{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:USNRPVXKE346U72O7BUOUDNURR","short_pith_number":"pith:USNRPVXK","canonical_record":{"source":{"id":"2411.12952","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-11-20T00:48:56Z","cross_cats_sorted":[],"title_canon_sha256":"d2ddbfd292c44076d913c5ed429c4b3e7841d6d664f7c150869c4f252a698eb3","abstract_canon_sha256":"f8a763d45cd77420d27cc4abe2f2ee6148a2bf8f39193349a19e5c3f84ad831f"},"schema_version":"1.0"},"canonical_sha256":"a49b17d6ea26f9ea7f4ef868ea0db48c564ca7bd9f82e3e3fd75e71656c738b5","source":{"kind":"arxiv","id":"2411.12952","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.12952","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"arxiv_version","alias_value":"2411.12952v2","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.12952","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"pith_short_12","alias_value":"USNRPVXKE346","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"pith_short_16","alias_value":"USNRPVXKE346U72O","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"pith_short_8","alias_value":"USNRPVXK","created_at":"2026-07-05T11:04:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:USNRPVXKE346U72O7BUOUDNURR","target":"record","payload":{"canonical_record":{"source":{"id":"2411.12952","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-11-20T00:48:56Z","cross_cats_sorted":[],"title_canon_sha256":"d2ddbfd292c44076d913c5ed429c4b3e7841d6d664f7c150869c4f252a698eb3","abstract_canon_sha256":"f8a763d45cd77420d27cc4abe2f2ee6148a2bf8f39193349a19e5c3f84ad831f"},"schema_version":"1.0"},"canonical_sha256":"a49b17d6ea26f9ea7f4ef868ea0db48c564ca7bd9f82e3e3fd75e71656c738b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:04:41.854798Z","signature_b64":"LRfYyBUEu/HIHdnIHbzPZxk34Ig3X3TEbGpf2lacLYOzMHxulwNMzyRnlrTD5BZd7wzM1khIcBbaH+3j/bN7Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a49b17d6ea26f9ea7f4ef868ea0db48c564ca7bd9f82e3e3fd75e71656c738b5","last_reissued_at":"2026-07-05T11:04:41.854267Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:04:41.854267Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2411.12952","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:04:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kcAyCYlbNm95kXyQXg2aIKudQILdjSlLebrMnEK2R8nbaUXYCk1EGCwthgi2s6LLwsETc2bxm9KtQ1wZiKXLCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T17:57:00.240438Z"},"content_sha256":"df129c5dbdadc623ba72989a5c86c1b68fe967670d8acfa229af4e07248a6e1d","schema_version":"1.0","event_id":"sha256:df129c5dbdadc623ba72989a5c86c1b68fe967670d8acfa229af4e07248a6e1d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:USNRPVXKE346U72O7BUOUDNURR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimized four-qubit quantum error correcting code for amplitude damping channel","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Liang Jiang, Qian Xu, Xuanhui Mao","submitted_at":"2024-11-20T00:48:56Z","abstract_excerpt":"Quantum error correction (QEC) is essential for reliable quantum information processing. Targeting a particular error channel, both the encoding and the recovery channel can be optimized through a biconvex optimization to give a high-performance, noise-adapted QEC scheme. We solve the biconvex optimization by the technique of alternating semi-definite programming and identify a new four-qubit code for amplitude damping channel, one major noise in superconducting circuits and a good model for spontaneous emission and energy dissipation. We also construct analytical encoding and recovery channel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.12952","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2411.12952/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":"2026-07-05T11:04:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VqqyIazZX3y3h5xgReUcecNjgsxVH916ng5KHFglQ9Raa5N+l86a4QKAyd2NsUUKmMlmwmm8Ff/I2ASOc7owCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T17:57:00.241047Z"},"content_sha256":"39a698cb2bb14441d5753288a0e1f1c5c651cfd838d3c13098cb48b5e50284e0","schema_version":"1.0","event_id":"sha256:39a698cb2bb14441d5753288a0e1f1c5c651cfd838d3c13098cb48b5e50284e0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/USNRPVXKE346U72O7BUOUDNURR/bundle.json","state_url":"https://pith.science/pith/USNRPVXKE346U72O7BUOUDNURR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/USNRPVXKE346U72O7BUOUDNURR/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":"2026-08-14T17:57:00Z","links":{"resolver":"https://pith.science/pith/USNRPVXKE346U72O7BUOUDNURR","bundle":"https://pith.science/pith/USNRPVXKE346U72O7BUOUDNURR/bundle.json","state":"https://pith.science/pith/USNRPVXKE346U72O7BUOUDNURR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/USNRPVXKE346U72O7BUOUDNURR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:USNRPVXKE346U72O7BUOUDNURR","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":"f8a763d45cd77420d27cc4abe2f2ee6148a2bf8f39193349a19e5c3f84ad831f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-11-20T00:48:56Z","title_canon_sha256":"d2ddbfd292c44076d913c5ed429c4b3e7841d6d664f7c150869c4f252a698eb3"},"schema_version":"1.0","source":{"id":"2411.12952","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.12952","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"arxiv_version","alias_value":"2411.12952v2","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.12952","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"pith_short_12","alias_value":"USNRPVXKE346","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"pith_short_16","alias_value":"USNRPVXKE346U72O","created_at":"2026-07-05T11:04:41Z"},{"alias_kind":"pith_short_8","alias_value":"USNRPVXK","created_at":"2026-07-05T11:04:41Z"}],"graph_snapshots":[{"event_id":"sha256:39a698cb2bb14441d5753288a0e1f1c5c651cfd838d3c13098cb48b5e50284e0","target":"graph","created_at":"2026-07-05T11:04:41Z","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/2411.12952/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum error correction (QEC) is essential for reliable quantum information processing. Targeting a particular error channel, both the encoding and the recovery channel can be optimized through a biconvex optimization to give a high-performance, noise-adapted QEC scheme. We solve the biconvex optimization by the technique of alternating semi-definite programming and identify a new four-qubit code for amplitude damping channel, one major noise in superconducting circuits and a good model for spontaneous emission and energy dissipation. We also construct analytical encoding and recovery channel","authors_text":"Liang Jiang, Qian Xu, Xuanhui Mao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-11-20T00:48:56Z","title":"Optimized four-qubit quantum error correcting code for amplitude damping channel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.12952","kind":"arxiv","version":2},"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:df129c5dbdadc623ba72989a5c86c1b68fe967670d8acfa229af4e07248a6e1d","target":"record","created_at":"2026-07-05T11:04:41Z","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":"f8a763d45cd77420d27cc4abe2f2ee6148a2bf8f39193349a19e5c3f84ad831f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2024-11-20T00:48:56Z","title_canon_sha256":"d2ddbfd292c44076d913c5ed429c4b3e7841d6d664f7c150869c4f252a698eb3"},"schema_version":"1.0","source":{"id":"2411.12952","kind":"arxiv","version":2}},"canonical_sha256":"a49b17d6ea26f9ea7f4ef868ea0db48c564ca7bd9f82e3e3fd75e71656c738b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a49b17d6ea26f9ea7f4ef868ea0db48c564ca7bd9f82e3e3fd75e71656c738b5","first_computed_at":"2026-07-05T11:04:41.854267Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:04:41.854267Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LRfYyBUEu/HIHdnIHbzPZxk34Ig3X3TEbGpf2lacLYOzMHxulwNMzyRnlrTD5BZd7wzM1khIcBbaH+3j/bN7Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:04:41.854798Z","signed_message":"canonical_sha256_bytes"},"source_id":"2411.12952","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df129c5dbdadc623ba72989a5c86c1b68fe967670d8acfa229af4e07248a6e1d","sha256:39a698cb2bb14441d5753288a0e1f1c5c651cfd838d3c13098cb48b5e50284e0"],"state_sha256":"e29236db4aa2ffa54b91b2c638f14958dd7f296276f34bfbe3ea3110151bbd34"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e42/yBbcYe+RBDEijkaPl2O8k5hdcMz9Z3hzj+Ce2DcibMIYeWJcP6lD4IufaPDuf/IuoX2Umw2cMiOdQW62Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T17:57:00.246540Z","bundle_sha256":"062608670989058f86146fafc56effa602526f6cc6f6e73b406d034c05f543fa"}}