dorsal/arxiv
View SchemaNanometre-scale nuclear-spin device for quantum information processing
| Authors | Y. Hirayama, A. Miranowicz, T. Ota, G. Yusa, K. Muraki, S. K. Ozdemir, N. Imoto |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0605199 |
| URL | https://arxiv.org/abs/quant-ph/0605199 |
| DOI | 10.1088/0953-8984/18/21/S13 |
| Journal | J. Phys.: Condens. Matter 18 (2006) S885-S900 |
Abstract
We have developed semiconductor point contact devices in which nuclear spins in a nanoscale region are coherently controlled by all-electrical methods. Different from the standard nuclear-magnetic resonance technique, the longitudinal magnetization of nuclear spins is directly detected by measuring resistance, resulting in ultra-sensitive detection of the microscopic quantity of nuclear spins. All possible coherent oscillations have been successfully demonstrated between two levels from four nuclear spin states of I = 3/2 nuclei. Quantum information processing is discussed based on two fictitious qubits of an I = 3/2 system and methods are described for performing arbitrary logical gates both on one and two qubits. A scheme for quantum state tomography based on Mz-detection is also proposed. As the starting point of quantum manipulations, we have experimentally prepared the effective pure states for the I = 3/2 nuclear spin system.
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"abstract": "We have developed semiconductor point contact devices in which nuclear spins\nin a nanoscale region are coherently controlled by all-electrical methods.\nDifferent from the standard nuclear-magnetic resonance technique, the\nlongitudinal magnetization of nuclear spins is directly detected by measuring\nresistance, resulting in ultra-sensitive detection of the microscopic quantity\nof nuclear spins. All possible coherent oscillations have been successfully\ndemonstrated between two levels from four nuclear spin states of I = 3/2\nnuclei. Quantum information processing is discussed based on two fictitious\nqubits of an I = 3/2 system and methods are described for performing arbitrary\nlogical gates both on one and two qubits. A scheme for quantum state tomography\nbased on Mz-detection is also proposed. As the starting point of quantum\nmanipulations, we have experimentally prepared the effective pure states for\nthe I = 3/2 nuclear spin system.",
"arxiv_id": "quant-ph/0605199",
"authors": [
"Y. Hirayama",
"A. Miranowicz",
"T. Ota",
"G. Yusa",
"K. Muraki",
"S. K. Ozdemir",
"N. Imoto"
],
"categories": [
"quant-ph",
"cond-mat.mes-hall"
],
"doi": "10.1088/0953-8984/18/21/S13",
"journal_ref": "J. Phys.: Condens. Matter 18 (2006) S885-S900",
"title": "Nanometre-scale nuclear-spin device for quantum information processing",
"url": "https://arxiv.org/abs/quant-ph/0605199"
},
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