{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:KHCIQUE2SLMQNOCYDAB4GLBG4K","short_pith_number":"pith:KHCIQUE2","canonical_record":{"source":{"id":"2607.21169","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-23T10:56:33Z","cross_cats_sorted":[],"title_canon_sha256":"17c39dd19df045406389477657daa4c867d26e480f387c08367aa093daf15215","abstract_canon_sha256":"4295c020070601580ba40b23a64861fcd249d938951c30095bb3ce786030ea92"},"schema_version":"1.0"},"canonical_sha256":"51c488509a92d906b8581803c32c26e2bd51ac226152e69503fad3ce1c691c44","source":{"kind":"arxiv","id":"2607.21169","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.21169","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"arxiv_version","alias_value":"2607.21169v1","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21169","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"pith_short_12","alias_value":"KHCIQUE2SLMQ","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"pith_short_16","alias_value":"KHCIQUE2SLMQNOCY","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"pith_short_8","alias_value":"KHCIQUE2","created_at":"2026-07-24T01:24:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:KHCIQUE2SLMQNOCYDAB4GLBG4K","target":"record","payload":{"canonical_record":{"source":{"id":"2607.21169","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-23T10:56:33Z","cross_cats_sorted":[],"title_canon_sha256":"17c39dd19df045406389477657daa4c867d26e480f387c08367aa093daf15215","abstract_canon_sha256":"4295c020070601580ba40b23a64861fcd249d938951c30095bb3ce786030ea92"},"schema_version":"1.0"},"canonical_sha256":"51c488509a92d906b8581803c32c26e2bd51ac226152e69503fad3ce1c691c44","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-24T01:24:17.123743Z","signature_b64":"8/ymWtPdjGJEUBw2CTnWVBR59JVtNAEC8o1/zx69s++bUIkgAHkOWKZmfX4Qmi/cELcIf10Ha5Juye0HrZFRCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51c488509a92d906b8581803c32c26e2bd51ac226152e69503fad3ce1c691c44","last_reissued_at":"2026-07-24T01:24:17.122751Z","signature_status":"signed_v1","first_computed_at":"2026-07-24T01:24:17.122751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.21169","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":"2026-07-24T01:24:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tLLN4SpR6EoKO4I6gh2jNQdmQ0gqGiL4/s7QZXpAogBGRjur7S3ytKsCwkP8rQ5RUf/Qp55My2b0K2wj3u+sAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T22:02:00.322580Z"},"content_sha256":"5bd0a692a5065903a2e4f26617e16044a5b224306c2c01e6584e0fd609cd0856","schema_version":"1.0","event_id":"sha256:5bd0a692a5065903a2e4f26617e16044a5b224306c2c01e6584e0fd609cd0856"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:KHCIQUE2SLMQNOCYDAB4GLBG4K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Characterising extremal decoherence by quantum measurement incompatibility","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Daniel McNulty, Jukka Kiukas, William Townsend","submitted_at":"2026-07-23T10:56:33Z","abstract_excerpt":"Decoherence, when viewed in the Heisenberg picture, can turn incompatible measurements into jointly measurable ones. This provides an observable-level description of emergent classicality in terms of the incompatibility destroyed by a noise channel. The corresponding loss of incompatibility can be captured by the channel's \\emph{compatibility region}---the observables in a probe class that become jointly measurable with every noisy observable. The geometry and volume of this region provide a refined operational way to compare noise channels. We apply this framework to decoherence channels, eac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21169","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/2607.21169/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":"2026-07-24T01:24:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0kMjbOLb0ybRQIKWNKOp76BSEhKtZ/m1Nlroqk1wEZ8pSFfg3nvh9YmSAab3IFzZ2U6aT0Z2FwJwJY+P/d4fBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T22:02:00.323258Z"},"content_sha256":"dc3e6e8632b2ea9383b1992e3b2158a2c664fdefb574db5d3dc02eaf82b54882","schema_version":"1.0","event_id":"sha256:dc3e6e8632b2ea9383b1992e3b2158a2c664fdefb574db5d3dc02eaf82b54882"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KHCIQUE2SLMQNOCYDAB4GLBG4K/bundle.json","state_url":"https://pith