{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:F2MJ3IJEZISPILV2KD7ALBDA6B","short_pith_number":"pith:F2MJ3IJE","canonical_record":{"source":{"id":"1306.0467","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-06-03T15:46:55Z","cross_cats_sorted":[],"title_canon_sha256":"bb0026d894636aae0ad2e92ebbae88b5b5ba46276e5484d03f161f686f778146","abstract_canon_sha256":"3a2c297ede132c098fd5af06a229bf1b822652e38085af773274f2dbc2c4a511"},"schema_version":"1.0"},"canonical_sha256":"2e989da124ca24f42eba50fe058460f06b84863c4e8cb5b96203fe4a7b016355","source":{"kind":"arxiv","id":"1306.0467","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0467","created_at":"2026-05-18T03:21:55Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0467v1","created_at":"2026-05-18T03:21:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0467","created_at":"2026-05-18T03:21:55Z"},{"alias_kind":"pith_short_12","alias_value":"F2MJ3IJEZISP","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"F2MJ3IJEZISPILV2","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"F2MJ3IJE","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:F2MJ3IJEZISPILV2KD7ALBDA6B","target":"record","payload":{"canonical_record":{"source":{"id":"1306.0467","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-06-03T15:46:55Z","cross_cats_sorted":[],"title_canon_sha256":"bb0026d894636aae0ad2e92ebbae88b5b5ba46276e5484d03f161f686f778146","abstract_canon_sha256":"3a2c297ede132c098fd5af06a229bf1b822652e38085af773274f2dbc2c4a511"},"schema_version":"1.0"},"canonical_sha256":"2e989da124ca24f42eba50fe058460f06b84863c4e8cb5b96203fe4a7b016355","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:21:55.227047Z","signature_b64":"ST5+MX/XmHANcpkyR4AI/ZttiSZNeyFZN70wJREfhgdzgwotObsKOAOuVcoR759dzYbc0rV0ogQXudXW4xctAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2e989da124ca24f42eba50fe058460f06b84863c4e8cb5b96203fe4a7b016355","last_reissued_at":"2026-05-18T03:21:55.226649Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:21:55.226649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.0467","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":"2026-05-18T03:21:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3LV4+6lO0V0pKa4kxDug1wwrwFDmXDsH4GV8mxJqQHXO/mt1SYxOJGKfylA+oizlWaoBhmBvFlELts/ppyugBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T14:36:10.766682Z"},"content_sha256":"7569e4ed1aa533f5dfafb519124bcd2bec1ff02c85c4c8f78ca1372a5e2f74fb","schema_version":"1.0","event_id":"sha256:7569e4ed1aa533f5dfafb519124bcd2bec1ff02c85c4c8f78ca1372a5e2f74fb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:F2MJ3IJEZISPILV2KD7ALBDA6B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum State Tomography with incomplete data: Maximum Entropy and Variational Quantum Tomography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. T. Ces\\'ario, C. Lavor, D. S. Gon\\c{c}alves, M. A. Gomes-Ruggiero, R. O. Vianna, T. O. Maciel","submitted_at":"2013-06-03T15:46:55Z","abstract_excerpt":"Whenever we do not have an informationally complete set of measurements, the estimate of a quantum state can not be uniquely determined. In this case, among the density matrices compatible with the available data, it is commonly preferred that one which is the most uncommitted with the missing information. This is the purpose of the Maximum Entropy estimation (MaxEnt) and the Variational Quantum Tomography (VQT). Here, we propose a variant of Variational Quantum Tomography and show its relationship with Maximum Entropy methods in quantum tomographies with incomplete set of measurements. We pro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0467","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":""},"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":"2026-05-18T03:21:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PTQ/NjoMwshUfQgt1KoYPukMgWcgmPN3UCaERu32X2goz8KqDYvOist26RQzGD7R7etP3+t9GGJK522elNKKDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T14:36:10.767041Z"},"content_sha256":"c92dedfdb399e82baf7f35a06a8829203b8e37caf6f2a7e878a1a2b7163a5cfe","schema_version":"1.0","event_id":"sha256:c92dedfdb399e82baf7f35a06a8829203b8e37caf6f2a7e878a1a2b7163a5cfe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F2MJ3IJEZISPILV2KD7ALBDA6B/bundle.json","state