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arXiv 2202.03547cond-mat.mes-hall
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通过强场动力学检测马约拉纳零模式

Detecting Majorana Zero Modes via Strong Field Dynamics

Niccolò Baldelli, Utso Bhattacharya, Daniel González-Cuadra, Maciej Lewenstein, Tobias Graß

摘要:

我们提出了一个方案,以检测拓扑相变的一维$p$波超导体的谐波发射光谱在强场。具体而言,我们确定由于辐射边缘模式,其特征在于频谱和拓扑阶段的状态密度,并在平凡阶段缺席的频谱功能。这些功能使我们能够定义一个序参量,从发射测量,明确区分两个阶段。局部探测提供了对模式的局部化和拓扑保护性质的洞察。研究结果表明,高次谐波光谱可以作为一种新的全光学工具,用于检测马约拉纳零模。

英文摘要:

We propose a protocol to detect topological phase transitions of one-dimensional $p$-wave superconductors from their harmonic emission spectrum in strong fields. Specifically, we identify spectral features due to radiating edge modes, which characterize the spectrum and the density of states in the topological phase, and which are absent in the trivial phase. These features allow us to define an order parameter, obtained from emission measurements, that unambiguously differentiates between the two phases. Local probing provides insight to the localized and topologically protected nature of the modes. The presented results establish that high harmonic spectroscopy can be used as a novel all-optical tool for the detection of Majorana zero modes.

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