{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:QIDSYTVNHM2VRPUZPJJP5BWFLC","short_pith_number":"pith:QIDSYTVN","canonical_record":{"source":{"id":"2608.05518","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-06T01:46:14Z","cross_cats_sorted":[],"title_canon_sha256":"422cc36cad63105af97934036415f46ec7d7ac0f8c44544b5af1cbad045ec3b7","abstract_canon_sha256":"a6c42d161e9271926b76734b57a6633918ec3bd99028fc2c5960b564a38d51b5"},"schema_version":"1.0"},"canonical_sha256":"82072c4ead3b3558be997a52fe86c5588886c6f97d9b09af332588ef77d41088","source":{"kind":"arxiv","id":"2608.05518","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.05518","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"arxiv_version","alias_value":"2608.05518v1","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.05518","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"pith_short_12","alias_value":"QIDSYTVNHM2V","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"pith_short_16","alias_value":"QIDSYTVNHM2VRPUZ","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"pith_short_8","alias_value":"QIDSYTVN","created_at":"2026-08-07T00:48:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:QIDSYTVNHM2VRPUZPJJP5BWFLC","target":"record","payload":{"canonical_record":{"source":{"id":"2608.05518","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-06T01:46:14Z","cross_cats_sorted":[],"title_canon_sha256":"422cc36cad63105af97934036415f46ec7d7ac0f8c44544b5af1cbad045ec3b7","abstract_canon_sha256":"a6c42d161e9271926b76734b57a6633918ec3bd99028fc2c5960b564a38d51b5"},"schema_version":"1.0"},"canonical_sha256":"82072c4ead3b3558be997a52fe86c5588886c6f97d9b09af332588ef77d41088","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-07T00:48:00.709267Z","signature_b64":"UxmXC7ekOEV8eqtqD0v+SXRxEgV63vAHwNn3mAAPOR714+MM0zgU9E8upvFK2MHkATr9t46XJmKlaKnmHO2dAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82072c4ead3b3558be997a52fe86c5588886c6f97d9b09af332588ef77d41088","last_reissued_at":"2026-08-07T00:48:00.707784Z","signature_status":"signed_v1","first_computed_at":"2026-08-07T00:48:00.707784Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.05518","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":"2026-08-07T00:48:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PHUL/e20mvHdZ0Ps6+mtWYe5t06d/L4dWx/r7UOq7lXRMO7HSGX2mGMuZ9na+48iY/VZGV9eA+rCYcx0uLuWBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T13:46:45.565149Z"},"content_sha256":"cb268fff530789121f965cc3dabf6263ac931cc3ab8822589e77d1e253a87ade","schema_version":"1.0","event_id":"sha256:cb268fff530789121f965cc3dabf6263ac931cc3ab8822589e77d1e253a87ade"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:QIDSYTVNHM2VRPUZPJJP5BWFLC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"X-Z Round Scheduling for the Surface Code with Defects under Biased Noise","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Joshua Viszlai, Lakshika Rathi, Margaret Martonosi, Pau Escofet","submitted_at":"2026-08-06T01:46:14Z","abstract_excerpt":"Fault-tolerant Quantum Computing (FTQC) relies on Quantum Error Correction (QEC) codes that encode logical qubits across many physical qubits to detect and correct errors. The surface code is among the most widely studied codes due to its high error threshold, the existence of efficient decoders, and hardware-friendly properties: a planar, two-dimensional layout with nearest-neighbor connectivity. In practice, however, the fabrication of solid-state quantum processors introduces hardware defects, resulting in defective qubits and couplers that must be discarded. Adapting the surface code to th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.05518","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/2608.05518/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":"2026-08-07T00:48:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jhcRruxLBW7YjqUbAoswaalNs4DZN6BXSg63Hgz5ZOO9bzupHNVeOc5ewLQFebJLvbS6FDguICj+DbxCbKXHCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T13:46:45.565711Z"},"content_sha256":"1f0e3b33f95cbef8e6f224af0b036efb240010e278e93f76be8a391deac0b585","schema_version":"1.0","event_id":"sha256:1f0e3b33f95cbef8e6f224af0b036efb240010e278e93f76be8a391deac0b585"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QIDSYTVNHM2VRPUZPJJP5BWFLC/bundle.json","state_url":"https