# Synthetic clock transitions via continuous dynamical decoupling

## TL;DR

This paper demonstrates the creation of synthetic clock transitions in a spin-1 Bose-Einstein condensate using continuous dynamical decoupling, significantly reducing sensitivity to environmental noise and control fluctuations, advancing quantum simulation capabilities.

## Contribution

It introduces a method to generate synthetic clock transitions in cold atoms, enhancing coherence and robustness against noise beyond naturally occurring transitions.

## Key findings

- Up to four orders of magnitude reduction in magnetic field noise sensitivity.
- Demonstration of suppression of control field fluctuations.
- Potential applications in quantum magnetism and topological matter.

## Abstract

Decoherence of quantum systems due to uncontrolled fluctuations of the environment presents fundamental obstacles in quantum science. `Clock' transitions which are insensitive to such fluctuations are used to improve coherence, however, they are not present in all systems or for arbitrary system parameters. Here, we create a trio of synthetic clock transitions using continuous dynamical decoupling in a spin-1 Bose-Einstein condensate in which we observe a reduction of sensitivity to magnetic field noise of up to four orders of magnitude; this work complements the parallel work by Anderson et al. (submitted, 2017). In addition, using a concatenated scheme, we demonstrate suppression of sensitivity to fluctuations in our control fields. These field-insensitive states represent an ideal foundation for the next generation of cold atom experiments focused on fragile many-body phases relevant to quantum magnetism, artificial gauge fields, and topological matter.