{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:UC3ZSUIVUSVNGVDZMSXK626VVO","short_pith_number":"pith:UC3ZSUIV","canonical_record":{"source":{"id":"cond-mat/9704185","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-04-22T14:46:32Z","cross_cats_sorted":[],"title_canon_sha256":"8a8d84867c78bacbc67a6985d9e93ed7f940706b62045c6e272bb69da015cd8d","abstract_canon_sha256":"895f2a89ae3f18db50c41c960e54c4cd0119bff4d61c1840be2ae5ed56bde4b5"},"schema_version":"1.0"},"canonical_sha256":"a0b7995115a4aad3547964aeaf6bd5ab949ac794076dbda8602a21647253c741","source":{"kind":"arxiv","id":"cond-mat/9704185","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9704185","created_at":"2026-05-18T01:39:33Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9704185v1","created_at":"2026-05-18T01:39:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9704185","created_at":"2026-05-18T01:39:33Z"},{"alias_kind":"pith_short_12","alias_value":"UC3ZSUIVUSVN","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"UC3ZSUIVUSVNGVDZ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"UC3ZSUIV","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:UC3ZSUIVUSVNGVDZMSXK626VVO","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9704185","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-04-22T14:46:32Z","cross_cats_sorted":[],"title_canon_sha256":"8a8d84867c78bacbc67a6985d9e93ed7f940706b62045c6e272bb69da015cd8d","abstract_canon_sha256":"895f2a89ae3f18db50c41c960e54c4cd0119bff4d61c1840be2ae5ed56bde4b5"},"schema_version":"1.0"},"canonical_sha256":"a0b7995115a4aad3547964aeaf6bd5ab949ac794076dbda8602a21647253c741","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:39:33.498309Z","signature_b64":"gyqvjrpWYbVIxtOP267lYydFuRLA5jkIiCMmH12egvqbiznxLJXkPcqVCxpQr0dZZBGwPQHXae4ZgT9623OQAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0b7995115a4aad3547964aeaf6bd5ab949ac794076dbda8602a21647253c741","last_reissued_at":"2026-05-18T01:39:33.497835Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:39:33.497835Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9704185","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":"2026-05-18T01:39:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KTF5SSl3kQTLEmuC5wUOxzvQVqqhVdW2/5NWiPZFA8AbJMOgD0Nl8MaH1rC5bnq1aUEQqSEdL4xxFiexCQCvDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T04:15:53.697245Z"},"content_sha256":"d46a27ad021ad9623731062d3bbad1f5e6b0a17f97157d3c7e0c74dcd22a0f62","schema_version":"1.0","event_id":"sha256:d46a27ad021ad9623731062d3bbad1f5e6b0a17f97157d3c7e0c74dcd22a0f62"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:UC3ZSUIVUSVNGVDZMSXK626VVO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Local Enhancement of Antiferromagnetic Correlations by Nonmagnetic Impurities","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Elbio Dagotto, George Balster Martins, Jose Riera, Markus Laukamp","submitted_at":"1997-04-22T14:46:32Z","abstract_excerpt":"The local enhancement of antiferromagnetic correlations near vacancies observed in a variety of spin systems is analyzed in a single framework. Variational calculations suggest that the resonating-valence-bond character of the spin correlations at short distances is responsible for the enhancement. Numerical results for uniform spin chains, with and without frustration, dimerized chains, ladders, and two dimensional clusters are in agreement with our conjecture. This short distance phenomenon occurs independently of the long distance behavior of the spin correlations in the undoped system. Exp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9704185","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":"2026-05-18T01:39:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vVaRLqN/YEVB4y5llo/FV/ZjtfvIF9GKYZoT3R6pddikx3tyaxkDYbMo1WltIacW9whsPEzPvcHHYlY/b2QyCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T04:15:53.697848Z"},"content_sha256":"f792832e9800e3a1f2bd2e0a5a0dd73756610743caae731beddaccf7573f6b48","schema_version":"1.0","event_id":"sha256:f792832e9800e3a1f2bd2e0a5a0dd73756610743caae731beddaccf7573f6b48"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UC3ZSUIVUSVNGVDZMSXK626VVO/bundle.json","state_url":"https://pith.science/pith