{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:ANULQYTJ5MDWVGXXPMJZBQETV2","short_pith_number":"pith:ANULQYTJ","canonical_record":{"source":{"id":"1003.0765","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-03-03T10:29:55Z","cross_cats_sorted":[],"title_canon_sha256":"7c5b39937cf626c228d06c2e06d3d06a39e32c81325d85084aec9c0fad072c7f","abstract_canon_sha256":"6a4965a5bf0af87ba799e5a8398603e5d7cd6f9d3877e468f74729ef731f6ae2"},"schema_version":"1.0"},"canonical_sha256":"0368b86269eb076a9af77b1390c093ae9569eb94487f49f8875d32778445aba5","source":{"kind":"arxiv","id":"1003.0765","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.0765","created_at":"2026-05-18T02:08:47Z"},{"alias_kind":"arxiv_version","alias_value":"1003.0765v2","created_at":"2026-05-18T02:08:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.0765","created_at":"2026-05-18T02:08:47Z"},{"alias_kind":"pith_short_12","alias_value":"ANULQYTJ5MDW","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"ANULQYTJ5MDWVGXX","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"ANULQYTJ","created_at":"2026-05-18T12:26:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:ANULQYTJ5MDWVGXXPMJZBQETV2","target":"record","payload":{"canonical_record":{"source":{"id":"1003.0765","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-03-03T10:29:55Z","cross_cats_sorted":[],"title_canon_sha256":"7c5b39937cf626c228d06c2e06d3d06a39e32c81325d85084aec9c0fad072c7f","abstract_canon_sha256":"6a4965a5bf0af87ba799e5a8398603e5d7cd6f9d3877e468f74729ef731f6ae2"},"schema_version":"1.0"},"canonical_sha256":"0368b86269eb076a9af77b1390c093ae9569eb94487f49f8875d32778445aba5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:08:47.210281Z","signature_b64":"QyeZbSKTma707rEx9m0nN1iOBbzLkFEWLpkUqGaKhmF7wPVv8b3gPtHK+9G2IANMNOxVKY/bd5Mx5NRi1mTbCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0368b86269eb076a9af77b1390c093ae9569eb94487f49f8875d32778445aba5","last_reissued_at":"2026-05-18T02:08:47.209798Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:08:47.209798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1003.0765","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:08:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"abw8S9pWsje5k6fcHq02P1J44Q6hkVrxW8D59HwN48N+jWNlQBtTFp9oI7ks/VXojtTJ2lCJG4CcRXyLwoxOBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T14:20:51.793527Z"},"content_sha256":"d5430b4066fab4575628acea6a7c7c8d2f30fdcd998443094533cfc6b08f7df8","schema_version":"1.0","event_id":"sha256:d5430b4066fab4575628acea6a7c7c8d2f30fdcd998443094533cfc6b08f7df8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:ANULQYTJ5MDWVGXXPMJZBQETV2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectral signatures of the BCS-BEC crossover in the excitonic insulator phase of the extended Falicov-Kimball model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Holger Fehske, Klaus W. Becker, Nham Van Phan","submitted_at":"2010-03-03T10:29:55Z","abstract_excerpt":"We explore the spontaneous formation of an excitonic insulator state at the semimetal-semiconductor transition of mixed-valence materials in the framework of the spinless Falicov-Kimball model with direct $f$-$f$ electron hopping. Adapting the projector-based renormalization method, we obtain a set of renormalization differential equations for the extended Falicov-Kimball model parameters and finally derive analytical expressions for the order parameter, as well as for the renormalized $c$- and $f$-electron dispersions, momentum distributions, and wave-vector resolved single-particle spectral "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.0765","kind":"arxiv","version":2},"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":"2026-05-18T02:08:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/HxCAXwMfOVsxrwuxjcQULFcbZ69ZXguFEwU3FAjArCrK211lZqVUiQdBKnN4gNW2TnXYx2wPOZYeKXD7f3BCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T14:20:51.794240Z"},"content_sha256":"9afe0952a0f412ea3b8255de1017b840d6c19879048a9830d6f48838d58a1ae2","schema_version":"1.0","event_id":"sha256:9afe0952a0f412ea3b8255de1017b840d6c19879048a9830d6f48838d58a1ae2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ANULQYTJ5MDWVGXXPMJZBQETV2/bundle.json","state_url":"https://pith.science/pith