{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:WU4LIOUUHTA5GS3TVXKWKLLJEA","short_pith_number":"pith:WU4LIOUU","canonical_record":{"source":{"id":"2407.11926","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-07-16T17:18:13Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"9daa5ad493712c1223c9836bd808a87dfc0a50e5b2fb34443bc6f19fdff59840","abstract_canon_sha256":"d4ea889e1a4582541512987f9092f33d113d6cc666d384d8dd73d7e6603d28ef"},"schema_version":"1.0"},"canonical_sha256":"b538b43a943cc1d34b73add5652d69200c607978c78aa076c5dd306e13ca9acb","source":{"kind":"arxiv","id":"2407.11926","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.11926","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"arxiv_version","alias_value":"2407.11926v2","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.11926","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"pith_short_12","alias_value":"WU4LIOUUHTA5","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"pith_short_16","alias_value":"WU4LIOUUHTA5GS3T","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"pith_short_8","alias_value":"WU4LIOUU","created_at":"2026-07-05T11:52:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:WU4LIOUUHTA5GS3TVXKWKLLJEA","target":"record","payload":{"canonical_record":{"source":{"id":"2407.11926","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-07-16T17:18:13Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"9daa5ad493712c1223c9836bd808a87dfc0a50e5b2fb34443bc6f19fdff59840","abstract_canon_sha256":"d4ea889e1a4582541512987f9092f33d113d6cc666d384d8dd73d7e6603d28ef"},"schema_version":"1.0"},"canonical_sha256":"b538b43a943cc1d34b73add5652d69200c607978c78aa076c5dd306e13ca9acb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:52:46.262608Z","signature_b64":"F7p7ReWmZBmV98btnSFgPhdaVcFolG5usvv4tGBWrERSqOdg0RBf5tgDNwo/SOkm/uOaFHtMAHsRlxqUv1bnCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b538b43a943cc1d34b73add5652d69200c607978c78aa076c5dd306e13ca9acb","last_reissued_at":"2026-07-05T11:52:46.262094Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:52:46.262094Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.11926","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":"2026-07-05T11:52:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xjs6MnxoyEq5GdXkXXFwMML+qowS3jUcsHYaqsJ9jwmZGWf2uoRLk6aCB++ioS3dl1b5GZyRrtI5A2WiHfMIAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T07:37:54.337568Z"},"content_sha256":"c5878665225d729c224655d4c402fcd3cb8e38eb116279499f34bb93105dd0d8","schema_version":"1.0","event_id":"sha256:c5878665225d729c224655d4c402fcd3cb8e38eb116279499f34bb93105dd0d8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:WU4LIOUUHTA5GS3TVXKWKLLJEA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Far from Perfect: Quantum Error Correction with (Hyperinvariant) Evenbly Codes","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"quant-ph","authors_text":"Alexander Jahn, David Elkouss, Junyu Fan, Matthew Steinberg, Robert J. Harris, Sebastian Feld","submitted_at":"2024-07-16T17:18:13Z","abstract_excerpt":"We introduce a new class of qubit codes that we call Evenbly codes, building on a previous proposal of hyperinvariant tensor networks. Its tensor network description consists of local, non-perfect tensors describing CSS codes interspersed with Hadamard gates, placed on a hyperbolic $\\{p,q\\}$ geometry with even $q\\geq 4$, yielding an infinitely large class of subsystem codes. We construct an example for a $\\{5,4\\}$ manifold and describe strategies of logical gauge fixing that lead to different rates $k/n$ and distances $d$, which we calculate analytically, finding distances which range from $d="},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.11926","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/2407.11926/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":"2026-07-05T11:52:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DpWZM1XC16CX/QEiWA9HUieCyZhZR9uWUaj4TXMOmX/JJjhWXSh4ewIgqTJbW0QiDw53IedBABmBxP0JzeQ6Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T07:37:54.338174Z"},"content_sha256":"7bdf8d99dc4280611b66a96ac34d2c58597156c3bcaaf5eae407c1d0bebe4ea4","schema_version":"1.0","event_id":"sha256:7bdf8d99dc4280611b66a96ac34d2c58597156c3bcaaf5eae407c1d0bebe4ea4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WU4LIOUUHTA5GS3TVXKWKLLJEA/bundle.json","state_url":"https://pith.science