{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:6J3O4IQA5OYLYDTKKGWBVLIM3C","short_pith_number":"pith:6J3O4IQA","canonical_record":{"source":{"id":"2602.13990","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-02-15T04:59:48Z","cross_cats_sorted":[],"title_canon_sha256":"2fd710ca61127a34a556a02334b4023e46ed800d5fd871604711aa53fdfeb837","abstract_canon_sha256":"4a2931080077e8a1693e24b6a291fe42c4384ef3e8d9a9bec5f77c50c40acc69"},"schema_version":"1.0"},"canonical_sha256":"f276ee2200ebb0bc0e6a51ac1aad0cd88081210cb88d356bfedf912192dbdc45","source":{"kind":"arxiv","id":"2602.13990","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.13990","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"arxiv_version","alias_value":"2602.13990v2","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.13990","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"pith_short_12","alias_value":"6J3O4IQA5OYL","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"pith_short_16","alias_value":"6J3O4IQA5OYLYDTK","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"pith_short_8","alias_value":"6J3O4IQA","created_at":"2026-08-12T01:21:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:6J3O4IQA5OYLYDTKKGWBVLIM3C","target":"record","payload":{"canonical_record":{"source":{"id":"2602.13990","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-02-15T04:59:48Z","cross_cats_sorted":[],"title_canon_sha256":"2fd710ca61127a34a556a02334b4023e46ed800d5fd871604711aa53fdfeb837","abstract_canon_sha256":"4a2931080077e8a1693e24b6a291fe42c4384ef3e8d9a9bec5f77c50c40acc69"},"schema_version":"1.0"},"canonical_sha256":"f276ee2200ebb0bc0e6a51ac1aad0cd88081210cb88d356bfedf912192dbdc45","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-12T01:21:33.444118Z","signature_b64":"iNaPvqpCsCztxhEkw0f8G3ByD6Hdlmy0qSbNKAvmdP2zyU1gigQp4Tz6OLaBFlvz6NtfrUJbLEZFhMDym32fDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f276ee2200ebb0bc0e6a51ac1aad0cd88081210cb88d356bfedf912192dbdc45","last_reissued_at":"2026-08-12T01:21:33.442438Z","signature_status":"signed_v1","first_computed_at":"2026-08-12T01:21:33.442438Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2602.13990","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":"2026-08-12T01:21:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4CG2Cs3KtJloxebHNCMWcZwZ48J0NrrxD7iOTwzk5N9D3uMykaDD3ZI1vExCL5ftUPx1YVCx0iAGWbEzUyyDBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T01:04:30.565776Z"},"content_sha256":"c3702857d046827c6cc1b3c726e23ae4554591e3b9e4c5c0d64700e8f1b1afe1","schema_version":"1.0","event_id":"sha256:c3702857d046827c6cc1b3c726e23ae4554591e3b9e4c5c0d64700e8f1b1afe1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:6J3O4IQA5OYLYDTKKGWBVLIM3C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phase-sensitive framed-ribbon representation of single-qubit Pauli measurements in linear cluster states","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Sougata Bhattacharyya, Sovik Roy","submitted_at":"2026-02-15T04:59:48Z","abstract_excerpt":"We provide a geometric classification of single-qubit projective measurements on one-dimensional linear cluster states within a topological framework. Establishing an explicit correspondence between local measurements and surgery operations on an associated link model, we represent the cluster state as a linear Hopf chain. Computational-basis (Z) measurements act as topological severance for bulk qubits and boundary pruning for end qubits. Transverse-basis (X) measurements remove the measured qubit and stratify the remaining state into a superposition of two disjoint but classically correlated"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.13990","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/2602.13990/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":"2026-08-12T01:21:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EIr+M5AHk5nPLnCFPY2GkwbkBIhubSpEwwm97ASo7+GdeGXmkNPywR9fjPERT08MGC0qpG72pQYW/hBClj0PDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T01:04:30.566278Z"},"content_sha256":"f659f2d43ecbad290490231d3c11d146ce684e47c03d07a19cc4b385d99958cc","schema_version":"1.0","event_id":"sha256:f659f2d43ecbad290490231d3c11d146ce684e47c03d07a19cc4b385d99958cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6J3O4IQA5OYLYDTKKGWBVLIM3C/bundle.json","state_url":"https