/UC3ZSUIVUSVNGVDZMSXK626VVO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UC3ZSUIVUSVNGVDZMSXK626VVO/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":"2026-06-06T04:15:53Z","links":{"resolver":"https://pith.science/pith/UC3ZSUIVUSVNGVDZMSXK626VVO","bundle":"https://pith.science/pith/UC3ZSUIVUSVNGVDZMSXK626VVO/bundle.json","state":"https://pith.science/pith/UC3ZSUIVUSVNGVDZMSXK626VVO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UC3ZSUIVUSVNGVDZMSXK626VVO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:UC3ZSUIVUSVNGVDZMSXK626VVO","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":"895f2a89ae3f18db50c41c960e54c4cd0119bff4d61c1840be2ae5ed56bde4b5","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-04-22T14:46:32Z","title_canon_sha256":"8a8d84867c78bacbc67a6985d9e93ed7f940706b62045c6e272bb69da015cd8d"},"schema_version":"1.0","source":{"id":"cond-mat/9704185","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9704185","created_at":"2026-05-18T01:39:33Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9704185v1","created_at":"2026-05-18T01:39:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9704185","created_at":"2026-05-18T01:39:33Z"},{"alias_kind":"pith_short_12","alias_value":"UC3ZSUIVUSVN","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"UC3ZSUIVUSVNGVDZ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"UC3ZSUIV","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:f792832e9800e3a1f2bd2e0a5a0dd73756610743caae731beddaccf7573f6b48","target":"graph","created_at":"2026-05-18T01:39:33Z","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":"The local enhancement of antiferromagnetic correlations near vacancies observed in a variety of spin systems is analyzed in a single framework. Variational calculations suggest that the resonating-valence-bond character of the spin correlations at short distances is responsible for the enhancement. Numerical results for uniform spin chains, with and without frustration, dimerized chains, ladders, and two dimensional clusters are in agreement with our conjecture. This short distance phenomenon occurs independently of the long distance behavior of the spin correlations in the undoped system. Exp","authors_text":"Elbio Dagotto, George Balster Martins, Jose Riera, Markus Laukamp","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-04-22T14:46:32Z","title":"Local Enhancement of Antiferromagnetic Correlations by Nonmagnetic Impurities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9704185","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:d46a27ad021ad9623731062d3bbad1f5e6b0a17f97157d3c7e0c74dcd22a0f62","target":"record","created_at":"2026-05-18T01:39:33Z","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":"895f2a89ae3f18db50c41c960e54c4cd0119bff4d61c1840be2ae5ed56bde4b5","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1997-04-22T14:46:32Z","title_canon_sha256":"8a8d84867c78bacbc67a6985d9e93ed7f940706b62045c6e272bb69da015cd8d"},"schema_version":"1.0","source":{"id":"cond-mat/9704185","kind":"arxiv","version":1}},"canonical_sha256":"a0b7995115a4aad3547964aeaf6bd5ab949ac794076dbda8602a21647253c741","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0b7995115a4aad3547964aeaf6bd5ab949ac794076dbda8602a21647253c741","first_computed_at":"2026-05-18T01:39:33.497835Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:39:33.497835Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gyqvjrpWYbVIxtOP267lYydFuRLA5jkIiCMmH12egvqbiznxLJXkPcqVCxpQr0dZZBGwPQHXae4ZgT9623OQAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:39:33.498309Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9704185","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d46a27ad021ad9623731062d3bbad1f5e6b0a17f97157d3c7e0c74dcd22a0f62","sha256:f792832e9800e3a1f2bd2e0a5a0dd73756610743caae731beddaccf7573f6b48"],"state_sha256":"d37f08d05243aebdf8e1702204bb206c8c3e81fffabb48e7114755bcee5a1447"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9NPvH2lmVz8hKhrSNLj4HUvx/FtoRF+Q8b46YLn36FbofSgIgCv3K/8jfBPPL5WtpDDT1FjseKUTXMzJgCv4CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T04:15:53.700251Z","bundle_sha256":"221e11d6fb0d1320f410753af24b3e0cc7d45da269246ec2ec435d43efa172b8"}}