自旋极化一维系统中自旋和电荷的光谱跟踪
Tracking spin and charge with spectroscopy in spin-polarised 1D systems
摘要：
我们计算了一维强相互作用费米子链的谱函数，其中的响应可以很好地理解在自旋子和holon激发。当自旋物种之间的自旋不平衡增加时，我们观察到完全极化系统的单电子响应从holon峰发出，而自旋响应消失。对于探测一维性质的实验装置，我们提出这种方法作为一种额外的通用工具，以帮助识别光谱结构，例如在ARPES测量。我们表明，这甚至适用于被困系统具有冷原子气体实验的想法。
英文摘要：
We calculate the spectral function of a one-dimensional strongly interacting chain of fermions, where the response can be well understood in terms of spinon and holon excitations. Upon increasing the spin imbalance between the spin species, we observe the single-electron response of the fully polarised system to emanate from the holon peak while the spinon response vanishes. For experimental setups that probe one-dimensional properties, we propose this method as an additional generic tool to aid the identification of spectral structures, e.g. in ARPES measurements. We show that this applies even to trapped systems having cold atomic gas experiments in mind.
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