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000139683 0247_ $$2doi$$a10.1103/PhysRevB.87.195309
000139683 0247_ $$2ISSN$$a0163-1829
000139683 0247_ $$2ISSN$$a1095-3795
000139683 0247_ $$2ISSN$$a1550-235X
000139683 0247_ $$2ISSN$$a0556-2805
000139683 0247_ $$2ISSN$$a1098-0121
000139683 0247_ $$2arXiv$$aarXiv:1211.0417
000139683 0247_ $$2WOS$$aWOS:000319252200005
000139683 0247_ $$2Handle$$a2128/5596
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000139683 1001_ $$0P:(DE-Juel1)145051$$aMehl, Sebastian$$b0$$eCorresponding author$$ufzj
000139683 245__ $$aNoise analysis of qubits implemented in triple quantum dot systems in a Davies master equation approach
000139683 260__ $$aCollege Park, Md.$$bAPS$$c2013
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000139683 500__ $$3POF3_Assignment on 2016-02-29
000139683 500__ $$a30 pages, 18 figures
000139683 520__ $$aWe analyze the influence of noise for qubits implemented using a triple quantum dot spin system. We give a detailed description of the physical realization and develop error models for the dominant external noise sources. We use a Davies master equation approach to describe their influence on the qubit. The triple dot system contains two meaningful realizations of a qubit: We consider a subspace and a subsystem of the full Hilbert space to implement the qubit. We test the robustness of these two implementations with respect to the qubit stability. When performing the noise analysis, we extract the initial time evolution of the qubit using a Nakajima-Zwanzig approach. We find that the initial time evolution, which is essential for qubit applications, decouples from the long time dynamics of the system. We extract probabilities for the qubit errors of dephasing, relaxation and leakage. Using the Davies model to describe the environment simplifies the noise analysis. It allows us to construct simple toy models, which closely describe the error probabilities.
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000139683 7001_ $$0P:(DE-Juel1)143759$$aDiVincenzo, David$$b1$$ufzj
000139683 77318 $$2Crossref$$3journal-article$$a10.1103/physrevb.87.195309$$bAmerican Physical Society (APS)$$d2013-05-20$$n19$$p195309$$tPhysical Review B$$v87$$x1098-0121$$y2013
000139683 773__ $$0PERI:(DE-600)2844160-6$$a10.1103/PhysRevB.87.195309$$gVol. 87, no. 19, p. 195309$$n19$$p195309$$tPhysical review / B$$v87$$x1098-0121$$y2013
000139683 8564_ $$yPublishers version according to licensing conditions.$$zPublished final document.
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