嵌入量子点的量子线中波包的含时磁输运
Time-dependent magnetotransport of a wave packet in a quantum wire with embedded quantum dots
摘要：
研究了在均匀磁场作用下，波包在嵌入反点和嵌入平行双开量子点的量子线中的传播。基于Lippmann-Schwinger公式计算了磁导和电子波包的时间演化。这种方法使我们能够看到任意嵌入的电势分布，并通过对电子波包通过量子线的电导和时间演化进行计算模拟来说明结果。在双点系统中，我们观察到一个长寿命的共振态，该共振态增强了波包的空间扩展，当波包的包络函数在适当的磁场中覆盖多个子带时，诱导出类似量子跳跃的轨道.
英文摘要：
We consider wave packet propagation in a quantum wire with either an embedded antidot or an embedded parallel double open quantum dot under the influence of a uniform magnetic field. The magnetoconductance and the time evolution of an electron wave packet are calculated based on the Lippmann-Schwinger formalism. This approach allows us to look at arbitrary embedded potential profiles and illustrate the results by performing computational simulations for the conductance and the time evolution of the electron wave packet through the quantum wire. In the double-dot system we observe a long-lived resonance state that enhances the spatial spreading of the wave packet, and quantum skipping-like trajectories are induced when the envelop function of the wave packet covers several subbands in appropriate magnetic fields.
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