Nuclear spin state narrowing via gate--controlled Rabi oscillations in a double quantum dot

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dc.creatorKlauser, D.
dc.creatorCoish, W. A.
dc.creatorLoss, Daniel
dc.date2005-10-07
dc.date2006-03-13
dc.date.accessioned2026-07-07T06:44:10Z
dc.date.available2026-07-07T06:44:10Z
dc.descriptionWe study spin dynamics for two electrons confined to a double quantum dot under the influence of an oscillating exchange interaction. This leads to driven Rabi oscillations between the $\ket{\uparrow\downarrow}$--state and the $\ket{\downarrow\uparrow}$--state of the two--electron system. The width of the Rabi resonance is proportional to the amplitude of the oscillating exchange. A measurement of the Rabi resonance allows one to narrow the distribution of nuclear spin states and thereby to prolong the spin decoherence time. Further, we study decoherence of the two-electron states due to the hyperfine interaction and give requirements on the parameters of the system in order to initialize in the $\ket{\uparrow\downarrow}$--state and to perform a $\sqrt{\mathrm{SWAP}}$ operation with unit fidelity.
dc.descriptionv1:9 pages, 1 figure; v2: 13 pages, 2 figures, added section on measurement, to appear in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0510177
dc.identifierhttp://arxiv.org/abs/cond-mat/0510177
dc.identifierPhys. Rev. B 73, 205302 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.205302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102689
dc.subjectMesoscale and Nanoscale Physics
dc.titleNuclear spin state narrowing via gate--controlled Rabi oscillations in a double quantum dot
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