{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:OJY3L7LJRXOHZ2KYFAYPQXM6YT","short_pith_number":"pith:OJY3L7LJ","canonical_record":{"source":{"id":"1903.04899","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-12T13:32:43Z","cross_cats_sorted":[],"title_canon_sha256":"7e4a1c3e07edd3b65551b28ba88473cf6284848b2b7ea16cc8849e39c740bbd4","abstract_canon_sha256":"31936ac0b05c35f389aade48b445bb9c122cb302458d2b150cbebd1d7c6513a5"},"schema_version":"1.0"},"canonical_sha256":"7271b5fd698ddc7ce9582830f85d9ec4fa2936853d358c5eb3ea7a58ca510250","source":{"kind":"arxiv","id":"1903.04899","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.04899","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"arxiv_version","alias_value":"1903.04899v2","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.04899","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"pith_short_12","alias_value":"OJY3L7LJRXOH","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"pith_short_16","alias_value":"OJY3L7LJRXOHZ2KY","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"pith_short_8","alias_value":"OJY3L7LJ","created_at":"2026-07-05T00:09:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:OJY3L7LJRXOHZ2KYFAYPQXM6YT","target":"record","payload":{"canonical_record":{"source":{"id":"1903.04899","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-12T13:32:43Z","cross_cats_sorted":[],"title_canon_sha256":"7e4a1c3e07edd3b65551b28ba88473cf6284848b2b7ea16cc8849e39c740bbd4","abstract_canon_sha256":"31936ac0b05c35f389aade48b445bb9c122cb302458d2b150cbebd1d7c6513a5"},"schema_version":"1.0"},"canonical_sha256":"7271b5fd698ddc7ce9582830f85d9ec4fa2936853d358c5eb3ea7a58ca510250","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:09:25.124886Z","signature_b64":"GvQs74Ot5JWPpkB0z7zLhtFUkzHFcqn+vMZKxLnvRa68XFHoA2WSXCblZPUXiAXXp8xsysnWcynxdeylNrG7AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7271b5fd698ddc7ce9582830f85d9ec4fa2936853d358c5eb3ea7a58ca510250","last_reissued_at":"2026-07-05T00:09:25.124476Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:09:25.124476Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.04899","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":"2026-07-05T00:09:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jkWSvM56u/1DoOYTi5E2g4IoQ1jkM3H9B0VupiIuT7YUd30WjwtWvAhQy2Agix7M4VJh5iKrwPxK7iv+xUweAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T17:15:08.384932Z"},"content_sha256":"1b42a1962b35191a78e9406f7dfdd0db00f0a0ff69ef14245c24892c2d274fe1","schema_version":"1.0","event_id":"sha256:1b42a1962b35191a78e9406f7dfdd0db00f0a0ff69ef14245c24892c2d274fe1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:OJY3L7LJRXOHZ2KYFAYPQXM6YT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Communication of partial ignorance with qubits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Oskari Kerppo, Teiko Heinosaari","submitted_at":"2019-03-12T13:32:43Z","abstract_excerpt":"We introduce a class of communication tests where the task is to communicate partial ignorance by means of a physical system. We present a full characterization of the implementations of these tests in the qubit case and partial results for qudits. A peculiar observation is that two physical systems with the same operational dimensions may differ with respect to implementations of these tasks, as is shown to be the case for the qubit and rebit. Finally, we consider the natural question whether some of the communication tests are more difficult than others. A new preordering that we call the ul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.04899","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/1903.04899/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":"2026-07-05T00:09:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O77TyZf0hHGXssGGMziPQA6IXPlsDjerBX2sE3a6C+RzHjl9r0fGo2evnjCSBmEN2piJzb70NCnvnRxQIrBJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T17:15:08.385475Z"},"content_sha256":"3b9ead5969d951cb93de71057626b668378e69db1c3d4dd011562198db31aeed","schema_version":"1.0","event_id":"sha256:3b9ead5969d951cb93de71057626b668378e69db1c3d4dd011562198db31aeed"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OJY3L7LJRXOHZ2KYFAYPQXM6YT/bundle.json","state_url":"https://