Driven superconducting proximity effect in interacting quantum dots
Driven superconducting proximity effect in interacting quantum dots
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DOI：
10.1103/physrevb.85.094518
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发表时间：
2012-01
影响因子：
3.7
通讯作者：
Ali G. Moghaddam;M. Governale;J. Konig
中科院分区：
文献类型：
--
作者：
Ali G. Moghaddam;M. Governale;J. Konig
本文提出了一种由量子点与超导导线之间的含时隧道耦合引起的相互作用量子点中的非平衡超导邻近效应的理论。当驱动频率满足依赖于栅极电压的谐振条件时，可以通过隧穿电流探测到弱耦合的正常引线中的邻近效应。此外，我们建议产生和操纵相干叠加的量子点态的电子数不同的两个，通过施加脉冲振荡的变化点和超导体之间的耦合。
We present a theory of non-equilibrium superconducting proximity effect in an interacting quantum dot induced by a time-dependent tunnel coupling between dot and a superconducting lead. The proximity effect, that is established when the driving frequency fulfills a gate-voltage-dependent resonance condition, can be probed through the tunneling current into a weakly-coupled normal lead. Furthermore, we propose to generate and manipulate coherent superpositions of quantum-dot states with electron numbers differing by two, by applying pulsed oscillatory variations to the couplings between dot and superconductors.