{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:3NZLVGQDXH5PQ4BOEZOT4NCFX7","short_pith_number":"pith:3NZLVGQD","canonical_record":{"source":{"id":"1112.3806","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-12-16T13:14:40Z","cross_cats_sorted":[],"title_canon_sha256":"4e8b1226d465e4d8f06b493d00b8f1993ce9d20f1e849023fbc84f3dd9e0e296","abstract_canon_sha256":"5b71a11839c4315ad1199e1ff14bd5f2b8270859e5d438511367bddef3019cc1"},"schema_version":"1.0"},"canonical_sha256":"db72ba9a03b9faf8702e265d3e3445bfe3f388d64866e2debb77c0f615fd8e38","source":{"kind":"arxiv","id":"1112.3806","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.3806","created_at":"2026-05-18T03:18:49Z"},{"alias_kind":"arxiv_version","alias_value":"1112.3806v2","created_at":"2026-05-18T03:18:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.3806","created_at":"2026-05-18T03:18:49Z"},{"alias_kind":"pith_short_12","alias_value":"3NZLVGQDXH5P","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"3NZLVGQDXH5PQ4BO","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"3NZLVGQD","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:3NZLVGQDXH5PQ4BOEZOT4NCFX7","target":"record","payload":{"canonical_record":{"source":{"id":"1112.3806","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-12-16T13:14:40Z","cross_cats_sorted":[],"title_canon_sha256":"4e8b1226d465e4d8f06b493d00b8f1993ce9d20f1e849023fbc84f3dd9e0e296","abstract_canon_sha256":"5b71a11839c4315ad1199e1ff14bd5f2b8270859e5d438511367bddef3019cc1"},"schema_version":"1.0"},"canonical_sha256":"db72ba9a03b9faf8702e265d3e3445bfe3f388d64866e2debb77c0f615fd8e38","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:18:49.946778Z","signature_b64":"KC5QDElxi+YX1tApTxXxBTSb6kMx7/m24w2pkzbuS9eA6HxnoAgQ92o+Qw0Df47tH3apUWvHjDpX0xy/aeXPAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"db72ba9a03b9faf8702e265d3e3445bfe3f388d64866e2debb77c0f615fd8e38","last_reissued_at":"2026-05-18T03:18:49.946240Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:18:49.946240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1112.3806","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":"2026-05-18T03:18:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"loq2n0NsRvzbv0tUx3Xo0pjJ0Sdv83JsLP5tU2vHgJkOv7yTkT7cgxtdAOUbTkeKpy3h5+0N533xchuHjPJrAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:05:24.949127Z"},"content_sha256":"948bda04d980011676b24556e35ccf6921ab0c332a4a4d3376e66aa7170fcf42","schema_version":"1.0","event_id":"sha256:948bda04d980011676b24556e35ccf6921ab0c332a4a4d3376e66aa7170fcf42"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:3NZLVGQDXH5PQ4BOEZOT4NCFX7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Self-calibrating Tomography for Angular Schmidt Modes in Spontaneous Parametric Down-Conversion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alexander Kalinkin, Denis Ivanov, D.Mogilevtsev, Ivan Bobrov, Sergey P. Kulik, Stanislav Straupe","submitted_at":"2011-12-16T13:14:40Z","abstract_excerpt":"We report an experimental self-calibrating tomography scheme for entanglement characterization in high-dimensional quantum systems using Schmidt decomposition techniques. The self-tomography technique based on maximal likelihood estimation was developed for characterizing non-ideal measurements in Schmidt basis allowing us to infer both Schmidt eigenvalues and detecting efficiencies."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.3806","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":"2026-05-18T03:18:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LoTcGo13iyeluGWZoOvuqBGYbxO17z1BIZaymGistiqeIlzDYvPZwjzkkIdtRqn+Pmx8HE9MtzNeWZUGEWPBDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:05:24.949490Z"},"content_sha256":"436111ff3d74388932ed59bed911265b3d2d1e86f3c3dda8192cfeb1b8f6896c","schema_version":"1.0","event_id":"sha256:436111ff3d74388932ed59bed911265b3d2d1e86f3c3dda8192cfeb1b8f6896c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3NZLVGQDXH5PQ4BOEZOT4NCFX7/bundle.json","state_url":"https://pith.science/pith