{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:XWNGNUWGIUTQFUNMD7JYXR3CIZ","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":"0d6f799ca8a73940cf952665e67123a85ea7eb400b6004cb975e4b053d705969","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-09-14T06:27:28Z","title_canon_sha256":"323e6c8ecf6c0f2da36a570908ffe0405dc586d13cf32869603a9db3076fa249"},"schema_version":"1.0","source":{"id":"1009.2571","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.2571","created_at":"2026-05-18T04:31:51Z"},{"alias_kind":"arxiv_version","alias_value":"1009.2571v2","created_at":"2026-05-18T04:31:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.2571","created_at":"2026-05-18T04:31:51Z"},{"alias_kind":"pith_short_12","alias_value":"XWNGNUWGIUTQ","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"XWNGNUWGIUTQFUNM","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"XWNGNUWG","created_at":"2026-05-18T12:26:17Z"}],"graph_snapshots":[{"event_id":"sha256:5ceffdb2b710f44096e84cba1f376f5d46bda1281c890638b78eb440c8d2f247","target":"graph","created_at":"2026-05-18T04:31:51Z","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 show that the ability to create entanglement is necessary for execution of bipartite quantum gates even when they are applied to unentangled states and create no entanglement. Starting with a simple example we demonstrate that to execute such a gate bi-locally the local operations and classical communications (LOCC) should be supplemented by shared entanglement. Our results point to the changes in quantum discord, which is a measure of quantumness of correlations even in the absence of entanglement, as the indicator of failure of a LOCC implementation of the gates.","authors_text":"Aharon Brodutch, Daniel R. Terno","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-09-14T06:27:28Z","title":"Entanglement, discord and the power of quantum computation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.2571","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":"sha256:7a2a2572ce350378c64ceb972d52188587634ed48e15b6dff1ba5a0695385f45","target":"record","created_at":"2026-05-18T04:31:51Z","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":"0d6f799ca8a73940cf952665e67123a85ea7eb400b6004cb975e4b053d705969","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2010-09-14T06:27:28Z","title_canon_sha256":"323e6c8ecf6c0f2da36a570908ffe0405dc586d13cf32869603a9db3076fa249"},"schema_version":"1.0","source":{"id":"1009.2571","kind":"arxiv","version":2}},"canonical_sha256":"bd9a66d2c6452702d1ac1fd38bc7624649f37c30077e285a316334b4b67eff51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd9a66d2c6452702d1ac1fd38bc7624649f37c30077e285a316334b4b67eff51","first_computed_at":"2026-05-18T04:31:51.057479Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:31:51.057479Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GR9CkjuwsgoqyiM72zlpq7ZT/wSq+m4istzwuHDB2qucipEnxPYrQIemjFB723Nx7/DXUmWOUgaIPZqpAjiuDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:31:51.057916Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.2571","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a2a2572ce350378c64ceb972d52188587634ed48e15b6dff1ba5a0695385f45","sha256:5ceffdb2b710f44096e84cba1f376f5d46bda1281c890638b78eb440c8d2f247"],"state_sha256":"ce9ca314423cd983eb7cd4ee36bcc4c2cebdfe9dd3915f16d408d8387be7f681"}