_url":"https://pith.science/pith/F2MJ3IJEZISPILV2KD7ALBDA6B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F2MJ3IJEZISPILV2KD7ALBDA6B/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":"2026-06-23T14:36:10Z","links":{"resolver":"https://pith.science/pith/F2MJ3IJEZISPILV2KD7ALBDA6B","bundle":"https://pith.science/pith/F2MJ3IJEZISPILV2KD7ALBDA6B/bundle.json","state":"https://pith.science/pith/F2MJ3IJEZISPILV2KD7ALBDA6B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F2MJ3IJEZISPILV2KD7ALBDA6B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:F2MJ3IJEZISPILV2KD7ALBDA6B","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":"3a2c297ede132c098fd5af06a229bf1b822652e38085af773274f2dbc2c4a511","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-06-03T15:46:55Z","title_canon_sha256":"bb0026d894636aae0ad2e92ebbae88b5b5ba46276e5484d03f161f686f778146"},"schema_version":"1.0","source":{"id":"1306.0467","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.0467","created_at":"2026-05-18T03:21:55Z"},{"alias_kind":"arxiv_version","alias_value":"1306.0467v1","created_at":"2026-05-18T03:21:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.0467","created_at":"2026-05-18T03:21:55Z"},{"alias_kind":"pith_short_12","alias_value":"F2MJ3IJEZISP","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"F2MJ3IJEZISPILV2","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"F2MJ3IJE","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:c92dedfdb399e82baf7f35a06a8829203b8e37caf6f2a7e878a1a2b7163a5cfe","target":"graph","created_at":"2026-05-18T03:21:55Z","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":"Whenever we do not have an informationally complete set of measurements, the estimate of a quantum state can not be uniquely determined. In this case, among the density matrices compatible with the available data, it is commonly preferred that one which is the most uncommitted with the missing information. This is the purpose of the Maximum Entropy estimation (MaxEnt) and the Variational Quantum Tomography (VQT). Here, we propose a variant of Variational Quantum Tomography and show its relationship with Maximum Entropy methods in quantum tomographies with incomplete set of measurements. We pro","authors_text":"A. T. Ces\\'ario, C. Lavor, D. S. Gon\\c{c}alves, M. A. Gomes-Ruggiero, R. O. Vianna, T. O. Maciel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-06-03T15:46:55Z","title":"Quantum State Tomography with incomplete data: Maximum Entropy and Variational Quantum Tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.0467","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":"sha256:7569e4ed1aa533f5dfafb519124bcd2bec1ff02c85c4c8f78ca1372a5e2f74fb","target":"record","created_at":"2026-05-18T03:21:55Z","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":"3a2c297ede132c098fd5af06a229bf1b822652e38085af773274f2dbc2c4a511","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-06-03T15:46:55Z","title_canon_sha256":"bb0026d894636aae0ad2e92ebbae88b5b5ba46276e5484d03f161f686f778146"},"schema_version":"1.0","source":{"id":"1306.0467","kind":"arxiv","version":1}},"canonical_sha256":"2e989da124ca24f42eba50fe058460f06b84863c4e8cb5b96203fe4a7b016355","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e989da124ca24f42eba50fe058460f06b84863c4e8cb5b96203fe4a7b016355","first_computed_at":"2026-05-18T03:21:55.226649Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:21:55.226649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ST5+MX/XmHANcpkyR4AI/ZttiSZNeyFZN70wJREfhgdzgwotObsKOAOuVcoR759dzYbc0rV0ogQXudXW4xctAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:21:55.227047Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.0467","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7569e4ed1aa533f5dfafb519124bcd2bec1ff02c85c4c8f78ca1372a5e2f74fb","sha256:c92dedfdb399e82baf7f35a06a8829203b8e37caf6f2a7e878a1a2b7163a5cfe"],"state_sha256":"e2e1663e769cf185f3290a9ee37d3d6aef6d934de2170417cbcde57eccee6f4f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jIKs4fcBQDwSkt/wkjA8sEQ4ViMyKsPtNB47SrBNLURqoo38qXx4m1w/ncgPk3sUvS3T016VC7ogafHLZczSCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T14:36:10.768981Z","bundle_sha256":"3e1a8cdebdc4d5ad651f86b53bb0d66e569193257f585e155947fbd4a17a34d9"}}