/pith/WU4LIOUUHTA5GS3TVXKWKLLJEA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WU4LIOUUHTA5GS3TVXKWKLLJEA/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":"2026-08-05T07:37:54Z","links":{"resolver":"https://pith.science/pith/WU4LIOUUHTA5GS3TVXKWKLLJEA","bundle":"https://pith.science/pith/WU4LIOUUHTA5GS3TVXKWKLLJEA/bundle.json","state":"https://pith.science/pith/WU4LIOUUHTA5GS3TVXKWKLLJEA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WU4LIOUUHTA5GS3TVXKWKLLJEA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:WU4LIOUUHTA5GS3TVXKWKLLJEA","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":"d4ea889e1a4582541512987f9092f33d113d6cc666d384d8dd73d7e6603d28ef","cross_cats_sorted":["hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-07-16T17:18:13Z","title_canon_sha256":"9daa5ad493712c1223c9836bd808a87dfc0a50e5b2fb34443bc6f19fdff59840"},"schema_version":"1.0","source":{"id":"2407.11926","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.11926","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"arxiv_version","alias_value":"2407.11926v2","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.11926","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"pith_short_12","alias_value":"WU4LIOUUHTA5","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"pith_short_16","alias_value":"WU4LIOUUHTA5GS3T","created_at":"2026-07-05T11:52:46Z"},{"alias_kind":"pith_short_8","alias_value":"WU4LIOUU","created_at":"2026-07-05T11:52:46Z"}],"graph_snapshots":[{"event_id":"sha256:7bdf8d99dc4280611b66a96ac34d2c58597156c3bcaaf5eae407c1d0bebe4ea4","target":"graph","created_at":"2026-07-05T11:52:46Z","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/2407.11926/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce a new class of qubit codes that we call Evenbly codes, building on a previous proposal of hyperinvariant tensor networks. Its tensor network description consists of local, non-perfect tensors describing CSS codes interspersed with Hadamard gates, placed on a hyperbolic $\\{p,q\\}$ geometry with even $q\\geq 4$, yielding an infinitely large class of subsystem codes. We construct an example for a $\\{5,4\\}$ manifold and describe strategies of logical gauge fixing that lead to different rates $k/n$ and distances $d$, which we calculate analytically, finding distances which range from $d=","authors_text":"Alexander Jahn, David Elkouss, Junyu Fan, Matthew Steinberg, Robert J. Harris, Sebastian Feld","cross_cats":["hep-th"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-07-16T17:18:13Z","title":"Far from Perfect: Quantum Error Correction with (Hyperinvariant) Evenbly Codes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.11926","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:c5878665225d729c224655d4c402fcd3cb8e38eb116279499f34bb93105dd0d8","target":"record","created_at":"2026-07-05T11:52:46Z","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":"d4ea889e1a4582541512987f9092f33d113d6cc666d384d8dd73d7e6603d28ef","cross_cats_sorted":["hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-07-16T17:18:13Z","title_canon_sha256":"9daa5ad493712c1223c9836bd808a87dfc0a50e5b2fb34443bc6f19fdff59840"},"schema_version":"1.0","source":{"id":"2407.11926","kind":"arxiv","version":2}},"canonical_sha256":"b538b43a943cc1d34b73add5652d69200c607978c78aa076c5dd306e13ca9acb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b538b43a943cc1d34b73add5652d69200c607978c78aa076c5dd306e13ca9acb","first_computed_at":"2026-07-05T11:52:46.262094Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:52:46.262094Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F7p7ReWmZBmV98btnSFgPhdaVcFolG5usvv4tGBWrERSqOdg0RBf5tgDNwo/SOkm/uOaFHtMAHsRlxqUv1bnCg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:52:46.262608Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.11926","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c5878665225d729c224655d4c402fcd3cb8e38eb116279499f34bb93105dd0d8","sha256:7bdf8d99dc4280611b66a96ac34d2c58597156c3bcaaf5eae407c1d0bebe4ea4"],"state_sha256":"6fc67aee40f82e8e31e9c9a63a4435f9fd642b926d54316512d456c33b0816dd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lI6YZwFqlfgl+jcYdhFrUlbrcRW6qT+xCLce5RNkkIzdDViCE+SDc99jgb8oiTrmYW8mg9MVrkitZqzwDeeWDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T07:37:54.341763Z","bundle_sha256":"094470c111ac549291f718f281ed19333d7ecd00b574262f65536646ceda6f13"}}