dorsal/arxiv
View SchemaSingle-spin readout for buried dopant semiconductor qubits
| Authors | L. C. L. Hollenberg, C. J. Wellard, C. I. Pakes, A. G. Fowler |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402077 |
| URL | https://arxiv.org/abs/quant-ph/0402077 |
| DOI | 10.1103/PhysRevB.69.233301 |
| Journal | Physical Review B 69, 233301 (2004) |
Abstract
In the design of quantum computer architectures that take advantage of the long coherence times of dopant nuclear and electron spins in the solid-state, single-spin detection for readout remains a crucial unsolved problem. Schemes based on adiabatically induced spin-dependent electron tunnelling between individual donor atoms, detected using a single electron transistor (SET) as an ultra-sensitive electrometer, are thought to be problematic because of the low ionisaton energy of the final D- state. In this paper we analyse the adiabatic scheme in detail. We find that despite significant stabilization due to the presence of the D+, the field strengths required for the transition lead to a shortened dwell-time placing severe constraints on the SET measurement time. We therefore investigate a new method based on resonant electron transfer, which operates with much reduced field strengths. Various issues in the implementation of this method are also discussed.
{
"annotation_id": "9ac8622e-d049-44b5-a5d6-ada5c1386e56",
"date_created": "2026-03-02T18:02:06.993000Z",
"date_modified": "2026-03-02T18:02:06.993000Z",
"file_hash": "7ddd5e075008c4c9fb871b1a2ce91181fba4665c0ca893284b48e4624b9a25a5",
"private": false,
"record": {
"abstract": "In the design of quantum computer architectures that take advantage of the\nlong coherence times of dopant nuclear and electron spins in the solid-state,\nsingle-spin detection for readout remains a crucial unsolved problem. Schemes\nbased on adiabatically induced spin-dependent electron tunnelling between\nindividual donor atoms, detected using a single electron transistor (SET) as an\nultra-sensitive electrometer, are thought to be problematic because of the low\nionisaton energy of the final D- state. In this paper we analyse the adiabatic\nscheme in detail. We find that despite significant stabilization due to the\npresence of the D+, the field strengths required for the transition lead to a\nshortened dwell-time placing severe constraints on the SET measurement time. We\ntherefore investigate a new method based on resonant electron transfer, which\noperates with much reduced field strengths. Various issues in the\nimplementation of this method are also discussed.",
"arxiv_id": "quant-ph/0402077",
"authors": [
"L. C. L. Hollenberg",
"C. J. Wellard",
"C. I. Pakes",
"A. G. Fowler"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevB.69.233301",
"journal_ref": "Physical Review B 69, 233301 (2004)",
"title": "Single-spin readout for buried dopant semiconductor qubits",
"url": "https://arxiv.org/abs/quant-ph/0402077"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "9378bffa-88c3-4d4c-84f7-2863f9ca6d9f",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}