/3NZLVGQDXH5PQ4BOEZOT4NCFX7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3NZLVGQDXH5PQ4BOEZOT4NCFX7/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":"2026-06-01T16:05:24Z","links":{"resolver":"https://pith.science/pith/3NZLVGQDXH5PQ4BOEZOT4NCFX7","bundle":"https://pith.science/pith/3NZLVGQDXH5PQ4BOEZOT4NCFX7/bundle.json","state":"https://pith.science/pith/3NZLVGQDXH5PQ4BOEZOT4NCFX7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3NZLVGQDXH5PQ4BOEZOT4NCFX7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:3NZLVGQDXH5PQ4BOEZOT4NCFX7","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":"5b71a11839c4315ad1199e1ff14bd5f2b8270859e5d438511367bddef3019cc1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-12-16T13:14:40Z","title_canon_sha256":"4e8b1226d465e4d8f06b493d00b8f1993ce9d20f1e849023fbc84f3dd9e0e296"},"schema_version":"1.0","source":{"id":"1112.3806","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.3806","created_at":"2026-05-18T03:18:49Z"},{"alias_kind":"arxiv_version","alias_value":"1112.3806v2","created_at":"2026-05-18T03:18:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.3806","created_at":"2026-05-18T03:18:49Z"},{"alias_kind":"pith_short_12","alias_value":"3NZLVGQDXH5P","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"3NZLVGQDXH5PQ4BO","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"3NZLVGQD","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:436111ff3d74388932ed59bed911265b3d2d1e86f3c3dda8192cfeb1b8f6896c","target":"graph","created_at":"2026-05-18T03:18:49Z","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":"We report an experimental self-calibrating tomography scheme for entanglement characterization in high-dimensional quantum systems using Schmidt decomposition techniques. The self-tomography technique based on maximal likelihood estimation was developed for characterizing non-ideal measurements in Schmidt basis allowing us to infer both Schmidt eigenvalues and detecting efficiencies.","authors_text":"Alexander Kalinkin, Denis Ivanov, D.Mogilevtsev, Ivan Bobrov, Sergey P. Kulik, Stanislav Straupe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-12-16T13:14:40Z","title":"Self-calibrating Tomography for Angular Schmidt Modes in Spontaneous Parametric Down-Conversion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.3806","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":"sha256:948bda04d980011676b24556e35ccf6921ab0c332a4a4d3376e66aa7170fcf42","target":"record","created_at":"2026-05-18T03:18:49Z","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":"5b71a11839c4315ad1199e1ff14bd5f2b8270859e5d438511367bddef3019cc1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-12-16T13:14:40Z","title_canon_sha256":"4e8b1226d465e4d8f06b493d00b8f1993ce9d20f1e849023fbc84f3dd9e0e296"},"schema_version":"1.0","source":{"id":"1112.3806","kind":"arxiv","version":2}},"canonical_sha256":"db72ba9a03b9faf8702e265d3e3445bfe3f388d64866e2debb77c0f615fd8e38","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"db72ba9a03b9faf8702e265d3e3445bfe3f388d64866e2debb77c0f615fd8e38","first_computed_at":"2026-05-18T03:18:49.946240Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:18:49.946240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KC5QDElxi+YX1tApTxXxBTSb6kMx7/m24w2pkzbuS9eA6HxnoAgQ92o+Qw0Df47tH3apUWvHjDpX0xy/aeXPAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:18:49.946778Z","signed_message":"canonical_sha256_bytes"},"source_id":"1112.3806","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:948bda04d980011676b24556e35ccf6921ab0c332a4a4d3376e66aa7170fcf42","sha256:436111ff3d74388932ed59bed911265b3d2d1e86f3c3dda8192cfeb1b8f6896c"],"state_sha256":"f441870bea2d68e39b7971f782ed0ad176253e57390c5f777bc617c0bfa8016b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QPY3fYPJnMjeqQ2PGRrjJTsL6ShREYEKXq/SKkVPTLXIFqqxvzy4ci1mcZCXgGQR9PgNucLwYlLZOvnXjNjFDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T16:05:24.954481Z","bundle_sha256":"d4c91424889e3a75688da599b3032d910cc52ad05b3e873575018515cf55e0ea"}}