{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:PCT4RNZDZ6IWQANL32ELNIXIKG","short_pith_number":"pith:PCT4RNZD","canonical_record":{"source":{"id":"2111.03132","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-11-04T19:56:21Z","cross_cats_sorted":["cs.ET"],"title_canon_sha256":"d0ea25bd2d4371d6dc6047258cba2f1663110aad6cb6c4bfe6282cd2ae0c0bcd","abstract_canon_sha256":"2862fe9c2a20ed3c32487d1fa74a7bfa163388c7c9656ba257b82c95635fafa1"},"schema_version":"1.0"},"canonical_sha256":"78a7c8b723cf916801abde88b6a2e85192cc8f78f7d70d8ad1a00de229e9e688","source":{"kind":"arxiv","id":"2111.03132","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.03132","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"arxiv_version","alias_value":"2111.03132v3","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.03132","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"pith_short_12","alias_value":"PCT4RNZDZ6IW","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"pith_short_16","alias_value":"PCT4RNZDZ6IWQANL","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"pith_short_8","alias_value":"PCT4RNZD","created_at":"2026-07-05T06:35:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:PCT4RNZDZ6IWQANL32ELNIXIKG","target":"record","payload":{"canonical_record":{"source":{"id":"2111.03132","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-11-04T19:56:21Z","cross_cats_sorted":["cs.ET"],"title_canon_sha256":"d0ea25bd2d4371d6dc6047258cba2f1663110aad6cb6c4bfe6282cd2ae0c0bcd","abstract_canon_sha256":"2862fe9c2a20ed3c32487d1fa74a7bfa163388c7c9656ba257b82c95635fafa1"},"schema_version":"1.0"},"canonical_sha256":"78a7c8b723cf916801abde88b6a2e85192cc8f78f7d70d8ad1a00de229e9e688","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:35:03.357206Z","signature_b64":"3z5Q8DaonXu6OBWATDN0QNIhRMB/SpcDk2urAWlGsUfoUxchG2ukp/TDCuF6emfDjD4Kbn6M9axGGuaR+CmqBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78a7c8b723cf916801abde88b6a2e85192cc8f78f7d70d8ad1a00de229e9e688","last_reissued_at":"2026-07-05T06:35:03.356711Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:35:03.356711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.03132","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:35:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mYG1Rmd7/0aTVr/MuP/E7SYv58Otd30ve7AD1Xe2e19CVKsgTbPAua5rsgePZLLTvE1s36FvFfEWsDZoRj82BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T06:06:39.927470Z"},"content_sha256":"3c5fde9a29d7b64201bf0c2db30db4471ec9115a17fcb659463ed46265ea2c24","schema_version":"1.0","event_id":"sha256:3c5fde9a29d7b64201bf0c2db30db4471ec9115a17fcb659463ed46265ea2c24"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:PCT4RNZDZ6IWQANL32ELNIXIKG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-rank quantum state preparation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.ET"],"primary_cat":"quant-ph","authors_text":"Adenilton J. da Silva, Carsten Blank, Ismael C. S. Ara\\'ujo, Israel F. Araujo","submitted_at":"2021-11-04T19:56:21Z","abstract_excerpt":"Ubiquitous in quantum computing is the step to encode data into a quantum state. This process is called quantum state preparation, and its complexity for non-structured data is exponential on the number of qubits. Several works address this problem, for instance, by using variational methods that train a fixed depth circuit with manageable complexity. These methods have their limitations, as the lack of a back-propagation technique and barren plateaus. This work proposes an algorithm to reduce state preparation circuit depth by offloading computational complexity to a classical computer. The i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.03132","kind":"arxiv","version":3},"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/2111.03132/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":"2026-07-05T06:35:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9DoBVGKM9t2m+x2urY3ct/MPtMYUFdDzuZh0HvnIJisHfR092feSyVD68MIq30BBhGSthFEMhYYN5YQ7fjiwCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T06:06:39.928201Z"},"content_sha256":"6126a3be99bda202b5b2618825bdd393cf52c78ea7951c0fb8542160034f7d4c","schema_version":"1.0","event_id":"sha256:6126a3be99bda202b5b2618825bdd393cf52c78ea7951c0fb8542160034f7d4c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PCT4RNZDZ6IWQANL32ELNIXIKG/bundle.json","state_url":"https://pith.science/pith/PCT4RNZDZ6IWQANL32ELNIXIKG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PCT4RNZDZ6IWQANL32ELNIXIKG/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":"2026-08-22T06:06:39Z","links":{"resolver":"https://pith.science/pith/PCT4RNZDZ6IWQANL32ELNIXIKG","bundle":"https://pith.science/pith/PCT4RNZDZ6IWQANL32ELNIXIKG/bundle.json","state":"https://pith.science/pith/PCT4RNZDZ6IWQANL32ELNIXIKG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PCT4RNZDZ6IWQANL32ELNIXIKG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:PCT4RNZDZ6IWQANL32ELNIXIKG","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":"2862fe9c2a20ed3c32487d1fa74a7bfa163388c7c9656ba257b82c95635fafa1","cross_cats_sorted":["cs.ET"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-11-04T19:56:21Z","title_canon_sha256":"d0ea25bd2d4371d6dc6047258cba2f1663110aad6cb6c4bfe6282cd2ae0c0bcd"},"schema_version":"1.0","source":{"id":"2111.03132","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.03132","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"arxiv_version","alias_value":"2111.03132v3","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.03132","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"pith_short_12","alias_value":"PCT4RNZDZ6IW","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"pith_short_16","alias_value":"PCT4RNZDZ6IWQANL","created_at":"2026-07-05T06:35:03Z"},{"alias_kind":"pith_short_8","alias_value":"PCT4RNZD","created_at":"2026-07-05T06:35:03Z"}],"graph_snapshots":[{"event_id":"sha256:6126a3be99bda202b5b2618825bdd393cf52c78ea7951c0fb8542160034f7d4c","target":"graph","created_at":"2026-07-05T06:35:03Z","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/2111.03132/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ubiquitous in quantum computing is the step to encode data into a quantum state. This process is called quantum state preparation, and its complexity for non-structured data is exponential on the number of qubits. Several works address this problem, for instance, by using variational methods that train a fixed depth circuit with manageable complexity. These methods have their limitations, as the lack of a back-propagation technique and barren plateaus. This work proposes an algorithm to reduce state preparation circuit depth by offloading computational complexity to a classical computer. The i","authors_text":"Adenilton J. da Silva, Carsten Blank, Ismael C. S. Ara\\'ujo, Israel F. Araujo","cross_cats":["cs.ET"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-11-04T19:56:21Z","title":"Low-rank quantum state preparation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.03132","kind":"arxiv","version":3},"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":"sha256:3c5fde9a29d7b64201bf0c2db30db4471ec9115a17fcb659463ed46265ea2c24","target":"record","created_at":"2026-07-05T06:35:03Z","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":"2862fe9c2a20ed3c32487d1fa74a7bfa163388c7c9656ba257b82c95635fafa1","cross_cats_sorted":["cs.ET"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-11-04T19:56:21Z","title_canon_sha256":"d0ea25bd2d4371d6dc6047258cba2f1663110aad6cb6c4bfe6282cd2ae0c0bcd"},"schema_version":"1.0","source":{"id":"2111.03132","kind":"arxiv","version":3}},"canonical_sha256":"78a7c8b723cf916801abde88b6a2e85192cc8f78f7d70d8ad1a00de229e9e688","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"78a7c8b723cf916801abde88b6a2e85192cc8f78f7d70d8ad1a00de229e9e688","first_computed_at":"2026-07-05T06:35:03.356711Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:35:03.356711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3z5Q8DaonXu6OBWATDN0QNIhRMB/SpcDk2urAWlGsUfoUxchG2ukp/TDCuF6emfDjD4Kbn6M9axGGuaR+CmqBw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:35:03.357206Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.03132","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3c5fde9a29d7b64201bf0c2db30db4471ec9115a17fcb659463ed46265ea2c24","sha256:6126a3be99bda202b5b2618825bdd393cf52c78ea7951c0fb8542160034f7d4c"],"state_sha256":"a1faf3b87f3e37550835e73a03a8eda818febbf79bc115aaefa38167d59de2bb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dzpdcMdk03J1AgSiBkguyW5pNHEKWB1wRGMQXW7sPHcezdDfLa2VKos69hdEeXX/QhagRZ/D0GSL2AvU3E+fDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T06:06:39.933651Z","bundle_sha256":"7506986119b2a323bcaf517031bdb8b6bc05e89179345af881bbd3d5eb2d121f"}}