{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:QS7N5IMF7RTFEYJLHPBZFNRPT4","short_pith_number":"pith:QS7N5IMF","canonical_record":{"source":{"id":"1309.2906","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-11T18:09:01Z","cross_cats_sorted":[],"title_canon_sha256":"8a7cf75f07fd9791ce1a411b324e66316539a70749173833de808078c4d48a90","abstract_canon_sha256":"74a65481f2dab02c94c829997544f0239dfbe802b4d140c3c24e35c57d4356ad"},"schema_version":"1.0"},"canonical_sha256":"84bedea185fc6652612b3bc392b62f9f05ea2b5ae3540db244f5a074e06c6884","source":{"kind":"arxiv","id":"1309.2906","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.2906","created_at":"2026-05-18T03:07:13Z"},{"alias_kind":"arxiv_version","alias_value":"1309.2906v2","created_at":"2026-05-18T03:07:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.2906","created_at":"2026-05-18T03:07:13Z"},{"alias_kind":"pith_short_12","alias_value":"QS7N5IMF7RTF","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"QS7N5IMF7RTFEYJL","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"QS7N5IMF","created_at":"2026-05-18T12:27:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:QS7N5IMF7RTFEYJLHPBZFNRPT4","target":"record","payload":{"canonical_record":{"source":{"id":"1309.2906","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-11T18:09:01Z","cross_cats_sorted":[],"title_canon_sha256":"8a7cf75f07fd9791ce1a411b324e66316539a70749173833de808078c4d48a90","abstract_canon_sha256":"74a65481f2dab02c94c829997544f0239dfbe802b4d140c3c24e35c57d4356ad"},"schema_version":"1.0"},"canonical_sha256":"84bedea185fc6652612b3bc392b62f9f05ea2b5ae3540db244f5a074e06c6884","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:07:13.859920Z","signature_b64":"WoQX2PiqRr7obq13f5l9+TayaYl/6Onn6PTKjXPs1SNFccxZ8QCCyZVJBhv82GyPhQaSsa7buv1s4+PGpsptDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84bedea185fc6652612b3bc392b62f9f05ea2b5ae3540db244f5a074e06c6884","last_reissued_at":"2026-05-18T03:07:13.859464Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:07:13.859464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.2906","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":"2026-05-18T03:07:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ds9dIuBM5Lbp7ImTYEw8+E4xt87GN7PfLEQgnLEGkhn09coQEiAWSXZT4mTr9kop2SCi82cF3ysMFKnVHMkNCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:02:38.855793Z"},"content_sha256":"a7569c5a2cb5b6d76703cb7b43fc92f894b4b8fdb20cb3d124560668ece1f43f","schema_version":"1.0","event_id":"sha256:a7569c5a2cb5b6d76703cb7b43fc92f894b4b8fdb20cb3d124560668ece1f43f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:QS7N5IMF7RTFEYJLHPBZFNRPT4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Informationally Incomplete Quantum Tomography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Jaroslav Rehacek, Yong Siah Teo, Zdenek Hradil","submitted_at":"2013-09-11T18:09:01Z","abstract_excerpt":"In quantum-state tomography on sources with quantum degrees of freedom of large Hilbert spaces, inference of quantum states of light for instance, a complete characterization of the quantum states for these sources is often not feasible owing to limited resources. As such, the concepts of informationally incomplete state estimation becomes important. These concepts are ideal for applications to quantum channel/process tomography, which typically requires a much larger number of measurement settings for a full characterization of a quantum channel. Some key aspects of both quantum-state and qua"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.2906","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":""},"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":"2026-05-18T03:07:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"31Gzh/XO3dyVZOXgj+CM3ihXqRUD9lSvBQcJdPqLW3m1t0M8DJA8AyKYE7ffmnVwy0OZJTgRLwBaolWHUBllAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:02:38.856531Z"},"content_sha256":"54a9dcbbdb446156db356cfeef5d8a82fafb84289412fd5bd45982f883bc3274","schema_version":"1.0","event_id":"sha256:54a9dcbbdb446156db356cfeef5d8a82fafb84289412fd5bd45982f883bc3274"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QS7N5IMF7RTFEYJLHPBZFNRPT4/bundle.json","state