{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:SMMO5W3K27J4FL3QW3EES3HKBF","short_pith_number":"pith:SMMO5W3K","canonical_record":{"source":{"id":"cond-mat/9905230","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"1999-05-17T08:46:43Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"5c7dfb2885b7acbf90734e9165371860ec3ac10cc45ebe233c73fc17276a7b8e","abstract_canon_sha256":"c4018bc0ce2eff092c1845cd2e92984fbfbf5b8a19377bfc5e06b259561f92e5"},"schema_version":"1.0"},"canonical_sha256":"9318eedb6ad7d3c2af70b6c8496cea09771f6f408e94a442feafabcefaf69549","source":{"kind":"arxiv","id":"cond-mat/9905230","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9905230","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9905230v1","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9905230","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"pith_short_12","alias_value":"SMMO5W3K27J4","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"pith_short_16","alias_value":"SMMO5W3K27J4FL3Q","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"pith_short_8","alias_value":"SMMO5W3K","created_at":"2026-07-04T16:12:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:SMMO5W3K27J4FL3QW3EES3HKBF","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9905230","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"1999-05-17T08:46:43Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"5c7dfb2885b7acbf90734e9165371860ec3ac10cc45ebe233c73fc17276a7b8e","abstract_canon_sha256":"c4018bc0ce2eff092c1845cd2e92984fbfbf5b8a19377bfc5e06b259561f92e5"},"schema_version":"1.0"},"canonical_sha256":"9318eedb6ad7d3c2af70b6c8496cea09771f6f408e94a442feafabcefaf69549","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:12:43.001967Z","signature_b64":"DXSsYvSZkzhnn9s3DA/9U7GrcRyq26fAua80VK8EHAWPb9qOFWmdy+dc0pTx77M+qRFVD1mA3SQl148uAxz5Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9318eedb6ad7d3c2af70b6c8496cea09771f6f408e94a442feafabcefaf69549","last_reissued_at":"2026-07-04T16:12:43.001560Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:12:43.001560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9905230","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":"2026-07-04T16:12:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"crhW7F/R/BjIorbaaeVeoJup6RWBCOxoY2rs1CCpwrQOIRhprechH8Ox6D6rhRMY0OSOos94Ua6J0NBWzSkSDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T00:29:06.711223Z"},"content_sha256":"5f94b6eb47bae023f6d7266336d8f8b082a4e454b470239c35853d90f290eadb","schema_version":"1.0","event_id":"sha256:5f94b6eb47bae023f6d7266336d8f8b082a4e454b470239c35853d90f290eadb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:SMMO5W3K27J4FL3QW3EES3HKBF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Physical Optimization of Quantum Error Correction Circuits","license":"","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat.mes-hall","authors_text":"Daniel Loss, David P. DiVincenzo, Guido Burkard, John A. Smolin","submitted_at":"1999-05-17T08:46:43Z","abstract_excerpt":"Quantum error correcting codes have been developed to protect a quantum computer from decoherence due to a noisy environment. In this paper, we present two methods for optimizing the physical implementation of such error correction schemes. First, we discuss an optimal quantum circuit implementation of the smallest error-correcting code (the three bit code). Quantum circuits are physically implemented by serial pulses, i.e. by switching on and off external parameters in the Hamiltonian one after another. In contrast to this, we introduce a new parallel switching method that allows faster gate "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9905230","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/cond-mat/9905230/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":"2026-07-04T16:12:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"avRnPjJ5MVPVOC5b0Pe3Q1KHzCy/iYyc+oRqVWGul0NiV3jQmUbWojXKpsJm3ibSwJClOFwZoeLyG0UvM0WiAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T00:29:06.712202Z"},"content_sha256":"e14594427bdd45b61a183d25f7673dd42bc6fdb40a1e8cc995299995397b1137","schema_version":"1.0","event_id":"sha256:e14594427bdd45b61a183d25f7673dd42bc6fdb40a1e8cc995299995397b1137"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SMMO5W3K27J4FL3QW3EES3HKBF/bundle.json","state_url":"https://pith.science/pith/SMMO5W3K