{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:CQTDQ3F7RUNUK7HHR3DMNIBF5V","short_pith_number":"pith:CQTDQ3F7","canonical_record":{"source":{"id":"2105.13369","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-27T18:00:06Z","cross_cats_sorted":[],"title_canon_sha256":"22aeb117df89d0066390be731e1188a74943352ed3f7b9a904f95b01c43e517f","abstract_canon_sha256":"e5aa4164bbbab5e920fe413dab32f5cbf1cf43277c12286dc2a63d71dd16b0e7"},"schema_version":"1.0"},"canonical_sha256":"1426386cbf8d1b457ce78ec6c6a025ed6e362f06ee3521fbbe64168844271457","source":{"kind":"arxiv","id":"2105.13369","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.13369","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"arxiv_version","alias_value":"2105.13369v3","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.13369","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"pith_short_12","alias_value":"CQTDQ3F7RUNU","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"pith_short_16","alias_value":"CQTDQ3F7RUNUK7HH","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"pith_short_8","alias_value":"CQTDQ3F7","created_at":"2026-07-05T04:22:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:CQTDQ3F7RUNUK7HHR3DMNIBF5V","target":"record","payload":{"canonical_record":{"source":{"id":"2105.13369","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-27T18:00:06Z","cross_cats_sorted":[],"title_canon_sha256":"22aeb117df89d0066390be731e1188a74943352ed3f7b9a904f95b01c43e517f","abstract_canon_sha256":"e5aa4164bbbab5e920fe413dab32f5cbf1cf43277c12286dc2a63d71dd16b0e7"},"schema_version":"1.0"},"canonical_sha256":"1426386cbf8d1b457ce78ec6c6a025ed6e362f06ee3521fbbe64168844271457","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:22:50.917093Z","signature_b64":"FLvjN5wFmo7oXPtZjbuybfrcmeRFO8orzynMqMhDiTiom4zuhXBHL+SivOdSC+9QEFov+NsQLUZqvchYeb3vBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1426386cbf8d1b457ce78ec6c6a025ed6e362f06ee3521fbbe64168844271457","last_reissued_at":"2026-07-05T04:22:50.916565Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:22:50.916565Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.13369","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:22:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fexcky5yFTTnkYTdEcOab4ooR8xy6IAoKKcE09miVDBM/3BPuQeY0np9FCdSbLAVf0c0jrdEEgz6pNSKyjswDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T09:02:59.357416Z"},"content_sha256":"62c80e9ba63cffd721bb727f1b883159ed1cdc3694f6c2e869871702424b852b","schema_version":"1.0","event_id":"sha256:62c80e9ba63cffd721bb727f1b883159ed1cdc3694f6c2e869871702424b852b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:CQTDQ3F7RUNUK7HHR3DMNIBF5V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unitary channel discrimination beyond group structures: Advantages of sequential and indefinite-causal-order strategies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jessica Bavaresco, Marco T\\'ulio Quintino, Mio Murao","submitted_at":"2021-05-27T18:00:06Z","abstract_excerpt":"For minimum-error channel discrimination tasks that involve only unitary channels, we show that sequential strategies may outperform the parallel ones. Additionally, we show that general strategies that involve indefinite causal order are also advantageous for this task. However, for the task of discriminating a uniformly distributed set of unitary channels that forms a group, we show that parallel strategies are, indeed, optimal, even when compared to general strategies. We also show that strategies based on the quantum switch cannot outperform sequential strategies in the discrimination of u"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.13369","kind":"arxiv","version":3},"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/2105.13369/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":"2026-07-05T04:22:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JDJKITxaWpY7N9L9gES2mCq2SB6uwNqaBcqUxA5K58M4FmnEg7qFgzJMHe1tYZr3Y5iAIzVx8889y0UR71NEAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T09:02:59.357925Z"},"content_sha256":"d7f8722a9362208bece5e56f870fdf99eda50fab45e2d56bdbc10b0c729479ac","schema_version":"1.0","event_id":"sha256:d7f8722a9362208bece5e56f870fdf99eda50fab45e2d56bdbc10b0c729479ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CQTDQ3F7RUNUK7HHR3DMNIBF5V/bundle.json","state_url":"https://pith.science