{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:BX72J2WULWFZKCLMTETPV2Z77J","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":"e9e566800b8fdb39fd172f5a1a55f558d7b28535c4dafd4b58d40ce6423b4a2d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-10-07T18:00:36Z","title_canon_sha256":"2c80a8d3e4afa682fc975a2b3ccb33a8aaee1f94d300ca5e187658746183560a"},"schema_version":"1.0","source":{"id":"2110.03709","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.03709","created_at":"2026-07-05T04:57:43Z"},{"alias_kind":"arxiv_version","alias_value":"2110.03709v2","created_at":"2026-07-05T04:57:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.03709","created_at":"2026-07-05T04:57:43Z"},{"alias_kind":"pith_short_12","alias_value":"BX72J2WULWFZ","created_at":"2026-07-05T04:57:43Z"},{"alias_kind":"pith_short_16","alias_value":"BX72J2WULWFZKCLM","created_at":"2026-07-05T04:57:43Z"},{"alias_kind":"pith_short_8","alias_value":"BX72J2WU","created_at":"2026-07-05T04:57:43Z"}],"graph_snapshots":[{"event_id":"sha256:135ac4dc7993fba230c1306ff0bd4e5a7fda68caa6e29b0ea9e91a29866dd216","target":"graph","created_at":"2026-07-05T04:57:43Z","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/2110.03709/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Current noise levels in physical realizations of qubits and quantum operations limit the applicability of conventional methods to characterize entanglement. In this adverse scenario, we follow a quantum variational approach to estimate the geometric measure of entanglement of multiqubit pure states. The algorithm requires only single-qubit gates and measurements, so it is well suited for NISQ devices. This is demonstrated by successfully implementing the method on IBM Quantum devices for Greenberger-Horne-Zeilinger states of $3$, $4$, and $5$ qubits. Numerical simulations with random states sh","authors_text":"A. Delgado, A. D. Mu\\~noz-Moller, J. Cort\\'es-Vega, L. Pereira, L. Zambrano","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-10-07T18:00:36Z","title":"Variational determination of multi-qubit geometrical entanglement in NISQ computers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.03709","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":"sha256:3cc3b7329bb22ae0040dd6a58ea0f6fb8af7967230c5edb2d4bc23c41f7ef662","target":"record","created_at":"2026-07-05T04:57:43Z","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":"e9e566800b8fdb39fd172f5a1a55f558d7b28535c4dafd4b58d40ce6423b4a2d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2021-10-07T18:00:36Z","title_canon_sha256":"2c80a8d3e4afa682fc975a2b3ccb33a8aaee1f94d300ca5e187658746183560a"},"schema_version":"1.0","source":{"id":"2110.03709","kind":"arxiv","version":2}},"canonical_sha256":"0dffa4ead45d8b95096c9926faeb3ffa64e5587fd5fe356ae37fb9fe841c9e20","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0dffa4ead45d8b95096c9926faeb3ffa64e5587fd5fe356ae37fb9fe841c9e20","first_computed_at":"2026-07-05T04:57:43.396969Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:57:43.396969Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dR1gnQPjJEqgrHqC35QTox2tysz1DUodphQwGdD2xWVVqozPXT76XZJJxnBXY8U0X+xM/Xx5oyne/xT7tPovBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:57:43.397416Z","signed_message":"canonical_sha256_bytes"},"source_id":"2110.03709","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3cc3b7329bb22ae0040dd6a58ea0f6fb8af7967230c5edb2d4bc23c41f7ef662","sha256:135ac4dc7993fba230c1306ff0bd4e5a7fda68caa6e29b0ea9e91a29866dd216"],"state_sha256":"c6cd60a6505f0ac185314541245a85e415f02d4d8e5e3a931a33612819e82cd9"}