Harmonic emission as a probe to coherent transitions in the topological superconductors

TL;DR

This paper explores how harmonic emission can be used to detect coherent transitions and Majorana bound states in topological superconductors under laser driving, revealing dynamical stability and quasiparticle behavior.

Contribution

It introduces a novel method using harmonic emission to probe topological and dynamical properties of superconductors, emphasizing laser-driven coherent transitions and Majorana states.

Findings

Enhanced static emission with plateau structure under laser driving

Observation of Rabi-like oscillations indicating coherent transitions

Confirmation of quasiparticle nature via band population analysis

Abstract

We investigate the dynamical behavior of a topological superconducting system, demonstrating that its static configuration undergoes a transition driven by an intrinsic supercurrent. By analyzing the band population, we confirm the quasiparticle nature of the system both in the presence and absence of an external laser field. Under laser driving, we observe an enhancement in static emission forming a plateau-like structure, accompanied by multiple coherent transitions in the population. These transitions exhibit Rabi-like oscillations, attributed to the presence of Majorana bound states (MBS), further reinforcing the quasiparticle character of the model. Our results highlight the efficacy of laser driving as a probe of the system's topological and dynamical stability.