论文标题
使用隧道阶段控制的非平衡状态中使用差分噪声和电导来揭示通用主要分数化
Revealing universal Majorana fractionalization using differential shot noise and conductance in nonequilibrium states controlled by tunneling phases
论文作者
论文摘要
Majorana量子点设备中量子传输特性的普遍分数预计将出现在良好分离的主要结合状态下。我们表明，在低偏置电压$ v $下，仅在理想的设置中出现，只有一个与量子点挂在一个Majorana模式的理想设置中，在低偏置电压$ v $下仅出现差异射击噪声$ \ partial s^>/partial partial v $的主要s^>/\ ponding $ \ partial $ \ partial $ \ partiage $ \ partiage $ \ partial $ \ partial $ \ partiage $ \ partiage $ \。在逼真的设备中，这两种Majorana模式都与量子点纠缠在一起，$ \ partial s^>/\ partial v $和$ \ partial i/\ partial v $变得非常敏感，对隧道阶段非常敏感，即使对于良好分离的主要群体结束的国家，也很难观察到它们的通用分数值。相比之下，如这里所示，比率$ $（\ partial s^>/\ partial v）/（\ partial I/\ partial v）$弱取决于隧道阶段，并且当Majoragan Bound态在显着重叠时较大的分离状态或无数状态时是分数的。重要的是，对于非常大的$ v $，我们证明该比率完全独立于隧道阶段，并且可以在最新的实验中观察到它的通用分数值。
Universal fractionalization of quantum transport characteristics in Majorana quantum dot devices is expected to emerge for well separated Majorana bound states. We show that the Majorana universality of the differential shot noise $\partial S^>/\partial V$ and conductance $\partial I/\partial V$ at low bias voltages $V$ arises only in ideal setups with only one Majorana mode entangled with the quantum dot. In realistic devices, where both Majorana modes are entangled with the quantum dot, $\partial S^>/\partial V$ and $\partial I/\partial V$ become very sensitive to tunneling phases and their universal fractional values are hard to observe even for well separated Majorana bound states. In contrast, as revealed here, the ratio $(\partial S^>/\partial V)/(\partial I/\partial V)$ weakly depends on the tunneling phases and is fractional when the Majorana bound states are well separated or integer when they significantly overlap. Importantly, for very large $V$ we demonstrate that this ratio becomes fully independent of the tunneling phases and its universal fractional Majorana value may be observed in state-of-the-art experiments.