.science/pith/KHCIQUE2SLMQNOCYDAB4GLBG4K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KHCIQUE2SLMQNOCYDAB4GLBG4K/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":"2026-08-16T22:02:00Z","links":{"resolver":"https://pith.science/pith/KHCIQUE2SLMQNOCYDAB4GLBG4K","bundle":"https://pith.science/pith/KHCIQUE2SLMQNOCYDAB4GLBG4K/bundle.json","state":"https://pith.science/pith/KHCIQUE2SLMQNOCYDAB4GLBG4K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KHCIQUE2SLMQNOCYDAB4GLBG4K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:KHCIQUE2SLMQNOCYDAB4GLBG4K","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":"4295c020070601580ba40b23a64861fcd249d938951c30095bb3ce786030ea92","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-23T10:56:33Z","title_canon_sha256":"17c39dd19df045406389477657daa4c867d26e480f387c08367aa093daf15215"},"schema_version":"1.0","source":{"id":"2607.21169","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.21169","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"arxiv_version","alias_value":"2607.21169v1","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21169","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"pith_short_12","alias_value":"KHCIQUE2SLMQ","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"pith_short_16","alias_value":"KHCIQUE2SLMQNOCY","created_at":"2026-07-24T01:24:17Z"},{"alias_kind":"pith_short_8","alias_value":"KHCIQUE2","created_at":"2026-07-24T01:24:17Z"}],"graph_snapshots":[{"event_id":"sha256:dc3e6e8632b2ea9383b1992e3b2158a2c664fdefb574db5d3dc02eaf82b54882","target":"graph","created_at":"2026-07-24T01:24:17Z","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/2607.21169/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Decoherence, when viewed in the Heisenberg picture, can turn incompatible measurements into jointly measurable ones. This provides an observable-level description of emergent classicality in terms of the incompatibility destroyed by a noise channel. The corresponding loss of incompatibility can be captured by the channel's \\emph{compatibility region}---the observables in a probe class that become jointly measurable with every noisy observable. The geometry and volume of this region provide a refined operational way to compare noise channels. We apply this framework to decoherence channels, eac","authors_text":"Daniel McNulty, Jukka Kiukas, William Townsend","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-23T10:56:33Z","title":"Characterising extremal decoherence by quantum measurement incompatibility"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21169","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":"sha256:5bd0a692a5065903a2e4f26617e16044a5b224306c2c01e6584e0fd609cd0856","target":"record","created_at":"2026-07-24T01:24:17Z","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":"4295c020070601580ba40b23a64861fcd249d938951c30095bb3ce786030ea92","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-07-23T10:56:33Z","title_canon_sha256":"17c39dd19df045406389477657daa4c867d26e480f387c08367aa093daf15215"},"schema_version":"1.0","source":{"id":"2607.21169","kind":"arxiv","version":1}},"canonical_sha256":"51c488509a92d906b8581803c32c26e2bd51ac226152e69503fad3ce1c691c44","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"51c488509a92d906b8581803c32c26e2bd51ac226152e69503fad3ce1c691c44","first_computed_at":"2026-07-24T01:24:17.122751Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-24T01:24:17.122751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8/ymWtPdjGJEUBw2CTnWVBR59JVtNAEC8o1/zx69s++bUIkgAHkOWKZmfX4Qmi/cELcIf10Ha5Juye0HrZFRCQ==","signature_status":"signed_v1","signed_at":"2026-07-24T01:24:17.123743Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.21169","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bd0a692a5065903a2e4f26617e16044a5b224306c2c01e6584e0fd609cd0856","sha256:dc3e6e8632b2ea9383b1992e3b2158a2c664fdefb574db5d3dc02eaf82b54882"],"state_sha256":"42bf09114f7a9f20d70712115209c148f0970a8bd9157c74a64a4784d851c1fd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cXx/4E/THLVY07ZXq7TA8nQwIsrvMbpBjSHxEYIwaDQhdF+ICYiGyFNFBtImDVdA3cAiKDFNXtm8UZJT3LmADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T22:02:00.328025Z","bundle_sha256":"85dadaf5cb7039a816d1a1840201d6c26c34d9765927502de779b46186fed692"}}