{"paper":{"title":"All-Electric Quantum State Transfer via Spin-Orbit Phase Matching","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Electric field tuning identifies discrete phase-matching conditions that restore near-perfect state transfer in hole-spin qubits independent of rotation axis.","cross_cats":["cond-mat.str-el"],"primary_cat":"quant-ph","authors_text":"Charles G. Smith, Madhumita Sarkar, Maksym Myronov, Roopayan Ghosh, Sougato Bose","submitted_at":"2026-05-13T18:00:14Z","abstract_excerpt":"Semiconductor hole-spin qubits offer a promising route to quantum computation due to their weak hyperfine interaction, and strong intrinsic spin-orbit coupling enabling electric control of qubits. Scalable architectures, however, require coherent long-distance quantum state transfer, which is hindered in these systems by spin-orbit induced anisotropic exchange. Here we show that this limitation can be overcome by using an all-electric control protocol. By tuning the electric field strength, we identify discrete spin-orbit phase-matching conditions that restore near-perfect state transfer, inde"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"By tuning the electric field strength, we identify discrete spin-orbit phase-matching conditions that restore near-perfect state transfer, independent of the rotation axis. Complementarily, controlling the electric field direction aligns the spin-orbit axis, suppressing excitation non-conserving processes and enabling robust transfer without fine tuning.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the idealized spin-orbit Hamiltonian and phase-matching conditions remain valid under realistic noise, disorder, and finite-temperature conditions in actual quantum-dot devices without introducing prohibitive decoherence.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Tuning electric field strength or direction restores near-perfect state transfer in hole-spin qubits via discrete spin-orbit phase-matching conditions independent of rotation axis.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Electric field tuning identifies discrete phase-matching conditions that restore near-perfect state transfer in hole-spin qubits independent of rotation axis.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"b273f966d326670127abfaa19e75ec493590d46e43c984918b48a6cfa9aaabaf"},"source":{"id":"2605.13976","kind":"arxiv","version":1},"verdict":{"id":"ab6e659f-bd1d-4032-8300-72ee1fc1576e","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T05:54:31.336453Z","strongest_claim":"By tuning the electric field strength, we identify discrete spin-orbit phase-matching conditions that restore near-perfect state transfer, independent of the rotation axis. Complementarily, controlling the electric field direction aligns the spin-orbit axis, suppressing excitation non-conserving processes and enabling robust transfer without fine tuning.","one_line_summary":"Tuning electric field strength or direction restores near-perfect state transfer in hole-spin qubits via discrete spin-orbit phase-matching conditions independent of rotation axis.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The assumption that the idealized spin-orbit Hamiltonian and phase-matching conditions remain valid under realistic noise, disorder, and finite-temperature conditions in actual quantum-dot devices without introducing prohibitive decoherence.","pith_extraction_headline":"Electric field tuning identifies discrete phase-matching conditions that restore near-perfect state transfer in hole-spin qubits independent of rotation axis."},"references":{"count":33,"sample":[{"doi":"","year":null,"title":"In this limit, Eq","work_id":"838c47c3-ad5b-438f-bce4-6ef33e84abfd","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"Loss of ground-state overlap in the full chain As discussed before,B= 0, the full four-spin Hamil- tonian preserves time-reversal symmetry, THT −1 =H,(B23) as well as reflection symmetry 1↔4,2↔3.(B24)","work_id":"6dac9be8-1e7a-4e8a-bb1a-2f0b721122cc","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"Emergence of the transport doublet Let|χ 0⟩23 denote the channel ground state. We define |L⟩=| ↑⟩ 1 ⊗ |χ0⟩23 ⊗ | ↓⟩4,(B30) |R⟩=| ↓⟩ 1 ⊗ |χ0⟩23 ⊗ | ↑⟩4.(B31) Projecting onto this subspace gives Heff = ","work_id":"4ac160c3-9b79-4175-96b2-f423ab2bbf69","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"(B33) now forθ so =π","work_id":"1a77d824-724b-43fe-9929-0fad4e291583","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":1998,"title":"D. Loss and D. P. DiVincenzo, Quantum computation with quantum dots, Physical Review A57, 120 (1998)","work_id":"97584104-5a7f-4955-b914-7bd71e47d42e","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":33,"snapshot_sha256":"1311481542468d136a89cd2e32a9500aa5979fe35206469a8926f21899b6c859","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"}