/pith/CQTDQ3F7RUNUK7HHR3DMNIBF5V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CQTDQ3F7RUNUK7HHR3DMNIBF5V/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":"2026-08-18T09:02:59Z","links":{"resolver":"https://pith.science/pith/CQTDQ3F7RUNUK7HHR3DMNIBF5V","bundle":"https://pith.science/pith/CQTDQ3F7RUNUK7HHR3DMNIBF5V/bundle.json","state":"https://pith.science/pith/CQTDQ3F7RUNUK7HHR3DMNIBF5V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CQTDQ3F7RUNUK7HHR3DMNIBF5V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:CQTDQ3F7RUNUK7HHR3DMNIBF5V","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":"e5aa4164bbbab5e920fe413dab32f5cbf1cf43277c12286dc2a63d71dd16b0e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-27T18:00:06Z","title_canon_sha256":"22aeb117df89d0066390be731e1188a74943352ed3f7b9a904f95b01c43e517f"},"schema_version":"1.0","source":{"id":"2105.13369","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.13369","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"arxiv_version","alias_value":"2105.13369v3","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.13369","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"pith_short_12","alias_value":"CQTDQ3F7RUNU","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"pith_short_16","alias_value":"CQTDQ3F7RUNUK7HH","created_at":"2026-07-05T04:22:50Z"},{"alias_kind":"pith_short_8","alias_value":"CQTDQ3F7","created_at":"2026-07-05T04:22:50Z"}],"graph_snapshots":[{"event_id":"sha256:d7f8722a9362208bece5e56f870fdf99eda50fab45e2d56bdbc10b0c729479ac","target":"graph","created_at":"2026-07-05T04:22:50Z","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/2105.13369/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"For minimum-error channel discrimination tasks that involve only unitary channels, we show that sequential strategies may outperform the parallel ones. Additionally, we show that general strategies that involve indefinite causal order are also advantageous for this task. However, for the task of discriminating a uniformly distributed set of unitary channels that forms a group, we show that parallel strategies are, indeed, optimal, even when compared to general strategies. We also show that strategies based on the quantum switch cannot outperform sequential strategies in the discrimination of u","authors_text":"Jessica Bavaresco, Marco T\\'ulio Quintino, Mio Murao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-27T18:00:06Z","title":"Unitary channel discrimination beyond group structures: Advantages of sequential and indefinite-causal-order strategies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.13369","kind":"arxiv","version":3},"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":"sha256:62c80e9ba63cffd721bb727f1b883159ed1cdc3694f6c2e869871702424b852b","target":"record","created_at":"2026-07-05T04:22:50Z","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":"e5aa4164bbbab5e920fe413dab32f5cbf1cf43277c12286dc2a63d71dd16b0e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-27T18:00:06Z","title_canon_sha256":"22aeb117df89d0066390be731e1188a74943352ed3f7b9a904f95b01c43e517f"},"schema_version":"1.0","source":{"id":"2105.13369","kind":"arxiv","version":3}},"canonical_sha256":"1426386cbf8d1b457ce78ec6c6a025ed6e362f06ee3521fbbe64168844271457","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1426386cbf8d1b457ce78ec6c6a025ed6e362f06ee3521fbbe64168844271457","first_computed_at":"2026-07-05T04:22:50.916565Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:22:50.916565Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FLvjN5wFmo7oXPtZjbuybfrcmeRFO8orzynMqMhDiTiom4zuhXBHL+SivOdSC+9QEFov+NsQLUZqvchYeb3vBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:22:50.917093Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.13369","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:62c80e9ba63cffd721bb727f1b883159ed1cdc3694f6c2e869871702424b852b","sha256:d7f8722a9362208bece5e56f870fdf99eda50fab45e2d56bdbc10b0c729479ac"],"state_sha256":"7037d6c38df936ac58dfeadd1061d412950749bce8466a114711e2e146afd856"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cqXt6oulaTmAKsT4eiqt53VEP8uFm+ss58OgA/fA4Rl22Te5BWnKFGkUhw6cPb/s8o7wb9R0P073Ceogip8NAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T09:02:59.361826Z","bundle_sha256":"98870cbbd75cf2a8ab8ff4789a84a8e7cc01903cf45354a193db0b49285809a0"}}