论文标题
观察与时间分辨光发射的连贯性
Observing coherences with time-resolved photoemission
论文作者
论文摘要
我们使用当前的时间和角度分辨的光发射技术讨论了分散固体和类似值的单个水平的相干的潜在创造和测量。我们表明，在这两种情况下，当泵和探针都与相干水平的能量重叠时，以及当探针优先测量一个水平时，与另一个水平相比，时间分辨的光发射信号在水平之间的能量差上显示出击败模式。对于分散带，这会导致动量依赖性振荡，这些振荡可用于绘制带结构中的小能量尺度。我们进一步开发了用于时间分辨光发射的双面Feynman图，并讨论了对谐波的测量，以了解量子和分散带的特征。
We discuss the potential creation and measurement of coherences in both dispersive solids and qubit-like single levels using current generation time- and angle-resolved photoemission technology. We show that in both cases, when both the pump and the probe overlap energetically with the coherent levels, and when the probe preferentially measures one level as compared to the other, that the time-resolved photoemission signal shows a beating pattern at the energy difference between the levels. In the case of dispersive bands, this leads to momentum-dependent oscillations, which may be used to map out small energy scales in the band structure. We further develop the two-sided Feynman diagrams for time-resolved photoemission, and discuss the measurement of decoherence to gain insight into the characteristics of qubit and dispersive bands.
