{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:PDVW7CXXDLVQ6MCTDQGJICD3TM","short_pith_number":"pith:PDVW7CXX","canonical_record":{"source":{"id":"2105.13021","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-05-27T09:25:49Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"8ab3dc27f8a169a12d7b8467bac6abd6e0a5ead09682bfc8bda282488e9d12ef","abstract_canon_sha256":"ddf30e94c0b93aee6f5df9757ef77a7b3699846afe3e7f41deb6fa1b85e85868"},"schema_version":"1.0"},"canonical_sha256":"78eb6f8af71aeb0f30531c0c94087b9b3189e092b1755a8a8e1a0c7df4e7ff49","source":{"kind":"arxiv","id":"2105.13021","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.13021","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"arxiv_version","alias_value":"2105.13021v1","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.13021","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"pith_short_12","alias_value":"PDVW7CXXDLVQ","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"pith_short_16","alias_value":"PDVW7CXXDLVQ6MCT","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"pith_short_8","alias_value":"PDVW7CXX","created_at":"2026-07-05T02:43:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:PDVW7CXXDLVQ6MCTDQGJICD3TM","target":"record","payload":{"canonical_record":{"source":{"id":"2105.13021","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-05-27T09:25:49Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"8ab3dc27f8a169a12d7b8467bac6abd6e0a5ead09682bfc8bda282488e9d12ef","abstract_canon_sha256":"ddf30e94c0b93aee6f5df9757ef77a7b3699846afe3e7f41deb6fa1b85e85868"},"schema_version":"1.0"},"canonical_sha256":"78eb6f8af71aeb0f30531c0c94087b9b3189e092b1755a8a8e1a0c7df4e7ff49","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:43:56.547284Z","signature_b64":"KYRl10gaLBrYrktdnKUgZM2eEeRvXoTzrMG+zICdF09dyM2MNIaaFv/0X0eFm2fe2Hmp3OoujDfjc40NX3gJCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78eb6f8af71aeb0f30531c0c94087b9b3189e092b1755a8a8e1a0c7df4e7ff49","last_reissued_at":"2026-07-05T02:43:56.546843Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:43:56.546843Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.13021","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":"2026-07-05T02:43:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pMXBp2DfEOwe4lqULck+sTmx1cTLjt2/deR8hrDRlJBN2bmE4wf2IJ3R+GIG5Yq7fQEQ3Qd9f4R4jY7FfZBPCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:51:04.884300Z"},"content_sha256":"a9e5ffcb236720b49b06dca12f2d8c7bbe836336acc9adaa139cfd6c35048250","schema_version":"1.0","event_id":"sha256:a9e5ffcb236720b49b06dca12f2d8c7bbe836336acc9adaa139cfd6c35048250"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:PDVW7CXXDLVQ6MCTDQGJICD3TM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two New Zero-Dimensional Qubit Codes from Bordered Metacirculant Construction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Martianus Frederic Ezerman, Padmapani Seneviratne","submitted_at":"2021-05-27T09:25:49Z","abstract_excerpt":"We construct qubit stabilizer codes with parameters $[[81, 0, 20]]$ and $[[94, 0, 22]]$ for the first time. We use symplectic self-dual additive codes over $\\mathbb{F}_4$ built by modifying the adjacency matrices of suitable metacirculant graphs found by a randomized search procedure."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.13021","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/2105.13021/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":"2026-07-05T02:43:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YOI2MyXbsSZ96NPMAEcPHWGVCH9oPZzXBJyHt+6qjV9CfCScPBKWw9n30Rv6oO/TDg9l7bjOa95B9oIUTH6MBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:51:04.884825Z"},"content_sha256":"262bf9d2f64e53e6066103c6760ab7b214beb1080da66444f5821cbbe81cd11e","schema_version":"1.0","event_id":"sha256:262bf9d2f64e53e6066103c6760ab7b214beb1080da66444f5821cbbe81cd11e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PDVW7CXXDLVQ6MCTDQGJICD3TM/bundle.json","state_url":"https://