{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:QB7SV4ZBDVYZU6YWJMH4ONF7FP","short_pith_number":"pith:QB7SV4ZB","canonical_record":{"source":{"id":"1509.05769","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-09-18T17:29:03Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"b034c739edb8272a26fb23c08a64d6616a6e95626a4f627f58962ad3664d8d26","abstract_canon_sha256":"3736eaa789ccdcb8834a161985cd3dca73ed1fb4373c29ba08ca9812c512613a"},"schema_version":"1.0"},"canonical_sha256":"807f2af3211d719a7b164b0fc734bf2bccc1ed09559c563103867f0a481e7b3c","source":{"kind":"arxiv","id":"1509.05769","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.05769","created_at":"2026-05-18T00:46:22Z"},{"alias_kind":"arxiv_version","alias_value":"1509.05769v1","created_at":"2026-05-18T00:46:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.05769","created_at":"2026-05-18T00:46:22Z"},{"alias_kind":"pith_short_12","alias_value":"QB7SV4ZBDVYZ","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QB7SV4ZBDVYZU6YW","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QB7SV4ZB","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:QB7SV4ZBDVYZU6YWJMH4ONF7FP","target":"record","payload":{"canonical_record":{"source":{"id":"1509.05769","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-09-18T17:29:03Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"b034c739edb8272a26fb23c08a64d6616a6e95626a4f627f58962ad3664d8d26","abstract_canon_sha256":"3736eaa789ccdcb8834a161985cd3dca73ed1fb4373c29ba08ca9812c512613a"},"schema_version":"1.0"},"canonical_sha256":"807f2af3211d719a7b164b0fc734bf2bccc1ed09559c563103867f0a481e7b3c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:46:22.653497Z","signature_b64":"Iqm/sGkIjU47ckVky3Vq/4cqFwNDCVresaDXQD64W2kXohV+eX+YPRD78q8aUVfRKaakLDC1q/qjoTO6ZnQSDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"807f2af3211d719a7b164b0fc734bf2bccc1ed09559c563103867f0a481e7b3c","last_reissued_at":"2026-05-18T00:46:22.652969Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:46:22.652969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.05769","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":"2026-05-18T00:46:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n5KUCY0JPrmHmD+qs9ypsGie9ptC5CUrJzai86fF9bauRjwf51vsLWFMD2h1eECJnfMh7wLe5Hzj9V848KXsCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T06:36:20.269855Z"},"content_sha256":"e93cffb8e6c6632ad1b6fe639fdb3bd37c9ecc7b591117d703ddbd03b0cd9a0b","schema_version":"1.0","event_id":"sha256:e93cffb8e6c6632ad1b6fe639fdb3bd37c9ecc7b591117d703ddbd03b0cd9a0b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:QB7SV4ZBDVYZU6YWJMH4ONF7FP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Heavy Fermions and the Kondo Lattice: a 21st Century Perspective","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.str-el","authors_text":"Piers Coleman","submitted_at":"2015-09-18T17:29:03Z","abstract_excerpt":"These lecture notes give a brief introduction to heavy fermion physics, emphasizing aspects of particular modern interest. Following an introduction to the Kondo effect and the phenomenology of heavy fermions, the article introduces Kondo insulators, the simplest heavy fermions; the large N expansion for the Kondo lattice; heavy fermion superconductivity including the symplectic N approach; topological Kondo insulators and finally a discussion of the challenge of understanding the co-existence of magnetism and the Kondo effect."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05769","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":"2026-05-18T00:46:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y1wJVyVrJPzr39jOoEbdM248G2ewib2oripiXLBbO9w13luFodNNZsjZs5GmmMEenbn9uYDJI0QPOpmz0QfvCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T06:36:20.270564Z"},"content_sha256":"be94765ada800583d5cb271b83b64b951ad3257d52b4439311e1812529452839","schema_version":"1.0","event_id":"sha256:be94765ada800583d5cb271b83b64b951ad3257d52b4439311e1812529452839"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QB7SV4ZBDVYZU6YWJMH4ONF7FP/bundle.json","state_url