# Mixed Dynamical Decoupling

## TL;DR

This paper introduces a mixed dynamical decoupling scheme combining continuous and pulsed sequences to enhance qubit coherence and sensing robustness in quantum systems.

## Contribution

It presents a novel hybrid decoupling method that outperforms standard techniques by combining continuous driving with phased pulse sequences.

## Key findings

- MDD outperforms standard concatenated continuous dynamical decoupling in NV centers.
- The scheme improves robustness to environmental noise and field fluctuations.
- Potential applications in enhanced quantum sensing.

## Abstract

We propose a scheme for mixed dynamical decoupling (MDD), where we combine continuous dynamical decoupling with robust sequences of phased pulses. Specifically, we use two fields for decoupling, where the first continuous driving field creates dressed states that are robust to environmental noise. Then, a second field implements a robust sequence of phased pulses to perform inversions of the dressed qubits, thus achieving robustness to amplitude fluctuations of both fields. We show that MDD outperforms standard concatenated continuous dynamical decoupling in realistic numerical simulations for dynamical decoupling in NV centers in diamond. Finally, we also demonstrate how our technique can be utilized for improved sensing.