Pith Number

pith:W2TL5UFT

pith:2026:W2TL5UFTIPFUABXJQLQQQLXFZL

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All-Electric Quantum State Transfer via Spin-Orbit Phase Matching

Charles G. Smith, Madhumita Sarkar, Maksym Myronov, Roopayan Ghosh, Sougato Bose

Electric field tuning identifies discrete phase-matching conditions that restore near-perfect state transfer in hole-spin qubits independent of rotation axis.

arxiv:2605.13976 v1 · 2026-05-13 · quant-ph · cond-mat.str-el

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\pithnumber{W2TL5UFTIPFUABXJQLQQQLXFZL}

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Claims

C1strongest 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.

C2weakest 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.

C3one 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.

References

33 extracted · 33 resolved · 0 Pith anchors

[1] In this limit, Eq

[2] 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)

[3] 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 =

[4] (B33) now forθ so =π

[5] D. Loss and D. P. DiVincenzo, Quantum computation with quantum dots, Physical Review A57, 120 (1998) 1998

Receipt and verification

First computed	2026-05-17T23:39:13.433049Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6a6bed0b343cb4006e982e1082ee5cafee506d6aba2c4303f08df60fe676435

Aliases

arxiv: 2605.13976 · arxiv_version: 2605.13976v1 · doi: 10.48550/arxiv.2605.13976 · pith_short_12: W2TL5UFTIPFU · pith_short_16: W2TL5UFTIPFUABXJ · pith_short_8: W2TL5UFT

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/W2TL5UFTIPFUABXJQLQQQLXFZL \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: b6a6bed0b343cb4006e982e1082ee5cafee506d6aba2c4303f08df60fe676435

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc73ba0cd662683e36b3fd1efbbcfa8cba1ba90af699b392921c24dc3a95f613",
    "cross_cats_sorted": [
      "cond-mat.str-el"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-05-13T18:00:14Z",
    "title_canon_sha256": "7c6c76a5edfb5a2b35d2a57f0134e3289a7497933dc6ae502264500fc6b008d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.13976",
    "kind": "arxiv",
    "version": 1
  }
}