://pith.science/pith/6J3O4IQA5OYLYDTKKGWBVLIM3C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6J3O4IQA5OYLYDTKKGWBVLIM3C/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":"2026-08-13T01:04:30Z","links":{"resolver":"https://pith.science/pith/6J3O4IQA5OYLYDTKKGWBVLIM3C","bundle":"https://pith.science/pith/6J3O4IQA5OYLYDTKKGWBVLIM3C/bundle.json","state":"https://pith.science/pith/6J3O4IQA5OYLYDTKKGWBVLIM3C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6J3O4IQA5OYLYDTKKGWBVLIM3C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:6J3O4IQA5OYLYDTKKGWBVLIM3C","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":"4a2931080077e8a1693e24b6a291fe42c4384ef3e8d9a9bec5f77c50c40acc69","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-02-15T04:59:48Z","title_canon_sha256":"2fd710ca61127a34a556a02334b4023e46ed800d5fd871604711aa53fdfeb837"},"schema_version":"1.0","source":{"id":"2602.13990","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.13990","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"arxiv_version","alias_value":"2602.13990v2","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.13990","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"pith_short_12","alias_value":"6J3O4IQA5OYL","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"pith_short_16","alias_value":"6J3O4IQA5OYLYDTK","created_at":"2026-08-12T01:21:33Z"},{"alias_kind":"pith_short_8","alias_value":"6J3O4IQA","created_at":"2026-08-12T01:21:33Z"}],"graph_snapshots":[{"event_id":"sha256:f659f2d43ecbad290490231d3c11d146ce684e47c03d07a19cc4b385d99958cc","target":"graph","created_at":"2026-08-12T01:21:33Z","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/2602.13990/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We provide a geometric classification of single-qubit projective measurements on one-dimensional linear cluster states within a topological framework. Establishing an explicit correspondence between local measurements and surgery operations on an associated link model, we represent the cluster state as a linear Hopf chain. Computational-basis (Z) measurements act as topological severance for bulk qubits and boundary pruning for end qubits. Transverse-basis (X) measurements remove the measured qubit and stratify the remaining state into a superposition of two disjoint but classically correlated","authors_text":"Sougata Bhattacharyya, Sovik Roy","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-02-15T04:59:48Z","title":"Phase-sensitive framed-ribbon representation of single-qubit Pauli measurements in linear cluster states"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.13990","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:c3702857d046827c6cc1b3c726e23ae4554591e3b9e4c5c0d64700e8f1b1afe1","target":"record","created_at":"2026-08-12T01:21:33Z","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":"4a2931080077e8a1693e24b6a291fe42c4384ef3e8d9a9bec5f77c50c40acc69","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-02-15T04:59:48Z","title_canon_sha256":"2fd710ca61127a34a556a02334b4023e46ed800d5fd871604711aa53fdfeb837"},"schema_version":"1.0","source":{"id":"2602.13990","kind":"arxiv","version":2}},"canonical_sha256":"f276ee2200ebb0bc0e6a51ac1aad0cd88081210cb88d356bfedf912192dbdc45","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f276ee2200ebb0bc0e6a51ac1aad0cd88081210cb88d356bfedf912192dbdc45","first_computed_at":"2026-08-12T01:21:33.442438Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-12T01:21:33.442438Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iNaPvqpCsCztxhEkw0f8G3ByD6Hdlmy0qSbNKAvmdP2zyU1gigQp4Tz6OLaBFlvz6NtfrUJbLEZFhMDym32fDw==","signature_status":"signed_v1","signed_at":"2026-08-12T01:21:33.444118Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.13990","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c3702857d046827c6cc1b3c726e23ae4554591e3b9e4c5c0d64700e8f1b1afe1","sha256:f659f2d43ecbad290490231d3c11d146ce684e47c03d07a19cc4b385d99958cc"],"state_sha256":"cb050a409e965cb800c50b10928ebd01d02579894c2fd9546a018de988cb6329"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IbwONkDGUmlxMewh+W9cwLL9dIugFp+sXYXvLmgtJb0PoZJ9JzB5oA22+VdHBWTqCcW7gwKKB0sVY+gVWRETAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T01:04:30.570667Z","bundle_sha256":"8ebf64ec7308ddc7ebcc5df910c1e87ecf1615bba2958d62a5d79812e915badd"}}