{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:WS4D7WBTUOXB3NE65VAPYNHNOC","short_pith_number":"pith:WS4D7WBT","canonical_record":{"source":{"id":"2608.10490","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-08-11T05:04:40Z","cross_cats_sorted":[],"title_canon_sha256":"f7b0a50c2a6a1450f129c56713e488b356ec7a46c8c25fe172b2e31e1a12df35","abstract_canon_sha256":"cd244bc19d6c8bc422e992a2cb835e966dc6788cd81f7922590e51a7b2304e0a"},"schema_version":"1.0"},"canonical_sha256":"b4b83fd833a3ae1db49eed40fc34ed70a9ae0bcc4fdd32c8494dd39c3c0bd32f","source":{"kind":"arxiv","id":"2608.10490","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.10490","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"arxiv_version","alias_value":"2608.10490v1","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.10490","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"pith_short_12","alias_value":"WS4D7WBTUOXB","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"pith_short_16","alias_value":"WS4D7WBTUOXB3NE6","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"pith_short_8","alias_value":"WS4D7WBT","created_at":"2026-08-12T01:22:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:WS4D7WBTUOXB3NE65VAPYNHNOC","target":"record","payload":{"canonical_record":{"source":{"id":"2608.10490","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-08-11T05:04:40Z","cross_cats_sorted":[],"title_canon_sha256":"f7b0a50c2a6a1450f129c56713e488b356ec7a46c8c25fe172b2e31e1a12df35","abstract_canon_sha256":"cd244bc19d6c8bc422e992a2cb835e966dc6788cd81f7922590e51a7b2304e0a"},"schema_version":"1.0"},"canonical_sha256":"b4b83fd833a3ae1db49eed40fc34ed70a9ae0bcc4fdd32c8494dd39c3c0bd32f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-12T01:22:35.620205Z","signature_b64":"ItLHqkpTQPx9L3mOWtFDkjYC7kx+6uRT7RCF4DhDORdE+b2ArQVDLyu6JAvAr5YkjMt9wTCl7rLWqrLBIiN8DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4b83fd833a3ae1db49eed40fc34ed70a9ae0bcc4fdd32c8494dd39c3c0bd32f","last_reissued_at":"2026-08-12T01:22:35.618716Z","signature_status":"signed_v1","first_computed_at":"2026-08-12T01:22:35.618716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.10490","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":"2026-08-12T01:22:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NEJ618cOU426zjYeFG72FVjQKUOCuuZroQCKsh8s69w0xlrREyeLx7i1WlXw6rxrNwryG5ARgRGlL4WmM1ArCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T01:29:36.618542Z"},"content_sha256":"5f23133b4a9fdd72abb52b71b471c79ed10d0b234874fc7c88c7837e62357324","schema_version":"1.0","event_id":"sha256:5f23133b4a9fdd72abb52b71b471c79ed10d0b234874fc7c88c7837e62357324"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:WS4D7WBTUOXB3NE65VAPYNHNOC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Simultaneous Heisenberg-Limited Multiparameter Metrology via Indefinite Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Guihua Zeng, Hang Xu, Jinfeng Zheng, Jingzheng Huang, Tailong Xiao, Xiaoyang Deng, Ze Zheng","submitted_at":"2026-08-11T05:04:40Z","abstract_excerpt":"Quantum metrology achieves Heisenberg-limited precision in single-parameter estimation, but its multiparameter extension is fundamentally constrained by both parameter-encoding and measurement incompatibility. Noncommuting signal generators may cause incompatible parameter-encoding, preventing the quantum Fisher information matrix from simultaneously achieving the Heisenberg scale for all parameters. Due to incompatible optimal measurements, the classical Fisher information matrix represents the practical attainable precision. Here, we introduce a multiparameter metrology framework based on in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.10490","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/2608.10490/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":"2026-08-12T01:22:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PBoTHDxgvLpVv8gZODe54QUE0kQCjrKCHdgzOfjhS5NcEBXaNdkSwTe6t2C+26iH8lTIwI5GlfHDWuKAW7waCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T01:29:36.619061Z"},"content_sha256":"e5cc00acd1f894cbe758e27a9951049074792aa47c94042160be0fada2d52ff4","schema_version":"1.0","event_id":"sha256:e5cc00acd1f894cbe758e27a9951049074792aa47c94042160be0fada2d52ff4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WS4D7WBTUOXB3NE65VAPYNHNOC/bundle.json","state_url":"https://