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首页> 外文期刊>Physical review >Transport properties of a superconducting single-electron transistor coupled to a nanomechanical oscillator
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Transport properties of a superconducting single-electron transistor coupled to a nanomechanical oscillator

机译：耦合到纳米机械振荡器的超导单电子晶体管的传输特性

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摘要

We investigate a superconducting single-electron transistor capacitively coupled to a nanomechanical oscillator and focus on the double Josephson quasiparticle resonance. The existence of two coherent Cooper-pair tunneling events is shown to lead to pronounced back action effects. Measuring the current and the shot noise provides a direct way of gaining information on the state of the oscillator. In addition to an analytical discussion of the linear-response regime, we discuss and compare results of higher-order approximation schemes and a fully numerical solution. We find that cooling of the mechanical resonator is possible and that there are driven and bistable oscillator states at low couplings. Finally, we also discuss the frequency dependence of the charge noise and the current noise of the superconducting single electron transistor.
机译：我们研究电容耦合到纳米机械振荡器的超导单电子晶体管，并专注于双重约瑟夫森准粒子共振。已证明存在两个相干的库珀对隧穿事件，会导致明显的反作用效应。测量电流和散粒噪声提供了获取有关振荡器状态信息的直接方法。除了对线性响应机制的分析讨论之外，我们还讨论和比较高阶近似方案和全数值解的结果。我们发现，机械谐振器的冷却是可能的，并且在低耦合状态下存在驱动状态和双稳态振荡器状态。最后，我们还讨论了超导单电子晶体管电荷噪声和电流噪声的频率依赖性。

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