/ANULQYTJ5MDWVGXXPMJZBQETV2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ANULQYTJ5MDWVGXXPMJZBQETV2/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":"2026-05-27T14:20:51Z","links":{"resolver":"https://pith.science/pith/ANULQYTJ5MDWVGXXPMJZBQETV2","bundle":"https://pith.science/pith/ANULQYTJ5MDWVGXXPMJZBQETV2/bundle.json","state":"https://pith.science/pith/ANULQYTJ5MDWVGXXPMJZBQETV2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ANULQYTJ5MDWVGXXPMJZBQETV2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:ANULQYTJ5MDWVGXXPMJZBQETV2","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":"6a4965a5bf0af87ba799e5a8398603e5d7cd6f9d3877e468f74729ef731f6ae2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-03-03T10:29:55Z","title_canon_sha256":"7c5b39937cf626c228d06c2e06d3d06a39e32c81325d85084aec9c0fad072c7f"},"schema_version":"1.0","source":{"id":"1003.0765","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1003.0765","created_at":"2026-05-18T02:08:47Z"},{"alias_kind":"arxiv_version","alias_value":"1003.0765v2","created_at":"2026-05-18T02:08:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.0765","created_at":"2026-05-18T02:08:47Z"},{"alias_kind":"pith_short_12","alias_value":"ANULQYTJ5MDW","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"ANULQYTJ5MDWVGXX","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"ANULQYTJ","created_at":"2026-05-18T12:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:9afe0952a0f412ea3b8255de1017b840d6c19879048a9830d6f48838d58a1ae2","target":"graph","created_at":"2026-05-18T02:08:47Z","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 explore the spontaneous formation of an excitonic insulator state at the semimetal-semiconductor transition of mixed-valence materials in the framework of the spinless Falicov-Kimball model with direct $f$-$f$ electron hopping. Adapting the projector-based renormalization method, we obtain a set of renormalization differential equations for the extended Falicov-Kimball model parameters and finally derive analytical expressions for the order parameter, as well as for the renormalized $c$- and $f$-electron dispersions, momentum distributions, and wave-vector resolved single-particle spectral ","authors_text":"Holger Fehske, Klaus W. Becker, Nham Van Phan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-03-03T10:29:55Z","title":"Spectral signatures of the BCS-BEC crossover in the excitonic insulator phase of the extended Falicov-Kimball model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.0765","kind":"arxiv","version":2},"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:d5430b4066fab4575628acea6a7c7c8d2f30fdcd998443094533cfc6b08f7df8","target":"record","created_at":"2026-05-18T02:08:47Z","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":"6a4965a5bf0af87ba799e5a8398603e5d7cd6f9d3877e468f74729ef731f6ae2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-03-03T10:29:55Z","title_canon_sha256":"7c5b39937cf626c228d06c2e06d3d06a39e32c81325d85084aec9c0fad072c7f"},"schema_version":"1.0","source":{"id":"1003.0765","kind":"arxiv","version":2}},"canonical_sha256":"0368b86269eb076a9af77b1390c093ae9569eb94487f49f8875d32778445aba5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0368b86269eb076a9af77b1390c093ae9569eb94487f49f8875d32778445aba5","first_computed_at":"2026-05-18T02:08:47.209798Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:08:47.209798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QyeZbSKTma707rEx9m0nN1iOBbzLkFEWLpkUqGaKhmF7wPVv8b3gPtHK+9G2IANMNOxVKY/bd5Mx5NRi1mTbCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:08:47.210281Z","signed_message":"canonical_sha256_bytes"},"source_id":"1003.0765","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d5430b4066fab4575628acea6a7c7c8d2f30fdcd998443094533cfc6b08f7df8","sha256:9afe0952a0f412ea3b8255de1017b840d6c19879048a9830d6f48838d58a1ae2"],"state_sha256":"e30e2410750bbae687804f7bafbb5d81e329a2c85941c5671c6e9a01fc5f0ce6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kGi0yHIbnTsgDL8jojaX3N0W6unAY0OAB4oeaI5yac2O1g5T1ZCV7MIeyrhzWPWiaHogdTJvKCOJeTZpWgYwDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T14:20:51.798063Z","bundle_sha256":"302f0f1dd057bdb235d2c083bb3630202316ae4b5972fcd6b78003d79678e00e"}}