{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:HRMEK6QWRFSUICBTDUW4PPS6YG","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":"9888b8dfd98f126412bdace7d070477454a185b4c068fd5b45dbede937aaae93","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1997-10-16T07:44:16Z","title_canon_sha256":"f647ebf07ec229c3388d332b178bbd9f3961880379acfe2c46c06386a7d41a23"},"schema_version":"1.0","source":{"id":"quant-ph/9710041","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9710041","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9710041v1","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9710041","created_at":"2026-05-18T01:37:53Z"},{"alias_kind":"pith_short_12","alias_value":"HRMEK6QWRFSU","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"HRMEK6QWRFSUICBT","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"HRMEK6QW","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:a175cfd7349e062dabaa6869c687e765bd09e18d5b91fe2585942595fd75a966","target":"graph","created_at":"2026-05-18T01:37:53Z","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 existence is proved of a class of open quantum systems that admits a linear subspace ${\\cal C}$ of the space of states such that the restriction of the dynamical semigroup to the states built over $\\cal C$ is unitary. Such subspace allows for error-avoiding (noiseless) enconding of quantum information.","authors_text":"3), 3) ((1) ISI Foundation, (3) INFM Politecnico di Torino), M. Rasetti (2, Politecnico di Torino, P. Zanardi (1, Torino (2) Dipartimento di fisica","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"1997-10-16T07:44:16Z","title":"Error Avoiding Quantum Codes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9710041","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":"sha256:5657c7732f5add6916adf82fbdea23877e253c3e512a48b9d43039218057e7e7","target":"record","created_at":"2026-05-18T01:37:53Z","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":"9888b8dfd98f126412bdace7d070477454a185b4c068fd5b45dbede937aaae93","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1997-10-16T07:44:16Z","title_canon_sha256":"f647ebf07ec229c3388d332b178bbd9f3961880379acfe2c46c06386a7d41a23"},"schema_version":"1.0","source":{"id":"quant-ph/9710041","kind":"arxiv","version":1}},"canonical_sha256":"3c58457a1689654408331d2dc7be5ec1a6ff40108f0243fbbe07d2a61b06345b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c58457a1689654408331d2dc7be5ec1a6ff40108f0243fbbe07d2a61b06345b","first_computed_at":"2026-05-18T01:37:53.046346Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:53.046346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mPtdhND5l8ELw7RH9k1tr7a0YYQAFvJNQKB3IDgUjX+xnOuGnW3Ip2KsZ0yKCTA6Nc+pXdxKHM+rgfxZHy9lCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:53.046951Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/9710041","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5657c7732f5add6916adf82fbdea23877e253c3e512a48b9d43039218057e7e7","sha256:a175cfd7349e062dabaa6869c687e765bd09e18d5b91fe2585942595fd75a966"],"state_sha256":"86df1cdf69ba875e511b3061b3b11f347309f8afb6a8bef1691bdaaf6d70f018"}