pith.science/pith/OJY3L7LJRXOHZ2KYFAYPQXM6YT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OJY3L7LJRXOHZ2KYFAYPQXM6YT/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":"2026-08-23T17:15:08Z","links":{"resolver":"https://pith.science/pith/OJY3L7LJRXOHZ2KYFAYPQXM6YT","bundle":"https://pith.science/pith/OJY3L7LJRXOHZ2KYFAYPQXM6YT/bundle.json","state":"https://pith.science/pith/OJY3L7LJRXOHZ2KYFAYPQXM6YT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OJY3L7LJRXOHZ2KYFAYPQXM6YT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OJY3L7LJRXOHZ2KYFAYPQXM6YT","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":"31936ac0b05c35f389aade48b445bb9c122cb302458d2b150cbebd1d7c6513a5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-12T13:32:43Z","title_canon_sha256":"7e4a1c3e07edd3b65551b28ba88473cf6284848b2b7ea16cc8849e39c740bbd4"},"schema_version":"1.0","source":{"id":"1903.04899","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.04899","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"arxiv_version","alias_value":"1903.04899v2","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.04899","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"pith_short_12","alias_value":"OJY3L7LJRXOH","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"pith_short_16","alias_value":"OJY3L7LJRXOHZ2KY","created_at":"2026-07-05T00:09:25Z"},{"alias_kind":"pith_short_8","alias_value":"OJY3L7LJ","created_at":"2026-07-05T00:09:25Z"}],"graph_snapshots":[{"event_id":"sha256:3b9ead5969d951cb93de71057626b668378e69db1c3d4dd011562198db31aeed","target":"graph","created_at":"2026-07-05T00:09:25Z","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/1903.04899/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce a class of communication tests where the task is to communicate partial ignorance by means of a physical system. We present a full characterization of the implementations of these tests in the qubit case and partial results for qudits. A peculiar observation is that two physical systems with the same operational dimensions may differ with respect to implementations of these tasks, as is shown to be the case for the qubit and rebit. Finally, we consider the natural question whether some of the communication tests are more difficult than others. A new preordering that we call the ul","authors_text":"Oskari Kerppo, Teiko Heinosaari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-12T13:32:43Z","title":"Communication of partial ignorance with qubits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.04899","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":"sha256:1b42a1962b35191a78e9406f7dfdd0db00f0a0ff69ef14245c24892c2d274fe1","target":"record","created_at":"2026-07-05T00:09:25Z","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":"31936ac0b05c35f389aade48b445bb9c122cb302458d2b150cbebd1d7c6513a5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-03-12T13:32:43Z","title_canon_sha256":"7e4a1c3e07edd3b65551b28ba88473cf6284848b2b7ea16cc8849e39c740bbd4"},"schema_version":"1.0","source":{"id":"1903.04899","kind":"arxiv","version":2}},"canonical_sha256":"7271b5fd698ddc7ce9582830f85d9ec4fa2936853d358c5eb3ea7a58ca510250","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7271b5fd698ddc7ce9582830f85d9ec4fa2936853d358c5eb3ea7a58ca510250","first_computed_at":"2026-07-05T00:09:25.124476Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:09:25.124476Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GvQs74Ot5JWPpkB0z7zLhtFUkzHFcqn+vMZKxLnvRa68XFHoA2WSXCblZPUXiAXXp8xsysnWcynxdeylNrG7AQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:09:25.124886Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.04899","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b42a1962b35191a78e9406f7dfdd0db00f0a0ff69ef14245c24892c2d274fe1","sha256:3b9ead5969d951cb93de71057626b668378e69db1c3d4dd011562198db31aeed"],"state_sha256":"727723938b6be7aa8949f0184777904fc80b7444462d74cb76ff72b0849ef79f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SbF8O0zw9hq3ApcBYGpDo/wBPCxfTxyXkKgm7gVr2TOvoKO6vfhah8unooXjkZgEDgm/LZOg8JXbvutMHHRcBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T17:15:08.390335Z","bundle_sha256":"4afc3d94910c3ffc3ab4561c43afa1f04655dc80ed3456c7d5b169bb8c436e15"}}