Floquet-Enriched Nontrivial Topology at Quantum Criticality

• URL: http://arxiv.org/abs/2410.15395v1
• Date: Sun, 20 Oct 2024 14:06:02 GMT
• Title: Floquet-Enriched Nontrivial Topology at Quantum Criticality
• Authors: Longwen Zhou, Xue-Jia Yu,
• Abstract summary: We identify a new class of Floquet criticality characterized by nontrivial topology. For generic driven Majorana fermion chains with chiral symmetry, we analytically demonstrate that Floquet driving can enrich the transition point. We provide an intuitive physical explanation for the underlying mechanism of the nontrivial topology at Floquet criticality.
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• Abstract: Periodically driven (Floquet) systems have attracted growing attention due to the emergence of intriguing phenomena that are absent in equilibrium physics. In this letter, we identify a new class of Floquet criticality characterized by nontrivial topology. For generic driven Majorana fermion chains with chiral symmetry, we analytically demonstrate that Floquet driving can enrich the transition point, resulting in topologically distinct quantum critical lines that are absent in undriven systems. Furthermore, we provide an intuitive physical explanation for the underlying mechanism of the nontrivial topology at Floquet criticality and generalize our results to higher dimensions. This work not only extends the scope of topological physics in Floquet systems but also deepens our understanding of gapless topological phases of matter.

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