Reshaping the Jaynes-Cummings ladder with Majorana bound states

TL;DR

This paper investigates how Majorana bound states influence the optical properties of a quantum dot-cavity system, revealing new transitions and spectral features that reshape the Jaynes-Cummings ladder in topological hybrid devices.

Contribution

It demonstrates how Majorana modes induce novel optical transitions and spectral features, reshaping the Jaynes-Cummings ladder in a hybrid quantum dot-cavity system.

Findings

Majorana modes cause new optical transitions in the system.

Reshaping of the Jaynes-Cummings ladder observed.

Satellite peaks depend on MBS overlap and localization.

Abstract

We study the optical properties of a hybrid device composed by a quantum dot (QD) resonantly coupled to a photonic mode of an optical microcavity and a Majorana nanowire: a topological superconducting segment hosting Majorana bound states (MBSs) at the opposite ends. In the regime of strong light-matter coupling, it is demonstrated that the leakage of the Majorana mode into the QD opens new optical transitions between polaritonic states formed due to hybridisation of material excitation with cavity photons, which leads to the reshaping of the Jaynes-Cummings ladder and can lead to the formation of a robust single-peak at cavity eigenfrequency in the emission spectrum. Moreover, weak satellite peaks in the low and high frequency regions are revealed for the distinct cases of highly isolated MBSs, overlapped MBSs and MBSs not well localized at the nanowire ends.