF4CTBV5GRKOL33E27/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":"2026-05-30T08:58:07Z","links":{"resolver":"https://pith.science/pith/BTV2J3K5OF4CTBV5GRKOL33E27","bundle":"https://pith.science/pith/BTV2J3K5OF4CTBV5GRKOL33E27/bundle.json","state":"https://pith.science/pith/BTV2J3K5OF4CTBV5GRKOL33E27/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BTV2J3K5OF4CTBV5GRKOL33E27/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:BTV2J3K5OF4CTBV5GRKOL33E27","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":"a66e4c1c7e41ad073336f7d4fa60185bbd786847cf7a0445cde1a5371d7240c5","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-18T17:45:03Z","title_canon_sha256":"3e45bd7a42770f5902db7f089a20ec544d9c576ed42fd06cc77b68c0348b67e2"},"schema_version":"1.0","source":{"id":"1607.05216","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.05216","created_at":"2026-05-18T00:45:48Z"},{"alias_kind":"arxiv_version","alias_value":"1607.05216v1","created_at":"2026-05-18T00:45:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.05216","created_at":"2026-05-18T00:45:48Z"},{"alias_kind":"pith_short_12","alias_value":"BTV2J3K5OF4C","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"BTV2J3K5OF4CTBV5","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"BTV2J3K5","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:f0c535363eba10f79b568795d5c42744a7a41ed50f44ab2b587a3fdd6c096126","target":"graph","created_at":"2026-05-18T00:45:48Z","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":"Fractal metamaterial superconductor geometry has been suggested and analyzed based on the recently developed theoretical description of critical temperature increase in epsilon near zero (ENZ) metamaterial superconductors. Considerable enhancement of critical temperature has been predicted in such materials due to appearance of large number of additional poles in the inverse dielectric response function of the fractal. Our results agree with the recent observation (Fratini et al. Nature 466, 841 (2010)) that fractal defect structure promotes superconductivity.","authors_text":"Igor I. Smolyaninov, Vera N. Smolyaninova","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-18T17:45:03Z","title":"Enhancement of critical temperature in fractal metamaterial superconductors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.05216","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":"sha256:60a8e1387af7dd19c8ddf86603aacb2d400f13d34a087eaf293fcbf641a3070d","target":"record","created_at":"2026-05-18T00:45:48Z","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":"a66e4c1c7e41ad073336f7d4fa60185bbd786847cf7a0445cde1a5371d7240c5","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-18T17:45:03Z","title_canon_sha256":"3e45bd7a42770f5902db7f089a20ec544d9c576ed42fd06cc77b68c0348b67e2"},"schema_version":"1.0","source":{"id":"1607.05216","kind":"arxiv","version":1}},"canonical_sha256":"0ceba4ed5d71782986bd3454e5ef64d7dd0db957721fb44b9efb6a01eb4a8f1e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0ceba4ed5d71782986bd3454e5ef64d7dd0db957721fb44b9efb6a01eb4a8f1e","first_computed_at":"2026-05-18T00:45:48.951037Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:45:48.951037Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JtyI0pwERr6dkAVICokxZMe7AwtigFZYHm4O+S1QAXQOgBRxDaXJjRDyTp/VIOhn4KCbwRU8HYvG/e86RsOhAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:45:48.951545Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.05216","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:60a8e1387af7dd19c8ddf86603aacb2d400f13d34a087eaf293fcbf641a3070d","sha256:f0c535363eba10f79b568795d5c42744a7a41ed50f44ab2b587a3fdd6c096126"],"state_sha256":"ab7363bd34c3d97d36e31a658f3fe83494039b5b18b51a15213fa9ddaa296a74"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dP0uyujR02UDxCy7PJo7gflq7OrzVgOfuVhGrP78D46DRaBXYS+jrpDM2jYCW9esEOq4opxv0YhMJEjIss6fDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:58:07.570627Z","bundle_sha256":"0b234e832dd0198681ad04b5723ef1856cddd68419c211b53d8a9203404957c6"}}