两个相邻量子点与两个引线耦合的量子点链中的退耦与反共振
Decoupling and antiresonance in a quantum dot chain with two neighboring dots coupled to both leads
摘要：
从理论上研究了电子通过两个相邻量子点耦合到两个引线的量子点链电子输运。在这样的系统中，我们发现，只有偶数个量子点结构的每个连接点耦合相同数量的量子点，量子点的一些本征态从引线去耦。也就是说，在没有磁通量的情况下，所有奇数本征态与引线解耦，但是当引入磁通量时，所有偶数本征态将与引线解耦。此外，通过调节通过任一子环的磁通量，一些本征态与一个引线解耦但仍耦合到另一个引线，然后出现一些新的反共振。
英文摘要：
Electron transport through a quantum dot chain with two neighboring dots coupled to both leads is theoretically studied. In such a system, it is found that only for the even-numbered quantum dot structure with the same-number quantum dots coupled to each connecting dot, some eigenstates of the quantum dots decouple from the leads. Namely, all odd eigenstates decouple from the leads in the absence of magnetic flux, but all even eigenstates will decouple from the leads when a magnetic flux is introduced. In addition, by adjusting the magnetic fluxes through any subring, some eigenstates decouple from one lead but still couple to the other, and then some new antiresonances occur.
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