论文标题
GAAS多电子双量子点中电子音波旋转的理论
Theory on electron-phonon spin dehphasing in GaAs multi-electron double quantum dots
论文作者
论文摘要
最近的研究表明，与仅限制两个电子的传统情况相比，在某些方面，托管超过两个电子的双重量子点系统在某些方面可能是优越的（单键 - 三曲线量子量子）。我们研究了在GAAS多电子双量子点系统中发生的电子 - 播种机，在有偏见的情况下以及在没有偏见的情况下，没有杂交。我们发现，虽然电子 - 逐渐驱动率随着无偏见的情况下的电子数量的增加而增加，但在偏见的情况下，这并不成立。我们将优点数字定义为交换能量与驱动率之间的比率，并表明在交换能量的实验相关范围内，优点数字实际上随着偏见的情况下的电子数量而增加。我们的结果表明，多电子量子点系统在减轻电子phonon dephasing的效果方面具有另一个优点，这在文献中先前不被评估。
Recent studies reveal that a double-quantum-dot system hosting more than two electrons may be superior in certain aspects as compared to the traditional case in which only two electrons are confined (a singlet-triplet qubit). We study the electron-phonon dephasing occurring in a GaAs multi-electron double-quantum-dot system, in a biased case in which the singlet state is hybridized, as well as in an unbiased case in which the hybridization is absent. We have found that while the electron-phonon dephasing rate increases with the number of electrons confined in the unbiased case, this does not hold in the biased case. We define a merit figure as a ratio between the exchange energy and the dephasing rate, and have shown that in experimentally relevant range of the exchange energy, the merit figure actually increases with the number of electrons in the biased case. Our results show that the multi-electron quantum-dot system has another advantage in mitigating the effect of electron-phonon dephasing, which is previously under-appreciated in the literature.
