“Driven Andreev molecule” by Andriani Keliri
Автор: Virtual Science Forum
Загружено: 2023-02-11
Просмотров: 274
https://arxiv.org/abs/2208.11541
Authors: Andriani Keliri, Benoît Douçot
We study the three terminal S-QD-S-QD-S Josephson junction biased with commensurate voltages. In the absence of voltage bias, the Andreev bound states (ABS) on each quantum dot hybridize and form an Andreev molecule, producing non-local effects in the Josephson current. However, the range of the hybridization is limited by the superconducting coherence length $\xi_0$.
Application of commensurate dc voltages makes the system time-periodic, and the equilibrium ABS evolve into ladders of resonances with a finite lifetime due to multiple Andreev reflection processes. We use Floquet theory to map to a tight-binding model, and we calculate the Floquet spectrum and the subgap current. When the distance between the dots is $R\sim \xi_0,$ we find level splitting and modification of the subgap structure due to the proximity of the two junctions. Moreover, in the regime of large dot separation $R\gg \xi_0,$ we find that
Доступные форматы для скачивания:
Скачать видео mp4
-
Информация по загрузке:
