论文标题
热电子干涉法中的缓解反应
Mitigating decoherence in hot electron interferometry
论文作者
论文摘要
由于其高能量，量子霍尔边缘状态中的热电子可以被视为具有用于量子光学元件样实验的单个颗粒。但是，与光子不同，电子通常会在传输中经历散射过程，从而导致连贯性丧失并限制其显示量子辅助行为的能力。在这里，我们从理论上研究了马赫德尔干涉仪中热电子的变质机理，并强调了声音和光学声子发射的作用。我们讨论实验参数的最佳选择，并表明$ \ gtrsim 85 \％$的高可见性在相对较长的10 $μ$ m的热电子设备中可以实现。我们还讨论了能量过滤技术以删除磨碎的电子，并表明这可以将可见性增加到95美元以上。这代表了对费米级电子量子光学元件的改进，并建议热电子电荷泵作为实现量子量子纳米电机设备的平台。
Due to their high energy, hot electrons in quantum Hall edge states can be considered as single particles that have the potential to be used for quantum optics-like experiments. Unlike photons, however, electrons typically undergo scattering processes in transport, which results in a loss of coherence and limits their ability to show quantum-coherent behaviour. Here we study theoretically the decoherence mechanisms of hot electrons in a Mach-Zehnder interferometer, and highlight the role played by both acoustic and optical phonon emission. We discuss optimal choices of experimental parameters and show that high visibilities of $\gtrsim 85\%$ are achievable in hot-electron devices over relatively long distances of 10 $μ$m. We also discuss energy filtration techniques to remove decoherent electrons and show that this can increase visibilities to over $95\%$. This represents an improvement over Fermi-level electron quantum optics, and suggests hot-electron charge pumps as a platform for realising quantum-coherent nanoelectronic devices.
