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arXiv 1401.5950cond-mat.mes-hall
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任意延伸驱动隧道结中的含时输运

Time-dependent Transport in arbitrary extended driven tunnel junctions

Ines Safi

摘要:

我们发展了一个非常普遍的微扰理论的时间依赖性输运在弱隧道结,这是独立的实验细节和多体相关态的耦合导体。这些可以是相似的或不同的,具有任意的内部或相互作用,超导相关,无序,并耦合到电磁环境或其他量子系统。该结可以在空间上扩展,并且同时受到随时间变化的电压、局部磁场和隧穿幅度的调制。在任意频率下的所有可观测量:平均电流,非平衡导纳和电流相关性可以用一种通用的方式来表示,通过非平衡直流电流,产生微扰的时间相关的非平衡波动关系。特别是,电荷波动被证明是普遍的超泊松,并成为泊松如果结是由一系列的洛伦兹脉冲驱动。在恒压和隧穿情况下,我们还推广了泊松散粒噪声和噪声导数与电导的涨落关系。因此,我们提供了一个紧凑的,一般的和透明的统一理论在任意维度上,与所涉及的推导明确地基于特定的模型和配置文件的一个单一的时变场。

英文摘要:

We develop a very general perturbative theory of time-dependent transport in a weak tunneling junction which is independent of experimental details and on many-body correlated states in the coupled conductors. These can be similar or different, with arbitrary internal or mutual interactions, superconducting correlations, disorder, and coupled to an electromagnetic environment or other quantum systems. The junction can be spatially extended, and is subject, simultaneously, to time-dependent voltage, local magnetic field and modulation of the tunneling amplitudes. All observables at arbitrary frequencies: average current, non-equilibrium admittance and current correlations can be expressed in a universal way through the out-of-equilibrium DC current only, yielding perturbative time-dependent non-equilibrium fluctuation relations. In particular, charge fluctuations are shown to be universally super-poissonian, and to become poissonian if the junction is driven by a series of Lorentzian pulses. We also generalize, for constant voltage and tunneling, the poissonian shot noise and the fluctuation relation between the derivatives of the noise and the conductance. Thus we provide a compact, general and transparent unifying theory at arbitrary dimension, in contrast with involved derivations based explicitly on particular models and profiles of a single time-varying field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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