拓扑量子淬火中马约拉纳杂化的波纹特征
Ripple Signatures of Majorana Hybridization across a Topological Quantum Quench
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中文总结 AI 辅助
本文采用自洽含时Bogoliubov-de Gennes理论，研究拓扑淬火费米超流体中马约拉纳边界模的演化，发现波纹结构源于马约拉纳边界态的杂化干涉，为探测马约拉纳物理提供了非平衡新方法。
中文摘要 AI 辅助
拓扑与非平衡动力学的交叉已成为一个丰富的前沿领域，其中量子系统可展现出平衡态下无法实现的独特动力学现象。特别受关注的是拓扑相变过程中的淬火动力学，因其可能揭示潜在马约拉纳零能态的信息。本文采用自洽含时Bogoliubov-de Gennes理论，研究淬火费米超流体中马约拉纳边界模的演化。对于拓扑区域内的量子淬火，马约拉纳边界模虽得以保留，但会因波函数的非绝热形变发生相干边界振荡。此外，在拓扑突变的突然淬火后，淬火后的密度分布中会出现显著的波纹图案。本文确定这些波纹结构源于初始分离的马约拉纳边界态的相干杂化与干涉。研究结果确立了非平衡边界动力学作为探测马约拉纳物理的新方法，该方法可补充传统平衡测量手段。
英文摘要
The crossover between topology and nonequilibrium dynamics has emerged as a rich frontier, in which quantum systems can exhibit unique dynamical phenomena that lie beyond the reach of equilibrium. Of particular interest are quench dynamics across topological phase, as it may reveal the information about the underlying Majorana zero-energy states. Here, we investigate the fate of Majorana boundary modes in a quenched fermionic superfluid using self-consistent time-dependent Bogoliubov-de Gennes theory. For quantum quenches within the topological regime, Majorana boundary modes survive but undergo coherent boundary oscillations arising from the nonadiabatic deformation of their wave functions. Furthermore, a pronounced ripple pattern appears in the post-quench density distribution following a sudden topology-changing quench. Here we identify that these ripple structures originates from the coherent hybridization and interference of the initially separated Majorana boundary states. Our findings establish nonequilibrium boundary dynamics as a new approach for probing Majorana physics, which is complementary to conventional equilibrium measurements.