27J4FL3QW3EES3HKBF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SMMO5W3K27J4FL3QW3EES3HKBF/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":"2026-08-11T00:29:06Z","links":{"resolver":"https://pith.science/pith/SMMO5W3K27J4FL3QW3EES3HKBF","bundle":"https://pith.science/pith/SMMO5W3K27J4FL3QW3EES3HKBF/bundle.json","state":"https://pith.science/pith/SMMO5W3K27J4FL3QW3EES3HKBF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SMMO5W3K27J4FL3QW3EES3HKBF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:SMMO5W3K27J4FL3QW3EES3HKBF","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":"c4018bc0ce2eff092c1845cd2e92984fbfbf5b8a19377bfc5e06b259561f92e5","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"1999-05-17T08:46:43Z","title_canon_sha256":"5c7dfb2885b7acbf90734e9165371860ec3ac10cc45ebe233c73fc17276a7b8e"},"schema_version":"1.0","source":{"id":"cond-mat/9905230","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9905230","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9905230v1","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9905230","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"pith_short_12","alias_value":"SMMO5W3K27J4","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"pith_short_16","alias_value":"SMMO5W3K27J4FL3Q","created_at":"2026-07-04T16:12:43Z"},{"alias_kind":"pith_short_8","alias_value":"SMMO5W3K","created_at":"2026-07-04T16:12:43Z"}],"graph_snapshots":[{"event_id":"sha256:e14594427bdd45b61a183d25f7673dd42bc6fdb40a1e8cc995299995397b1137","target":"graph","created_at":"2026-07-04T16:12:43Z","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/cond-mat/9905230/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum error correcting codes have been developed to protect a quantum computer from decoherence due to a noisy environment. In this paper, we present two methods for optimizing the physical implementation of such error correction schemes. First, we discuss an optimal quantum circuit implementation of the smallest error-correcting code (the three bit code). Quantum circuits are physically implemented by serial pulses, i.e. by switching on and off external parameters in the Hamiltonian one after another. In contrast to this, we introduce a new parallel switching method that allows faster gate ","authors_text":"Daniel Loss, David P. DiVincenzo, Guido Burkard, John A. Smolin","cross_cats":["quant-ph"],"headline":"","license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"1999-05-17T08:46:43Z","title":"Physical Optimization of Quantum Error Correction Circuits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9905230","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":"sha256:5f94b6eb47bae023f6d7266336d8f8b082a4e454b470239c35853d90f290eadb","target":"record","created_at":"2026-07-04T16:12:43Z","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":"c4018bc0ce2eff092c1845cd2e92984fbfbf5b8a19377bfc5e06b259561f92e5","cross_cats_sorted":["quant-ph"],"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"1999-05-17T08:46:43Z","title_canon_sha256":"5c7dfb2885b7acbf90734e9165371860ec3ac10cc45ebe233c73fc17276a7b8e"},"schema_version":"1.0","source":{"id":"cond-mat/9905230","kind":"arxiv","version":1}},"canonical_sha256":"9318eedb6ad7d3c2af70b6c8496cea09771f6f408e94a442feafabcefaf69549","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9318eedb6ad7d3c2af70b6c8496cea09771f6f408e94a442feafabcefaf69549","first_computed_at":"2026-07-04T16:12:43.001560Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:12:43.001560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DXSsYvSZkzhnn9s3DA/9U7GrcRyq26fAua80VK8EHAWPb9qOFWmdy+dc0pTx77M+qRFVD1mA3SQl148uAxz5Bw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:12:43.001967Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9905230","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5f94b6eb47bae023f6d7266336d8f8b082a4e454b470239c35853d90f290eadb","sha256:e14594427bdd45b61a183d25f7673dd42bc6fdb40a1e8cc995299995397b1137"],"state_sha256":"16c314209a742be0dedbfc337f5be55f283fb676994469a8178e83d728b51209"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aFq3ht9GiJaWM2AcYfQDvBqj03M2ruozy5tDYaQ9VL2gufsX3yXSCyGVE+4BlZpFTaj+4PBOIlOFeUVG+eWpCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T00:29:06.718196Z","bundle_sha256":"dcded931510c79a267e5156f005bd0e1aa26f60a2b4e8862313c8835f673ea35"}}