{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:Y55XF6LGH2TFSODIJ7BIPMOJQ7","short_pith_number":"pith:Y55XF6LG","canonical_record":{"source":{"id":"1508.00757","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-08-04T12:52:43Z","cross_cats_sorted":[],"title_canon_sha256":"bf8c7348c5266869a4f11dd5488fc01703720a638392bd6fabb8d5ee8bb789a8","abstract_canon_sha256":"2519eced538abc6e71b6a7adc3562131410c55c3a62413e752206bc0d49ff7c9"},"schema_version":"1.0"},"canonical_sha256":"c77b72f9663ea65938684fc287b1c987f6eea6ef7ac73d3a40f184bf9936df3c","source":{"kind":"arxiv","id":"1508.00757","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00757","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00757v1","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00757","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"pith_short_12","alias_value":"Y55XF6LGH2TF","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"Y55XF6LGH2TFSODI","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"Y55XF6LG","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:Y55XF6LGH2TFSODIJ7BIPMOJQ7","target":"record","payload":{"canonical_record":{"source":{"id":"1508.00757","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-08-04T12:52:43Z","cross_cats_sorted":[],"title_canon_sha256":"bf8c7348c5266869a4f11dd5488fc01703720a638392bd6fabb8d5ee8bb789a8","abstract_canon_sha256":"2519eced538abc6e71b6a7adc3562131410c55c3a62413e752206bc0d49ff7c9"},"schema_version":"1.0"},"canonical_sha256":"c77b72f9663ea65938684fc287b1c987f6eea6ef7ac73d3a40f184bf9936df3c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:43.834764Z","signature_b64":"BhCyYpOkh/yK9SsGuXPlNZWBEdD6rCG2D/WMUw6t7Jct93Oz7R6/I2ulxzf9HaYYcjYvQ+HYSegjak3412UzBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c77b72f9663ea65938684fc287b1c987f6eea6ef7ac73d3a40f184bf9936df3c","last_reissued_at":"2026-05-18T01:18:43.834128Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:43.834128Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.00757","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":"2026-05-18T01:18:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C7fyomQwVOZ4KjxT3vt2zK0zSmE4Cz27T72NWiKCA0sUYsEBowI6RZL+17Jw9WA85XMV6eHm+IbtV0/XpvVNCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T21:12:29.838330Z"},"content_sha256":"815e68ade232ac6dc82cef770b67f1d083014e6ba62cb87d0704f0385992cd70","schema_version":"1.0","event_id":"sha256:815e68ade232ac6dc82cef770b67f1d083014e6ba62cb87d0704f0385992cd70"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:Y55XF6LGH2TFSODIJ7BIPMOJQ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Campbell response in type II superconductors under strong pinning conditions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"G. Blatter, R. Prozorov, R. Willa, V.B. Geshkenbein","submitted_at":"2015-08-04T12:52:43Z","abstract_excerpt":"Measuring the $ac$ magnetic response of a type II superconductor provides valuable information on the pinning landscape (pinscape) of the material. We use strong pinning theory to derive a microscopic expression for the Campbell length $\\lambda_{\\rm \\scriptscriptstyle C}$, the penetration depth of the $ac$ signal. We show that $\\lambda_{\\rm \\scriptscriptstyle C}$ is determined by the jump in the pinning force, in contrast to the critical current $j_c$ which involves the jump in pinning energy. We demonstrate that the Campbell lengths generically differ for zero-field-cooled and field-cooled sa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00757","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":"2026-05-18T01:18:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"18bYEgbIYIWrY86d3F87utUeStPxznTmTPZi6jmHnE8xd1SR5fNhnhwXa8FMiEuDN+FgDAcNwtYGpru+NhKPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T21:12:29.838687Z"},"content_sha256":"365ccd753f549820fc656b5f81b471f5a5c44550cb6357068c7d39334339007c","schema_version":"1.0","event_id":"sha256:365ccd753f549820fc656b5f81b471f5a5c44550cb6357068c7d39334339007c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y55XF6LGH2TFSODIJ7BIPMOJQ7/bundle.json","state_url":"https://pith.science