://pith.science/pith/QIDSYTVNHM2VRPUZPJJP5BWFLC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QIDSYTVNHM2VRPUZPJJP5BWFLC/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":"2026-08-13T13:46:45Z","links":{"resolver":"https://pith.science/pith/QIDSYTVNHM2VRPUZPJJP5BWFLC","bundle":"https://pith.science/pith/QIDSYTVNHM2VRPUZPJJP5BWFLC/bundle.json","state":"https://pith.science/pith/QIDSYTVNHM2VRPUZPJJP5BWFLC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QIDSYTVNHM2VRPUZPJJP5BWFLC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:QIDSYTVNHM2VRPUZPJJP5BWFLC","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":"a6c42d161e9271926b76734b57a6633918ec3bd99028fc2c5960b564a38d51b5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-06T01:46:14Z","title_canon_sha256":"422cc36cad63105af97934036415f46ec7d7ac0f8c44544b5af1cbad045ec3b7"},"schema_version":"1.0","source":{"id":"2608.05518","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.05518","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"arxiv_version","alias_value":"2608.05518v1","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.05518","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"pith_short_12","alias_value":"QIDSYTVNHM2V","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"pith_short_16","alias_value":"QIDSYTVNHM2VRPUZ","created_at":"2026-08-07T00:48:00Z"},{"alias_kind":"pith_short_8","alias_value":"QIDSYTVN","created_at":"2026-08-07T00:48:00Z"}],"graph_snapshots":[{"event_id":"sha256:1f0e3b33f95cbef8e6f224af0b036efb240010e278e93f76be8a391deac0b585","target":"graph","created_at":"2026-08-07T00:48:00Z","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/2608.05518/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Fault-tolerant Quantum Computing (FTQC) relies on Quantum Error Correction (QEC) codes that encode logical qubits across many physical qubits to detect and correct errors. The surface code is among the most widely studied codes due to its high error threshold, the existence of efficient decoders, and hardware-friendly properties: a planar, two-dimensional layout with nearest-neighbor connectivity. In practice, however, the fabrication of solid-state quantum processors introduces hardware defects, resulting in defective qubits and couplers that must be discarded. Adapting the surface code to th","authors_text":"Joshua Viszlai, Lakshika Rathi, Margaret Martonosi, Pau Escofet","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-06T01:46:14Z","title":"X-Z Round Scheduling for the Surface Code with Defects under Biased Noise"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.05518","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:cb268fff530789121f965cc3dabf6263ac931cc3ab8822589e77d1e253a87ade","target":"record","created_at":"2026-08-07T00:48:00Z","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":"a6c42d161e9271926b76734b57a6633918ec3bd99028fc2c5960b564a38d51b5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-08-06T01:46:14Z","title_canon_sha256":"422cc36cad63105af97934036415f46ec7d7ac0f8c44544b5af1cbad045ec3b7"},"schema_version":"1.0","source":{"id":"2608.05518","kind":"arxiv","version":1}},"canonical_sha256":"82072c4ead3b3558be997a52fe86c5588886c6f97d9b09af332588ef77d41088","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"82072c4ead3b3558be997a52fe86c5588886c6f97d9b09af332588ef77d41088","first_computed_at":"2026-08-07T00:48:00.707784Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-07T00:48:00.707784Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UxmXC7ekOEV8eqtqD0v+SXRxEgV63vAHwNn3mAAPOR714+MM0zgU9E8upvFK2MHkATr9t46XJmKlaKnmHO2dAA==","signature_status":"signed_v1","signed_at":"2026-08-07T00:48:00.709267Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.05518","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb268fff530789121f965cc3dabf6263ac931cc3ab8822589e77d1e253a87ade","sha256:1f0e3b33f95cbef8e6f224af0b036efb240010e278e93f76be8a391deac0b585"],"state_sha256":"eda5e9724defa67dec5bdec6383877f2559f088de42c44b4385b581c25976e5d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+/bM7/HylG7eVmozDjAjkkBl75owgMssjdk/cOjPYRML8FX1DSI1YibhcFBGmQlR5N6boZCa1fZgleqqkkshAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T13:46:45.570930Z","bundle_sha256":"5df13c5abf24171953a7808904df33eeac1e271c52fac77852ab9296a858ea30"}}