{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:KLOONTPN4NLAXDCGBZGECNB7MB","short_pith_number":"pith:KLOONTPN","canonical_record":{"source":{"id":"2605.31519","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-05-29T16:36:17Z","cross_cats_sorted":[],"title_canon_sha256":"a37a1fe9012e3614d0a3b254b4bfcd36110b7bc77e1cd893162986206bf885f9","abstract_canon_sha256":"ee17a34239e17f61931516524726fb8af85a13513f10cc1ba54f510a96ff4633"},"schema_version":"1.0"},"canonical_sha256":"52dce6cdede3560b8c460e4c41343f60522e455e43e317b8c477824ee13fd58a","source":{"kind":"arxiv","id":"2605.31519","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.31519","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"arxiv_version","alias_value":"2605.31519v1","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.31519","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"pith_short_12","alias_value":"KLOONTPN4NLA","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"pith_short_16","alias_value":"KLOONTPN4NLAXDCG","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"pith_short_8","alias_value":"KLOONTPN","created_at":"2026-06-01T02:04:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:KLOONTPN4NLAXDCGBZGECNB7MB","target":"record","payload":{"canonical_record":{"source":{"id":"2605.31519","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-05-29T16:36:17Z","cross_cats_sorted":[],"title_canon_sha256":"a37a1fe9012e3614d0a3b254b4bfcd36110b7bc77e1cd893162986206bf885f9","abstract_canon_sha256":"ee17a34239e17f61931516524726fb8af85a13513f10cc1ba54f510a96ff4633"},"schema_version":"1.0"},"canonical_sha256":"52dce6cdede3560b8c460e4c41343f60522e455e43e317b8c477824ee13fd58a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-01T02:04:10.499504Z","signature_b64":"fSi2FZlrZchG9Ociln6026s77peMrYUYYJBDn9M+K7oQ9oxzV25GjXL0LLU0I9y90Se5HPE0RVIeHwQhCKbaCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52dce6cdede3560b8c460e4c41343f60522e455e43e317b8c477824ee13fd58a","last_reissued_at":"2026-06-01T02:04:10.498300Z","signature_status":"signed_v1","first_computed_at":"2026-06-01T02:04:10.498300Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.31519","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":"2026-06-01T02:04:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ra1s4Nm+GgS/Cqcn/qcKpovg1MFIP8qGZQdEXlDaQ1WHAAoRxPF+SiEqJIujSgI6tPlF8N5BLh6AG1lvGyJ/Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T00:06:40.092717Z"},"content_sha256":"a316670eaefcd768ef0fd57bd688e0c1092b2e859598868fb4cbdc50b96f3f31","schema_version":"1.0","event_id":"sha256:a316670eaefcd768ef0fd57bd688e0c1092b2e859598868fb4cbdc50b96f3f31"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:KLOONTPN4NLAXDCGBZGECNB7MB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Entanglement in quantum channel discrimination: sometimes less is more","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Kristin Sundal Lien, Marco T\\'ulio Quintino","submitted_at":"2026-05-29T16:36:17Z","abstract_excerpt":"Entanglement is known to be a powerful resource that improves performance in various quantum information and computational tasks. A standard example of such a phenomenon is the possibility of perfectly discriminating all four Pauli operations in a single shot via the superdense coding protocol. While entanglement is often a powerful resource for quantum channel discrimination, this is not necessarily the case. In this work, we identify scenarios in which the maximally entangled state is a bad choice of input state and, more generally, show that excessive entanglement can reduce channel discrim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.31519","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/2605.31519/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":"2026-06-01T02:04:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eR7vunuycS8Dq7bfTmMOaUK0PrWP6Le+YysL3hiNjGkchSrifo1s+mf6mf4bkSW3AtMl/3bYWZlABEolnCcpBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T00:06:40.093373Z"},"content_sha256":"1fabb55c8df39b7c2f6da7e0fadd3b98c64a99c57eb1a8d879e7c186cd8f43c7","schema_version":"1.0","event_id":"sha256:1fabb55c8df39b7c2f6da7e0fadd3b98c64a99c57eb1a8d879e7c186cd8f43c7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KLOONTPN4NLAXDCGBZGECNB7MB/bundle.json","state_url":"https://