{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:2L6DYDAZHD2VOSAWJNCKY2WD4B","short_pith_number":"pith:2L6DYDAZ","canonical_record":{"source":{"id":"2605.21277","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2026-05-20T15:08:50Z","cross_cats_sorted":[],"title_canon_sha256":"0b9d19bff7df7c351d87d5d2f8bab918f82366055086b08c8b1c811cf70ebc05","abstract_canon_sha256":"7b1c0c3cebae68256750b96eb0d71fa25016fc6f1876baa96e9fc9a526fa4d72"},"schema_version":"1.0"},"canonical_sha256":"d2fc3c0c1938f55748164b44ac6ac3e07875f16a434a0a0948a72e61cf6560cd","source":{"kind":"arxiv","id":"2605.21277","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.21277","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"arxiv_version","alias_value":"2605.21277v1","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.21277","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"pith_short_12","alias_value":"2L6DYDAZHD2V","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"pith_short_16","alias_value":"2L6DYDAZHD2VOSAW","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"pith_short_8","alias_value":"2L6DYDAZ","created_at":"2026-05-21T02:05:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:2L6DYDAZHD2VOSAWJNCKY2WD4B","target":"record","payload":{"canonical_record":{"source":{"id":"2605.21277","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2026-05-20T15:08:50Z","cross_cats_sorted":[],"title_canon_sha256":"0b9d19bff7df7c351d87d5d2f8bab918f82366055086b08c8b1c811cf70ebc05","abstract_canon_sha256":"7b1c0c3cebae68256750b96eb0d71fa25016fc6f1876baa96e9fc9a526fa4d72"},"schema_version":"1.0"},"canonical_sha256":"d2fc3c0c1938f55748164b44ac6ac3e07875f16a434a0a0948a72e61cf6560cd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-21T02:05:26.685552Z","signature_b64":"CuAYGN1nslyVvt8s3qi0oXh52cqDHeUED6hJMRQywccPaxmOB1mybFb3qEW+wx8Sj3Uf4TsMTfs76EUuk4xdBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2fc3c0c1938f55748164b44ac6ac3e07875f16a434a0a0948a72e61cf6560cd","last_reissued_at":"2026-05-21T02:05:26.684550Z","signature_status":"signed_v1","first_computed_at":"2026-05-21T02:05:26.684550Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.21277","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":"2026-05-21T02:05:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wePe/RJv1NJ3BLhPQdDJrosSpDKYB65gGJ+A5eNF4eoUaZidb6r6f/8SdBfR3Nzr8xK1dD3K4IojZ2oibrZNDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T16:09:59.382878Z"},"content_sha256":"e185b26dd2ac04c3e24f85e966804f3b64ba85043eccaefaacf8d34f7f9f7562","schema_version":"1.0","event_id":"sha256:e185b26dd2ac04c3e24f85e966804f3b64ba85043eccaefaacf8d34f7f9f7562"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:2L6DYDAZHD2VOSAWJNCKY2WD4B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fermion condensation in a generalized Hatsugai-Kohmoto model with momentum-mixing Landau interactions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Andreas R\\\"uckriegel, Jan Heinrich, Peter Kopietz","submitted_at":"2026-05-20T15:08:50Z","abstract_excerpt":"The Hatsugai-Kohmoto (HK) model is an exactly solvable electronic lattice model where the interaction between electrons with opposite spin is diagonal in momentum space. We generalize the HK model by introducing momentum-mixing Landau interactions. Within a self-consistent mean-field analysis we find that the ground state of this model exhibits a partially flat energy band, in agreement with the fermion condensation scenario proposed by Khodel and Shaginyan [JETP Lett. 51, 553 (1990)]. Inspired by Andersons pseudospin formulation of BCS theory, we show that the HK model with Landau interaction"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.21277","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.21277/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-05-21T02:05:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GLRgvti+rhzcdrZawoB4I12+0Pd4Qem7hUvJLb/ec1r2tGyz21zOnoXOLS6Uc0dXb+YWzYAfK5DRWN7+pbTSDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T16:09:59.383449Z"},"content_sha256":"4a7b7d2a3d842085f891564305003972ff15cb214b129d9d9b4a75dd4ea3bfd7","schema_version":"1.0","event_id":"sha256:4a7b7d2a3d842085f891564305003972ff15cb214b129d9d9b4a75dd4ea3bfd7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2L6DYDAZHD2VOSAWJNCKY2WD4B/bundle.json","state_url":"https://pith