pith.science/pith/WS4D7WBTUOXB3NE65VAPYNHNOC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WS4D7WBTUOXB3NE65VAPYNHNOC/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":"2026-08-16T01:29:36Z","links":{"resolver":"https://pith.science/pith/WS4D7WBTUOXB3NE65VAPYNHNOC","bundle":"https://pith.science/pith/WS4D7WBTUOXB3NE65VAPYNHNOC/bundle.json","state":"https://pith.science/pith/WS4D7WBTUOXB3NE65VAPYNHNOC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WS4D7WBTUOXB3NE65VAPYNHNOC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:WS4D7WBTUOXB3NE65VAPYNHNOC","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":"cd244bc19d6c8bc422e992a2cb835e966dc6788cd81f7922590e51a7b2304e0a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-08-11T05:04:40Z","title_canon_sha256":"f7b0a50c2a6a1450f129c56713e488b356ec7a46c8c25fe172b2e31e1a12df35"},"schema_version":"1.0","source":{"id":"2608.10490","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.10490","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"arxiv_version","alias_value":"2608.10490v1","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.10490","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"pith_short_12","alias_value":"WS4D7WBTUOXB","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"pith_short_16","alias_value":"WS4D7WBTUOXB3NE6","created_at":"2026-08-12T01:22:35Z"},{"alias_kind":"pith_short_8","alias_value":"WS4D7WBT","created_at":"2026-08-12T01:22:35Z"}],"graph_snapshots":[{"event_id":"sha256:e5cc00acd1f894cbe758e27a9951049074792aa47c94042160be0fada2d52ff4","target":"graph","created_at":"2026-08-12T01:22:35Z","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/2608.10490/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum metrology achieves Heisenberg-limited precision in single-parameter estimation, but its multiparameter extension is fundamentally constrained by both parameter-encoding and measurement incompatibility. Noncommuting signal generators may cause incompatible parameter-encoding, preventing the quantum Fisher information matrix from simultaneously achieving the Heisenberg scale for all parameters. Due to incompatible optimal measurements, the classical Fisher information matrix represents the practical attainable precision. Here, we introduce a multiparameter metrology framework based on in","authors_text":"Guihua Zeng, Hang Xu, Jinfeng Zheng, Jingzheng Huang, Tailong Xiao, Xiaoyang Deng, Ze Zheng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-08-11T05:04:40Z","title":"Simultaneous Heisenberg-Limited Multiparameter Metrology via Indefinite Evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.10490","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":"sha256:5f23133b4a9fdd72abb52b71b471c79ed10d0b234874fc7c88c7837e62357324","target":"record","created_at":"2026-08-12T01:22:35Z","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":"cd244bc19d6c8bc422e992a2cb835e966dc6788cd81f7922590e51a7b2304e0a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-08-11T05:04:40Z","title_canon_sha256":"f7b0a50c2a6a1450f129c56713e488b356ec7a46c8c25fe172b2e31e1a12df35"},"schema_version":"1.0","source":{"id":"2608.10490","kind":"arxiv","version":1}},"canonical_sha256":"b4b83fd833a3ae1db49eed40fc34ed70a9ae0bcc4fdd32c8494dd39c3c0bd32f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4b83fd833a3ae1db49eed40fc34ed70a9ae0bcc4fdd32c8494dd39c3c0bd32f","first_computed_at":"2026-08-12T01:22:35.618716Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-12T01:22:35.618716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ItLHqkpTQPx9L3mOWtFDkjYC7kx+6uRT7RCF4DhDORdE+b2ArQVDLyu6JAvAr5YkjMt9wTCl7rLWqrLBIiN8DQ==","signature_status":"signed_v1","signed_at":"2026-08-12T01:22:35.620205Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.10490","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5f23133b4a9fdd72abb52b71b471c79ed10d0b234874fc7c88c7837e62357324","sha256:e5cc00acd1f894cbe758e27a9951049074792aa47c94042160be0fada2d52ff4"],"state_sha256":"6c43d194521adac108fb2e09d570d59b5224dc7a2a5b29f5130d3324982052e3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MDrLk6PMDrSn0o+qqhsEWVdnnLEYQCpRv7vSc8HlvQpZtRosfumyJe1skmfoaSrbfJMIUdZpRsry1UmD7zA3CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T01:29:36.624560Z","bundle_sha256":"5d7ff3cf48008eaf07c7b72679b86ff4096ef42e2cd7ccbdf83acb73ca323e0c"}}