":"https://pith.science/pith/QB7SV4ZBDVYZU6YWJMH4ONF7FP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QB7SV4ZBDVYZU6YWJMH4ONF7FP/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":"2026-05-25T06:36:20Z","links":{"resolver":"https://pith.science/pith/QB7SV4ZBDVYZU6YWJMH4ONF7FP","bundle":"https://pith.science/pith/QB7SV4ZBDVYZU6YWJMH4ONF7FP/bundle.json","state":"https://pith.science/pith/QB7SV4ZBDVYZU6YWJMH4ONF7FP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QB7SV4ZBDVYZU6YWJMH4ONF7FP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QB7SV4ZBDVYZU6YWJMH4ONF7FP","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":"3736eaa789ccdcb8834a161985cd3dca73ed1fb4373c29ba08ca9812c512613a","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-09-18T17:29:03Z","title_canon_sha256":"b034c739edb8272a26fb23c08a64d6616a6e95626a4f627f58962ad3664d8d26"},"schema_version":"1.0","source":{"id":"1509.05769","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.05769","created_at":"2026-05-18T00:46:22Z"},{"alias_kind":"arxiv_version","alias_value":"1509.05769v1","created_at":"2026-05-18T00:46:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.05769","created_at":"2026-05-18T00:46:22Z"},{"alias_kind":"pith_short_12","alias_value":"QB7SV4ZBDVYZ","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QB7SV4ZBDVYZU6YW","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QB7SV4ZB","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:be94765ada800583d5cb271b83b64b951ad3257d52b4439311e1812529452839","target":"graph","created_at":"2026-05-18T00:46:22Z","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":"These lecture notes give a brief introduction to heavy fermion physics, emphasizing aspects of particular modern interest. Following an introduction to the Kondo effect and the phenomenology of heavy fermions, the article introduces Kondo insulators, the simplest heavy fermions; the large N expansion for the Kondo lattice; heavy fermion superconductivity including the symplectic N approach; topological Kondo insulators and finally a discussion of the challenge of understanding the co-existence of magnetism and the Kondo effect.","authors_text":"Piers Coleman","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-09-18T17:29:03Z","title":"Heavy Fermions and the Kondo Lattice: a 21st Century Perspective"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.05769","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:e93cffb8e6c6632ad1b6fe639fdb3bd37c9ecc7b591117d703ddbd03b0cd9a0b","target":"record","created_at":"2026-05-18T00:46:22Z","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":"3736eaa789ccdcb8834a161985cd3dca73ed1fb4373c29ba08ca9812c512613a","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-09-18T17:29:03Z","title_canon_sha256":"b034c739edb8272a26fb23c08a64d6616a6e95626a4f627f58962ad3664d8d26"},"schema_version":"1.0","source":{"id":"1509.05769","kind":"arxiv","version":1}},"canonical_sha256":"807f2af3211d719a7b164b0fc734bf2bccc1ed09559c563103867f0a481e7b3c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"807f2af3211d719a7b164b0fc734bf2bccc1ed09559c563103867f0a481e7b3c","first_computed_at":"2026-05-18T00:46:22.652969Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:22.652969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Iqm/sGkIjU47ckVky3Vq/4cqFwNDCVresaDXQD64W2kXohV+eX+YPRD78q8aUVfRKaakLDC1q/qjoTO6ZnQSDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:22.653497Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.05769","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e93cffb8e6c6632ad1b6fe639fdb3bd37c9ecc7b591117d703ddbd03b0cd9a0b","sha256:be94765ada800583d5cb271b83b64b951ad3257d52b4439311e1812529452839"],"state_sha256":"768b6906da7f6aa5019b8636f7c620bfb29c8a0ed00fdc971cd4ca9fe7ab2593"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aENHIH6QIwxJnLgjlwpynYzIrx71zbMGWiau0Ba5aLeVJ9Fqd08OU5OdlKo2JK5Y3jLqj0FDEqEi5AE5Pj0CDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T06:36:20.274166Z","bundle_sha256":"1878dcefdc2e000576bf6564781b220c0159001f497435e2c0d4aa34bfdc7bf0"}}