pith.science/pith/KLOONTPN4NLAXDCGBZGECNB7MB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KLOONTPN4NLAXDCGBZGECNB7MB/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":"2026-07-02T00:06:40Z","links":{"resolver":"https://pith.science/pith/KLOONTPN4NLAXDCGBZGECNB7MB","bundle":"https://pith.science/pith/KLOONTPN4NLAXDCGBZGECNB7MB/bundle.json","state":"https://pith.science/pith/KLOONTPN4NLAXDCGBZGECNB7MB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KLOONTPN4NLAXDCGBZGECNB7MB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:KLOONTPN4NLAXDCGBZGECNB7MB","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":"ee17a34239e17f61931516524726fb8af85a13513f10cc1ba54f510a96ff4633","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-05-29T16:36:17Z","title_canon_sha256":"a37a1fe9012e3614d0a3b254b4bfcd36110b7bc77e1cd893162986206bf885f9"},"schema_version":"1.0","source":{"id":"2605.31519","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.31519","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"arxiv_version","alias_value":"2605.31519v1","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.31519","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"pith_short_12","alias_value":"KLOONTPN4NLA","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"pith_short_16","alias_value":"KLOONTPN4NLAXDCG","created_at":"2026-06-01T02:04:10Z"},{"alias_kind":"pith_short_8","alias_value":"KLOONTPN","created_at":"2026-06-01T02:04:10Z"}],"graph_snapshots":[{"event_id":"sha256:1fabb55c8df39b7c2f6da7e0fadd3b98c64a99c57eb1a8d879e7c186cd8f43c7","target":"graph","created_at":"2026-06-01T02:04:10Z","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/2605.31519/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Entanglement is known to be a powerful resource that improves performance in various quantum information and computational tasks. A standard example of such a phenomenon is the possibility of perfectly discriminating all four Pauli operations in a single shot via the superdense coding protocol. While entanglement is often a powerful resource for quantum channel discrimination, this is not necessarily the case. In this work, we identify scenarios in which the maximally entangled state is a bad choice of input state and, more generally, show that excessive entanglement can reduce channel discrim","authors_text":"Kristin Sundal Lien, Marco T\\'ulio Quintino","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-05-29T16:36:17Z","title":"Entanglement in quantum channel discrimination: sometimes less is more"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.31519","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:a316670eaefcd768ef0fd57bd688e0c1092b2e859598868fb4cbdc50b96f3f31","target":"record","created_at":"2026-06-01T02:04:10Z","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":"ee17a34239e17f61931516524726fb8af85a13513f10cc1ba54f510a96ff4633","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-05-29T16:36:17Z","title_canon_sha256":"a37a1fe9012e3614d0a3b254b4bfcd36110b7bc77e1cd893162986206bf885f9"},"schema_version":"1.0","source":{"id":"2605.31519","kind":"arxiv","version":1}},"canonical_sha256":"52dce6cdede3560b8c460e4c41343f60522e455e43e317b8c477824ee13fd58a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52dce6cdede3560b8c460e4c41343f60522e455e43e317b8c477824ee13fd58a","first_computed_at":"2026-06-01T02:04:10.498300Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-01T02:04:10.498300Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fSi2FZlrZchG9Ociln6026s77peMrYUYYJBDn9M+K7oQ9oxzV25GjXL0LLU0I9y90Se5HPE0RVIeHwQhCKbaCw==","signature_status":"signed_v1","signed_at":"2026-06-01T02:04:10.499504Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.31519","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a316670eaefcd768ef0fd57bd688e0c1092b2e859598868fb4cbdc50b96f3f31","sha256:1fabb55c8df39b7c2f6da7e0fadd3b98c64a99c57eb1a8d879e7c186cd8f43c7"],"state_sha256":"2dbe62355374318fba0f954aca74a22d6d5cd17a868b4816dec48ed051fe80c7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VhlxYo9+EtvH5gtH2b/Hr+o7KvPOQy4ywlNOcrOn4+Tt7XnWFKqT64TGMjrFKhs0wbeRl6bi13/Z/5ZazeFTBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T00:06:40.096548Z","bundle_sha256":"119ab4fa057b3484e3df85fd9fef20b449f17e08e9c43bdefb419d8eb25ed0a0"}}