{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1995:PETLW5ZGLVZCYFMUIYPZCWRHBW","short_pith_number":"pith:PETLW5ZG","schema_version":"1.0","canonical_sha256":"7926bb77265d722c1594461f915a270d889b5289cf25432baba5db89d0498d7f","source":{"kind":"arxiv","id":"cond-mat/9509010","version":2},"attestation_state":"computed","paper":{"title":"Impurity Energy Level Within The Haldane Gap","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat","authors_text":"Lu Yu, Shaojin Qin, Wei Wang, Zhaobin Su, Zhong-Yi Lu","submitted_at":"1995-09-04T15:45:06Z","abstract_excerpt":"An impurity bond $J{'}$ in a periodic 1D antiferromagnetic, spin 1 chain with exchange $J$ is considered. Using the numerical density matrix renormalization group method, we find an impurity energy level in the Haldane gap, corresponding to a bound state near the impurity bond. When $J{'}<J$ the level changes gradually from the edge of the Haldane gap to the ground state energy as the deviation $dev=(J-J{'})/J$ changes from 0 to 1. It seems that there is no threshold. Yet, there is a threshold when $J{'}>J$. The impurity level appears only when the deviation $dev=(J{'}-J)/J{'}$ is greater than"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"cond-mat/9509010","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"1995-09-04T15:45:06Z","cross_cats_sorted":[],"title_canon_sha256":"1d2ebe3a0bffe51101c3244208a17f806a0d47d49bc2cf82d073fec7f3b0d914","abstract_canon_sha256":"48c4ebf3c6b6f0d6336bdc3f99f0924314f48f52a22ac5d34d3c62fd82743a35"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:11.203096Z","signature_b64":"WcLscXRGZ3cvuzUmH2n8TwBHhYuIQ4TvG4BLssahpwSUibt9rmw0aUjuFJuM/H+UA4N18ImeyBceVTGh6HZQBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7926bb77265d722c1594461f915a270d889b5289cf25432baba5db89d0498d7f","last_reissued_at":"2026-05-18T01:07:11.202461Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:11.202461Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Impurity Energy Level Within The Haldane Gap","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat","authors_text":"Lu Yu, Shaojin Qin, Wei Wang, Zhaobin Su, Zhong-Yi Lu","submitted_at":"1995-09-04T15:45:06Z","abstract_excerpt":"An impurity bond $J{'}$ in a periodic 1D antiferromagnetic, spin 1 chain with exchange $J$ is considered. Using the numerical density matrix renormalization group method, we find an impurity energy level in the Haldane gap, corresponding to a bound state near the impurity bond. When $J{'}<J$ the level changes gradually from the edge of the Haldane gap to the ground state energy as the deviation $dev=(J-J{'})/J$ changes from 0 to 1. It seems that there is no threshold. Yet, there is a threshold when $J{'}>J$. The impurity level appears only when the deviation $dev=(J{'}-J)/J{'}$ is greater than"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9509010","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9509010","created_at":"2026-05-18T01:07:11.202572+00:00"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9509010v2","created_at":"2026-05-18T01:07:11.202572+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9509010","created_at":"2026-05-18T01:07:11.202572+00:00"},{"alias_kind":"pith_short_12","alias_value":"PETLW5ZGLVZC","created_at":"2026-05-18T12:25:47.700082+00:00"},{"alias_kind":"pith_short_16","alias_value":"PETLW5ZGLVZCYFMU","created_at":"2026-05-18T12:25:47.700082+00:00"},{"alias_kind":"pith_short_8","alias_value":"PETLW5ZG","created_at":"2026-05-18T12:25:47.700082+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW","json":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW.json","graph_json":"https://pith.science/api/pith-number/PETLW5ZGLVZCYFMUIYPZCWRHBW/graph.json","events_json":"https://pith.science/api/pith-number/PETLW5ZGLVZCYFMUIYPZCWRHBW/events.json","paper":"https://pith.science/paper/PETLW5ZG"},"agent_actions":{"view_html":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW","download_json":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW.json","view_paper":"https://pith.science/paper/PETLW5ZG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=cond-mat/9509010&json=true","fetch_graph":"https://pith.science/api/pith-number/PETLW5ZGLVZCYFMUIYPZCWRHBW/graph.json","fetch_events":"https://pith.science/api/pith-number/PETLW5ZGLVZCYFMUIYPZCWRHBW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW/action/storage_attestation","attest_author":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW/action/author_attestation","sign_citation":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW/action/citation_signature","submit_replication":"https://pith.science/pith/PETLW5ZGLVZCYFMUIYPZCWRHBW/action/replication_record"}},"created_at":"2026-05-18T01:07:11.202572+00:00","updated_at":"2026-05-18T01:07:11.202572+00:00"}