pith.science/pith/PDVW7CXXDLVQ6MCTDQGJICD3TM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PDVW7CXXDLVQ6MCTDQGJICD3TM/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":"2026-08-03T19:51:04Z","links":{"resolver":"https://pith.science/pith/PDVW7CXXDLVQ6MCTDQGJICD3TM","bundle":"https://pith.science/pith/PDVW7CXXDLVQ6MCTDQGJICD3TM/bundle.json","state":"https://pith.science/pith/PDVW7CXXDLVQ6MCTDQGJICD3TM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PDVW7CXXDLVQ6MCTDQGJICD3TM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:PDVW7CXXDLVQ6MCTDQGJICD3TM","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":"ddf30e94c0b93aee6f5df9757ef77a7b3699846afe3e7f41deb6fa1b85e85868","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-05-27T09:25:49Z","title_canon_sha256":"8ab3dc27f8a169a12d7b8467bac6abd6e0a5ead09682bfc8bda282488e9d12ef"},"schema_version":"1.0","source":{"id":"2105.13021","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.13021","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"arxiv_version","alias_value":"2105.13021v1","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.13021","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"pith_short_12","alias_value":"PDVW7CXXDLVQ","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"pith_short_16","alias_value":"PDVW7CXXDLVQ6MCT","created_at":"2026-07-05T02:43:56Z"},{"alias_kind":"pith_short_8","alias_value":"PDVW7CXX","created_at":"2026-07-05T02:43:56Z"}],"graph_snapshots":[{"event_id":"sha256:262bf9d2f64e53e6066103c6760ab7b214beb1080da66444f5821cbbe81cd11e","target":"graph","created_at":"2026-07-05T02:43:56Z","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/2105.13021/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We construct qubit stabilizer codes with parameters $[[81, 0, 20]]$ and $[[94, 0, 22]]$ for the first time. We use symplectic self-dual additive codes over $\\mathbb{F}_4$ built by modifying the adjacency matrices of suitable metacirculant graphs found by a randomized search procedure.","authors_text":"Martianus Frederic Ezerman, Padmapani Seneviratne","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-05-27T09:25:49Z","title":"Two New Zero-Dimensional Qubit Codes from Bordered Metacirculant Construction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.13021","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:a9e5ffcb236720b49b06dca12f2d8c7bbe836336acc9adaa139cfd6c35048250","target":"record","created_at":"2026-07-05T02:43:56Z","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":"ddf30e94c0b93aee6f5df9757ef77a7b3699846afe3e7f41deb6fa1b85e85868","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-05-27T09:25:49Z","title_canon_sha256":"8ab3dc27f8a169a12d7b8467bac6abd6e0a5ead09682bfc8bda282488e9d12ef"},"schema_version":"1.0","source":{"id":"2105.13021","kind":"arxiv","version":1}},"canonical_sha256":"78eb6f8af71aeb0f30531c0c94087b9b3189e092b1755a8a8e1a0c7df4e7ff49","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"78eb6f8af71aeb0f30531c0c94087b9b3189e092b1755a8a8e1a0c7df4e7ff49","first_computed_at":"2026-07-05T02:43:56.546843Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:43:56.546843Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KYRl10gaLBrYrktdnKUgZM2eEeRvXoTzrMG+zICdF09dyM2MNIaaFv/0X0eFm2fe2Hmp3OoujDfjc40NX3gJCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:43:56.547284Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.13021","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9e5ffcb236720b49b06dca12f2d8c7bbe836336acc9adaa139cfd6c35048250","sha256:262bf9d2f64e53e6066103c6760ab7b214beb1080da66444f5821cbbe81cd11e"],"state_sha256":"cafdb46c4a64dbf4bb6a420d4e309781fea3da36f2feac90f1a84221ed932be0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l15S/RiIxGKUzGbS7g5bLk4sYuOFL6da7bOm6cZyo7WUF3KJ35QHQePoq6HtdC7P7ohIyvR++XcirddJoS6oBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T19:51:04.890383Z","bundle_sha256":"68c7b344150e94f5582345108d77645d0e8d7ce01bf39b67a3248728f063c395"}}