_url":"https://pith.science/pith/QS7N5IMF7RTFEYJLHPBZFNRPT4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QS7N5IMF7RTFEYJLHPBZFNRPT4/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":"2026-06-09T05:02:38Z","links":{"resolver":"https://pith.science/pith/QS7N5IMF7RTFEYJLHPBZFNRPT4","bundle":"https://pith.science/pith/QS7N5IMF7RTFEYJLHPBZFNRPT4/bundle.json","state":"https://pith.science/pith/QS7N5IMF7RTFEYJLHPBZFNRPT4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QS7N5IMF7RTFEYJLHPBZFNRPT4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:QS7N5IMF7RTFEYJLHPBZFNRPT4","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":"74a65481f2dab02c94c829997544f0239dfbe802b4d140c3c24e35c57d4356ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-11T18:09:01Z","title_canon_sha256":"8a7cf75f07fd9791ce1a411b324e66316539a70749173833de808078c4d48a90"},"schema_version":"1.0","source":{"id":"1309.2906","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.2906","created_at":"2026-05-18T03:07:13Z"},{"alias_kind":"arxiv_version","alias_value":"1309.2906v2","created_at":"2026-05-18T03:07:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.2906","created_at":"2026-05-18T03:07:13Z"},{"alias_kind":"pith_short_12","alias_value":"QS7N5IMF7RTF","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"QS7N5IMF7RTFEYJL","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"QS7N5IMF","created_at":"2026-05-18T12:27:57Z"}],"graph_snapshots":[{"event_id":"sha256:54a9dcbbdb446156db356cfeef5d8a82fafb84289412fd5bd45982f883bc3274","target":"graph","created_at":"2026-05-18T03:07:13Z","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"},"paper":{"abstract_excerpt":"In quantum-state tomography on sources with quantum degrees of freedom of large Hilbert spaces, inference of quantum states of light for instance, a complete characterization of the quantum states for these sources is often not feasible owing to limited resources. As such, the concepts of informationally incomplete state estimation becomes important. These concepts are ideal for applications to quantum channel/process tomography, which typically requires a much larger number of measurement settings for a full characterization of a quantum channel. Some key aspects of both quantum-state and qua","authors_text":"Jaroslav Rehacek, Yong Siah Teo, Zdenek Hradil","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-11T18:09:01Z","title":"Informationally Incomplete Quantum Tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.2906","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:a7569c5a2cb5b6d76703cb7b43fc92f894b4b8fdb20cb3d124560668ece1f43f","target":"record","created_at":"2026-05-18T03:07:13Z","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":"74a65481f2dab02c94c829997544f0239dfbe802b4d140c3c24e35c57d4356ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-09-11T18:09:01Z","title_canon_sha256":"8a7cf75f07fd9791ce1a411b324e66316539a70749173833de808078c4d48a90"},"schema_version":"1.0","source":{"id":"1309.2906","kind":"arxiv","version":2}},"canonical_sha256":"84bedea185fc6652612b3bc392b62f9f05ea2b5ae3540db244f5a074e06c6884","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84bedea185fc6652612b3bc392b62f9f05ea2b5ae3540db244f5a074e06c6884","first_computed_at":"2026-05-18T03:07:13.859464Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:07:13.859464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WoQX2PiqRr7obq13f5l9+TayaYl/6Onn6PTKjXPs1SNFccxZ8QCCyZVJBhv82GyPhQaSsa7buv1s4+PGpsptDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:07:13.859920Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.2906","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a7569c5a2cb5b6d76703cb7b43fc92f894b4b8fdb20cb3d124560668ece1f43f","sha256:54a9dcbbdb446156db356cfeef5d8a82fafb84289412fd5bd45982f883bc3274"],"state_sha256":"ee48f28bee9447b10289fcc7284002389107754069dd19940a8fdac1db6b14c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Or554q5JeNtlM6eR/s5D1OjNa7fjM9oR8hyQv8WZolHQ+kzoyMI6eVjlFFGI0NGbkBRUCEFtpY+CdX1kWPM8DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T05:02:38.860330Z","bundle_sha256":"aeadc7e6fadc59ac5b11870201c833d1367f999c1b89916ec3601cfbc9796a59"}}