.science/pith/2L6DYDAZHD2VOSAWJNCKY2WD4B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2L6DYDAZHD2VOSAWJNCKY2WD4B/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":"2026-05-22T16:09:59Z","links":{"resolver":"https://pith.science/pith/2L6DYDAZHD2VOSAWJNCKY2WD4B","bundle":"https://pith.science/pith/2L6DYDAZHD2VOSAWJNCKY2WD4B/bundle.json","state":"https://pith.science/pith/2L6DYDAZHD2VOSAWJNCKY2WD4B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2L6DYDAZHD2VOSAWJNCKY2WD4B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:2L6DYDAZHD2VOSAWJNCKY2WD4B","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":"7b1c0c3cebae68256750b96eb0d71fa25016fc6f1876baa96e9fc9a526fa4d72","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2026-05-20T15:08:50Z","title_canon_sha256":"0b9d19bff7df7c351d87d5d2f8bab918f82366055086b08c8b1c811cf70ebc05"},"schema_version":"1.0","source":{"id":"2605.21277","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.21277","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"arxiv_version","alias_value":"2605.21277v1","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.21277","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"pith_short_12","alias_value":"2L6DYDAZHD2V","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"pith_short_16","alias_value":"2L6DYDAZHD2VOSAW","created_at":"2026-05-21T02:05:26Z"},{"alias_kind":"pith_short_8","alias_value":"2L6DYDAZ","created_at":"2026-05-21T02:05:26Z"}],"graph_snapshots":[{"event_id":"sha256:4a7b7d2a3d842085f891564305003972ff15cb214b129d9d9b4a75dd4ea3bfd7","target":"graph","created_at":"2026-05-21T02:05:26Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2605.21277/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Hatsugai-Kohmoto (HK) model is an exactly solvable electronic lattice model where the interaction between electrons with opposite spin is diagonal in momentum space. We generalize the HK model by introducing momentum-mixing Landau interactions. Within a self-consistent mean-field analysis we find that the ground state of this model exhibits a partially flat energy band, in agreement with the fermion condensation scenario proposed by Khodel and Shaginyan [JETP Lett. 51, 553 (1990)]. Inspired by Andersons pseudospin formulation of BCS theory, we show that the HK model with Landau interaction","authors_text":"Andreas R\\\"uckriegel, Jan Heinrich, Peter Kopietz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2026-05-20T15:08:50Z","title":"Fermion condensation in a generalized Hatsugai-Kohmoto model with momentum-mixing Landau interactions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.21277","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:e185b26dd2ac04c3e24f85e966804f3b64ba85043eccaefaacf8d34f7f9f7562","target":"record","created_at":"2026-05-21T02:05:26Z","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":"7b1c0c3cebae68256750b96eb0d71fa25016fc6f1876baa96e9fc9a526fa4d72","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2026-05-20T15:08:50Z","title_canon_sha256":"0b9d19bff7df7c351d87d5d2f8bab918f82366055086b08c8b1c811cf70ebc05"},"schema_version":"1.0","source":{"id":"2605.21277","kind":"arxiv","version":1}},"canonical_sha256":"d2fc3c0c1938f55748164b44ac6ac3e07875f16a434a0a0948a72e61cf6560cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2fc3c0c1938f55748164b44ac6ac3e07875f16a434a0a0948a72e61cf6560cd","first_computed_at":"2026-05-21T02:05:26.684550Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-21T02:05:26.684550Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CuAYGN1nslyVvt8s3qi0oXh52cqDHeUED6hJMRQywccPaxmOB1mybFb3qEW+wx8Sj3Uf4TsMTfs76EUuk4xdBw==","signature_status":"signed_v1","signed_at":"2026-05-21T02:05:26.685552Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.21277","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e185b26dd2ac04c3e24f85e966804f3b64ba85043eccaefaacf8d34f7f9f7562","sha256:4a7b7d2a3d842085f891564305003972ff15cb214b129d9d9b4a75dd4ea3bfd7"],"state_sha256":"a51ee2bcf344ebe665d179e5101225ce239feb74e949581b80ba8baef542ab45"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"szK7P/N5W/A7FwPLCa5Lp1/bc55dNIe/5/VtbHnV6QbaZgWZjILstrunNJcsjQRAWiBEROu3C1hroolJAP4CDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T16:09:59.386519Z","bundle_sha256":"158ef363dc9aaecf6dbcb924da70ab5be146abbeb5e16c429d3044604377b696"}}