Photon-mediated interactions by Floquet photonic lattices

TL;DR

This paper explores how time-periodic Floquet photonic lattices enable tunable and qualitatively different interactions between quantum emitters, revealing new possibilities in non-equilibrium quantum optics and photonics.

Contribution

It introduces a framework for understanding and controlling emitter interactions mediated by Floquet topological photonic lattices, highlighting novel tunable-range and frequency-dependent effects.

Findings

Bound states enable tunable-range interactions

Time-dependent baths produce qualitatively different regimes

Interactions depend on emitter frequency differences

Abstract

We investigate the interactions between two-level emitters mediated by time-dependent, one-dimensional, structured photonic baths, focusing on Floquet topological lattices. Building on the framework of periodically driven photonic lattices, we demonstrate and characterize the emergence of tunable-range emitter's interactions mediated by bound states absent in static photonic lattices. In particular, we show that one can not only obtain different spatial interaction dependencies with respect to the static bath scenarios, but also in qualitatively different regimes due to the time-dependent nature of the bath, for example, when the emitters have different frequencies. This work sheds light on the interplay between non-equilibrium photonics and quantum optics and can serve as the basis for analyzing Floquet photonic lattices in higher dimensions.