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Controlled operations in a strongly correlated two-electron quantum ring

机译:强相关双电子量子环中的受控操作

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摘要

We have analyzed the electronic spectrum and wave-function characteristics of a strongly correlated two-electron quantum ring with model parameters close to those observed in experiments. The analysis is based on an exact diagonalization of the Hamiltonian in a large B-spline basis. We propose a qubit pair for storing quantum information, where one component is stored in the total electron spin and one multivalued "quMbit" is represented by the total angular momentum. In this scheme the controlled-NOT quantum gate is demonstrated with near 100% fidelity for a realistic far-infrared electromagnetic pulse.
机译:我们已经分析了模型参数接近实验观察到的强相关双电子量子环的电子光谱和波函数特性。该分析基于大B样条曲线上哈密顿量的精确对角线化。我们提出了一个用于存储量子信息的量子位对,其中一个分量存储在总电子自旋中,一个多值“ quMbit”用总角动量表示。在该方案中,对于实际的远红外电磁脉冲,受控NOT量子门的保真度接近100%。

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