dorsal/arxiv
View SchemaSpin-dependent recombination - an electronic readout mechanism for solid state quantum computers
| Authors | Christoph Boehme, Klaus Lips |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0208040 |
| URL | https://arxiv.org/abs/quant-ph/0208040 |
| DOI | 10.1002/1521-3951(200210)233:3<427::AID-PSSB427>3.0.CO;2-J |
| Journal | physica status solidi (b) 233, 3, p. 427 - 435, 26 SEP 2002 |
Abstract
It is shown that coherent spin motion of electron-hole pairs localized in band gap states of silicon can influence charge carrier recombination. Based on this effect, a readout concept for silicon based solid-state spin--quantum computers as proposed by Kane is suggested. The 31P quantum bit (qbit) is connected via hyperfine coupling to the spin of the localized donor electron. When a second localized and singly occupied electronic state with an energy level deep within the band gap or close to the valence edge is in proximity, a gate controlled exchange between the 31P nucleus and the two electronic states can be activated that leaves the donor-deep level pair either unchanged in a |T->-state or shifts it into a singlet state |S>. Since the donor deep level transition is spin-dependent, the deep level becomes charged or not, depending on the nuclear spin orientation of the donor nucleus. Thus, the state of the qbit can be read with a sequence of light pulses and photo conductivity measurements.
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"abstract": "It is shown that coherent spin motion of electron-hole pairs localized in\nband gap states of silicon can influence charge carrier recombination. Based on\nthis effect, a readout concept for silicon based solid-state spin--quantum\ncomputers as proposed by Kane is suggested. The 31P quantum bit (qbit) is\nconnected via hyperfine coupling to the spin of the localized donor electron.\nWhen a second localized and singly occupied electronic state with an energy\nlevel deep within the band gap or close to the valence edge is in proximity, a\ngate controlled exchange between the 31P nucleus and the two electronic states\ncan be activated that leaves the donor-deep level pair either unchanged in a\n|T-\u003e-state or shifts it into a singlet state |S\u003e. Since the donor deep level\ntransition is spin-dependent, the deep level becomes charged or not, depending\non the nuclear spin orientation of the donor nucleus. Thus, the state of the\nqbit can be read with a sequence of light pulses and photo conductivity\nmeasurements.",
"arxiv_id": "quant-ph/0208040",
"authors": [
"Christoph Boehme",
"Klaus Lips"
],
"categories": [
"quant-ph"
],
"doi": "10.1002/1521-3951(200210)233:3\u003c427::AID-PSSB427\u003e3.0.CO;2-J",
"journal_ref": "physica status solidi (b) 233, 3, p. 427 - 435, 26 SEP 2002",
"title": "Spin-dependent recombination - an electronic readout mechanism for solid state quantum computers",
"url": "https://arxiv.org/abs/quant-ph/0208040"
},
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