/pith/Y55XF6LGH2TFSODIJ7BIPMOJQ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y55XF6LGH2TFSODIJ7BIPMOJQ7/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":"2026-07-03T21:12:29Z","links":{"resolver":"https://pith.science/pith/Y55XF6LGH2TFSODIJ7BIPMOJQ7","bundle":"https://pith.science/pith/Y55XF6LGH2TFSODIJ7BIPMOJQ7/bundle.json","state":"https://pith.science/pith/Y55XF6LGH2TFSODIJ7BIPMOJQ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y55XF6LGH2TFSODIJ7BIPMOJQ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:Y55XF6LGH2TFSODIJ7BIPMOJQ7","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":"2519eced538abc6e71b6a7adc3562131410c55c3a62413e752206bc0d49ff7c9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-08-04T12:52:43Z","title_canon_sha256":"bf8c7348c5266869a4f11dd5488fc01703720a638392bd6fabb8d5ee8bb789a8"},"schema_version":"1.0","source":{"id":"1508.00757","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00757","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00757v1","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00757","created_at":"2026-05-18T01:18:43Z"},{"alias_kind":"pith_short_12","alias_value":"Y55XF6LGH2TF","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"Y55XF6LGH2TFSODI","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"Y55XF6LG","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:365ccd753f549820fc656b5f81b471f5a5c44550cb6357068c7d39334339007c","target":"graph","created_at":"2026-05-18T01:18:43Z","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":"Measuring the $ac$ magnetic response of a type II superconductor provides valuable information on the pinning landscape (pinscape) of the material. We use strong pinning theory to derive a microscopic expression for the Campbell length $\\lambda_{\\rm \\scriptscriptstyle C}$, the penetration depth of the $ac$ signal. We show that $\\lambda_{\\rm \\scriptscriptstyle C}$ is determined by the jump in the pinning force, in contrast to the critical current $j_c$ which involves the jump in pinning energy. We demonstrate that the Campbell lengths generically differ for zero-field-cooled and field-cooled sa","authors_text":"G. Blatter, R. Prozorov, R. Willa, V.B. Geshkenbein","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-08-04T12:52:43Z","title":"Campbell response in type II superconductors under strong pinning conditions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00757","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":"sha256:815e68ade232ac6dc82cef770b67f1d083014e6ba62cb87d0704f0385992cd70","target":"record","created_at":"2026-05-18T01:18:43Z","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":"2519eced538abc6e71b6a7adc3562131410c55c3a62413e752206bc0d49ff7c9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-08-04T12:52:43Z","title_canon_sha256":"bf8c7348c5266869a4f11dd5488fc01703720a638392bd6fabb8d5ee8bb789a8"},"schema_version":"1.0","source":{"id":"1508.00757","kind":"arxiv","version":1}},"canonical_sha256":"c77b72f9663ea65938684fc287b1c987f6eea6ef7ac73d3a40f184bf9936df3c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c77b72f9663ea65938684fc287b1c987f6eea6ef7ac73d3a40f184bf9936df3c","first_computed_at":"2026-05-18T01:18:43.834128Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:43.834128Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BhCyYpOkh/yK9SsGuXPlNZWBEdD6rCG2D/WMUw6t7Jct93Oz7R6/I2ulxzf9HaYYcjYvQ+HYSegjak3412UzBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:43.834764Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.00757","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:815e68ade232ac6dc82cef770b67f1d083014e6ba62cb87d0704f0385992cd70","sha256:365ccd753f549820fc656b5f81b471f5a5c44550cb6357068c7d39334339007c"],"state_sha256":"eadd5853f6820b6ad6760ae73ebba93634f3a56a21e175585386e5aa433b71c9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wYGNHKB/lHPxd1nr9dmojpdURgglSlug+6IQzuNYmRCd2CaACe126bx1EKhPY++1MyoOyavNRDpimEb9ls8wCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-03T21:12:29.840582Z","bundle_sha256":"6325b172bfb7c65aa91b4c69ba615fbc5cf6842f846e795c6c5b3841cc7a55d5"}}