论文标题
波数据包散射延迟弹道两末端设备的非近代性
Non-Reciprocity of the Wave Packet Scattering Delay in Ballistic Two-Terminal Devices
论文作者
论文摘要
在线性状态下，弹道两端设备的传输特性通常被认为与电流方向无关。这种两末端的互惠性适用于电子传输和反射概率。但是，它不适用于波数据包的散射延迟。实际上，\ emph {四}不同的时间延迟分别描述了从两个终端到达的波数据包的传输和反射过程。与概率不同，如果散射矩阵的通道交换对称性被损坏，这些延迟是依赖方向。
In the linear regime, transport properties of ballistic two-terminal devices are generally considered to be independent of the direction of the current. This two-terminal reciprocity applies to both the electron transmission and reflection probabilities. However, it does not apply to the scattering delays of wave packets. Indeed, \emph{four} different time delays describe the transmission and reflection processes of wave packets arriving from the two terminals, respectively. Unlike the probabilities, these delays are direction dependent if the channel exchange symmetry of the scattering matrix is broken.
