Baldelli Niccolò, Bhattacharya Utso, González-Cuadra Daniel, Lewenstein Maciej, Graß Tobias
Institut de Ciencies Fotoniques (ICFO), The Barcelona Institute of Science and Technology, 08860Castelldefels, Barcelona, Spain.
Institute for Theoretical Physics, University of Innsbruck, 6020Innsbruck, Austria.
ACS Omega. 2022 Dec 7;7(50):47424-47430. doi: 10.1021/acsomega.2c07169. eCollection 2022 Dec 20.
We propose a protocol to detect topological phase transitions of one-dimensional -wave superconductors from their harmonic emission spectra 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 are absent in the trivial phase. These features allow us to define a measurable signature, obtained from emission measurements, that unambiguously differentiates between the two phases. Local probing provides insight into the localized and topologically protected nature of the modes. The presented results establish that high-harmonic spectroscopy can be used as an all-optical tool for the detection of Majorana zero modes.
我们提出了一种通过强场中一维p波超导体的谐波发射光谱来检测其拓扑相变的方案。具体而言，我们识别出了由辐射边缘模式引起的光谱特征，这些特征表征了拓扑相中的光谱和态密度，而在平凡相中不存在。这些特征使我们能够定义一个从发射测量中获得的可测量特征，该特征能明确区分这两个相。局部探测揭示了模式的局域化和拓扑保护性质。所呈现的结果表明，高谐波光谱可作为检测马约拉纳零模的全光学工具。
