# Floquet engineering of long-range p-wave superconductivity: Beyond the high-frequency limit

## TL;DR

This paper explores how varying the frequency of an ac field affects long-range p-wave superconductivity in a Kitaev chain, revealing new pairing interactions and multiple Floquet Majorana states beyond the high-frequency approximation.

## Contribution

It provides a theoretical analysis of Floquet engineering at intermediate frequencies, uncovering novel long-range and nearest-neighbor p-wave pairings and multiple Majorana edge states.

## Key findings

- New long-range p-wave pairing interactions identified.
- Multiple Floquet Majorana edge states discovered.
- Leading correction alters pairing energies and tunneling interactions.

## Abstract

It has been shown that long-range {\it p}-wave superconductivity in a Kitaev chain can be engineered via an ac field with a high frequency [Benito et al., Phys. Rev. B 90, 205127 (2014)]. For its experimental realization, however, theoretical understanding of Floquet engineering with a broader range of driving frequencies becomes important. In this work, focusing on the ac-driven tunneling interactions of a Kitaev chain, we investigate effects from the leading correction to the high-frequency limit on the emergent {\it p}-wave superconductivity. Importantly, we find new engineered long-range {\it p}-wave pairing interactions that can significantly alter the ones in the high-frequency limit at long interaction ranges. We also find that the leading correction additionally generates nearest-neighbor {\it p}-wave pairing interactions with a renormalized pairing energy, long-range tunneling interactions, and in particular multiple pairs of Floquet Majorana edge states that are destroyed in the high- frequency limit.