{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:KS6IYSGIPDKP5HJUXRFBX2EM57","short_pith_number":"pith:KS6IYSGI","schema_version":"1.0","canonical_sha256":"54bc8c48c878d4fe9d34bc4a1be88cefdf2a99f23d473e17a03871e7aa7c1721","source":{"kind":"arxiv","id":"2504.03149","version":1},"attestation_state":"computed","paper":{"title":"SpinHex: A low-crosstalk, spin-qubit architecture based on multi-electron couplers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Charles Smith, Frederico Martins, Josu Etxezarreta Martinez, Normann Mertig, Paul Schnabl, Rub\\'en M. Otxoa","submitted_at":"2025-04-04T04:04:01Z","abstract_excerpt":"Semiconductor spin qubits are an attractive quantum computing platform that offers long qubit coherence times and compatibility with existing semiconductor fabrication technology for scale up. Here, we propose a spin-qubit architecture based on spinless multielectron quantum dots that act as low-crosstalk couplers between a two-dimensional arrangement of spin-qubits in a hexagonal lattice. The multielectron couplers are controlled by voltage signals, which mediate fast Heisenberg exchange and thus enable coherent multi-qubit operations. For the proposed architecture, we discuss the implementat"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2504.03149","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-04-04T04:04:01Z","cross_cats_sorted":[],"title_canon_sha256":"6f1729671bc733f19c174f9bf442c5ede8352ef229ed691c5e4510efca6e4ee6","abstract_canon_sha256":"f89487b7d3d859b3441b6ad0d1664cad23b2302e3a64334a7867e1bbbb979f89"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:44:27.266520Z","signature_b64":"w6Q3kAiu5VQ41lMeUOn3h9ZYdZ7DX6BmdnyX2IuTG1TDWF4f1OJfa9/slpZZXIgabOcHRQ4Wem4K2A2AOAL9BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"54bc8c48c878d4fe9d34bc4a1be88cefdf2a99f23d473e17a03871e7aa7c1721","last_reissued_at":"2026-07-05T10:44:27.265995Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:44:27.265995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"SpinHex: A low-crosstalk, spin-qubit architecture based on multi-electron couplers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Charles Smith, Frederico Martins, Josu Etxezarreta Martinez, Normann Mertig, Paul Schnabl, Rub\\'en M. Otxoa","submitted_at":"2025-04-04T04:04:01Z","abstract_excerpt":"Semiconductor spin qubits are an attractive quantum computing platform that offers long qubit coherence times and compatibility with existing semiconductor fabrication technology for scale up. Here, we propose a spin-qubit architecture based on spinless multielectron quantum dots that act as low-crosstalk couplers between a two-dimensional arrangement of spin-qubits in a hexagonal lattice. The multielectron couplers are controlled by voltage signals, which mediate fast Heisenberg exchange and thus enable coherent multi-qubit operations. For the proposed architecture, we discuss the implementat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.03149","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2504.03149/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2504.03149","created_at":"2026-07-05T10:44:27.266056+00:00"},{"alias_kind":"arxiv_version","alias_value":"2504.03149v1","created_at":"2026-07-05T10:44:27.266056+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.03149","created_at":"2026-07-05T10:44:27.266056+00:00"},{"alias_kind":"pith_short_12","alias_value":"KS6IYSGIPDKP","created_at":"2026-07-05T10:44:27.266056+00:00"},{"alias_kind":"pith_short_16","alias_value":"KS6IYSGIPDKP5HJU","created_at":"2026-07-05T10:44:27.266056+00:00"},{"alias_kind":"pith_short_8","alias_value":"KS6IYSGI","created_at":"2026-07-05T10:44:27.266056+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":4,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.01541","citing_title":"Smooth velocity shuttling for suppressing valley excitations in disordered Si/SiGe quantum dots","ref_index":46,"is_internal_anchor":false},{"citing_arxiv_id":"2605.28936","citing_title":"Hardware-Tailored Resource Estimation for Magic-State Distillation on Silicon Spin Qubits","ref_index":67,"is_internal_anchor":false},{"citing_arxiv_id":"2604.03373","citing_title":"Enabling Modularity for Spin Qubits via Driven Quantum Dot-Mediated Entanglement","ref_index":52,"is_internal_anchor":false},{"citing_arxiv_id":"2604.24739","citing_title":"CAbLECAR: efficiently scheduling QLDPC codes on a tileable spin qubit chip with shuttling","ref_index":42,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57","json":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57.json","graph_json":"https://pith.science/api/pith-number/KS6IYSGIPDKP5HJUXRFBX2EM57/graph.json","events_json":"https://pith.science/api/pith-number/KS6IYSGIPDKP5HJUXRFBX2EM57/events.json","paper":"https://pith.science/paper/KS6IYSGI"},"agent_actions":{"view_html":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57","download_json":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57.json","view_paper":"https://pith.science/paper/KS6IYSGI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2504.03149&json=true","fetch_graph":"https://pith.science/api/pith-number/KS6IYSGIPDKP5HJUXRFBX2EM57/graph.json","fetch_events":"https://pith.science/api/pith-number/KS6IYSGIPDKP5HJUXRFBX2EM57/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57/action/storage_attestation","attest_author":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57/action/author_attestation","sign_citation":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57/action/citation_signature","submit_replication":"https://pith.science/pith/KS6IYSGIPDKP5HJUXRFBX2EM57/action/replication_record"}},"created_at":"2026-07-05T10:44:27.266056+00:00","updated_at":"2026-07-05T10:44:27.266056+00:00"}