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arXiv 1112.4286cond-mat.mes-hall
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量子霍尔区单粒子源发射电子的谱分布和波函数

Spectral distribution and wavefunction of electrons emitted from a single particle source in the quantum Hall regime

F. Battista, P. Samuelsson

摘要:

我们从理论上研究了按需单粒子源发射电子的光谱方案。整个系统,与电子旋转门源和单级量子点光谱仪,在量子霍尔制度中的导体中的边缘状态实现。采用Floquet散射的方法,在一个单一的理论框架内的源和光谱仪进行了分析。在点谱仪上通过直流电流分析了发射电子的非平衡分布。在绝热和中间源频率制度,分布被发现强烈的峰值周围的旋转栅门的主动谐振水平。在高频率下,分布被分成一组条纹,这是由通过旋转门的共振传输和单个Floquet量子的吸收或发射的相互作用引起的。对于理想的源操作,每周期发射一个电子,推导出单电子波函数的表达式。

英文摘要:

We investigate theoretically a scheme for spectroscopy of electrons emitted by an on-demand single particle source. The total system, with an electron turnstile source and a single level quantum dot spectrometer, is implemented with edge states in a conductor in the quantum Hall regime. Employing a Floquet scattering approach, the source and the spectrometer are analyzed within a single theoretical framework. The non-equilibrium distribution of the emitted electrons is analyzed via the direct current at the dot spectrometer. In the adiabatic and intermediate source frequency regimes, the distribution is found to be strongly peaked around the active resonant level of the turnstile. At high frequencies the distribution is split up into a set of fringes, resulting from the interplay of resonant transport through the turnstile and absorption or emission of individual Floquet quanta. For ideal source operation, with exactly one electron emitted per cycle, an expression for the single electron wavefunction is derived.

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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