# Eliminating qubit type cross-talk in the $\textit{omg}$ protocol

**Authors:** Samuel R. Vizvary, Zachary J. Wall, Matthew J. Boguslawski, Michael Bareian, Andrei Derevianko, Wesley C. Campbell, Eric R. Hudson  
**arXiv:** [2310.10905](https://arxiv.org/abs/2310.10905)  
**Date:** 2023-10-17  
**Summary page:** https://www.summarizepaper.com/fr/arxiv-id/2310.10905v1/

## Abstract

The $\textit{omg}$ protocol is a promising paradigm that uses multiple, application-specific qubit subspaces within the Hilbert space of each single atom during quantum information processing. A key assumption for $\textit{omg}$ operation is that a subspace can be accessed independently without deleterious effects on information stored in other subspaces. We find that intensity noise during laser-based quantum gates in one subspace can cause decoherence in other subspaces, potentially complicating $\textit{omg}$ operation. We show, however, that a magnetic-field-induced vector light shift can be used to eliminate this source of decoherence. As this technique requires simply choosing a certain, magnetic field dependent, polarization for the gate lasers it is straightforward to implement and potentially helpful for $\textit{omg}$ based quantum technology.