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

• Main Authors: Vizvary, Samuel R, Wall, Zachary J, Boguslawski, Matthew J, Bareian, Michael, Derevianko, Andrei, Campbell, Wesley C, Hudson, Eric R
• Format: Journal Article
• Language: English
• Published: 16.10.2023
• Subjects: Physics - Atomic Physics; Physics - Quantum Physics
• DOI: 10.48550/arxiv.2310.10905

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.