Expanding upon the omg architecture using narrow linewidth transitions in Yb⁺

A metastable 'm-type' qubit, as outlined in the omg architecture, can be defined on the hyperfine clock states in the ²F^o_7/2 manifold of ¹⁷¹Yb⁺. We propose utilizing the narrow NIR E2 transitions from ²F^o_7/2 to metastable high-J excited states to further expand the omg architecture on two axes. We plan to exploit one of these transitions to implement a two-qubit gate on the ²F^o_7/2 qubit, enabling entangling operations in the omg framework. We also define a new metastable qubit subspace within one of the high-J excited states, which would allow for metastable qubits to be operated in parallel with minimal decoherence.