Dynamical decoupling for realization of topological frequency conversion

TL;DR

This paper proposes a dynamical decoupling method to preserve topological phases in driven two-level systems, enabling the observation of topological frequency conversion despite experimental noise.

Contribution

It introduces a dynamical decoupling scheme that maintains topological phase transitions in noisy driven quantum systems, facilitating experimental realization.

Findings

Dynamical decoupling sustains topological phases under noise.

Enables observation of topological frequency conversion in solid state spins.

Proposes practical implementation in NV centers in diamond.

Abstract

The features of topological physics can manifest in a variety of physical systems in distinct ways. Periodically driven systems, with the advantage of high flexibility and controllability, provide a versatile platform to simulate many topological phenomena and may lead to novel phenomena that can not be observed in the absence of driving. Here we investigate the influence of realistic experimental noise on the realization of a two-level system under a two-frequency drive that induces topologically nontrivial band structure in the two-dimensional Floquet space. We propose a dynamical decoupling scheme that sustains the topological phase transition overcoming the influence of dephasing. Therefore, the proposal would facilitate the observation of topological frequency conversion in the solid state spin system, e.g. NV center in diamond.