paper

Floquet first- and higher-order topological superconductors: A review

arXiv:2611.13804 · doi:10.1088/1361-648X/aeb05a

Abstract

The current developments in quantum technologies are deeply rooted in quantum computation, with Majorana fermions and their topological protection expected to play a central role. In this context, topological superconductors (TSCs) provide a promising platform for investigating Majorana modes and their potential applications in topological quantum computation. In dimensions , the spatial localization of topological Majorana modes can be controlled in higher-order topological superconductors (HOTSCs), extending beyond the conventional framework of first-order topological superconductors (FOTSCs). In this review, we systematically survey the diverse landscape of topological superconductivity, ranging from FOTSCs to third-order topological superconductors (TOTSCs), in which the spatial dimensionality of Majorana zero modes (MZMs) is progressively reduced. We demonstrate how periodic driving protocols enable Floquet engineering of all these phases, even when the corresponding undriven systems are topologically trivial. Furthermore, we investigate various driving schemes and explore the interplay among spin-orbit coupling, magnetic fields, magnetic impurities, and symmetry-breaking mass terms in realizing Floquet higher-order topological superconducting (FHOTSC) phases, characterized by appropriate topological invariants. We also provide an extensive discussion of topological invariants capable of distinguishing conventional MZMs from anomalous Majorana -modes, which emerge at two distinct quasienergies and have no static counterparts.

arXiv comment28 pages without references and 16 figures- Invited Topical Review in Journal of Physics: Condensed Matter

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