Southwest Quantum Information and Technology

Metastable qubit operations in \(\text{Yb}^{+}\)

Presenting Author: Patrick McMillin, University of California, Los Angeles
Contributing Author(s): Thomas Dellaert, Hassan Farhat, Wesley Campbell

The metastable ("\(m\)-type") qubit defined on the zero-field hyperfine clock states in the long-lived \(^{2}\mathrm{F}_{7/2}^o\) manifold in \(^{171}\mathrm{Yb}^+\) gives a promising pathway to low cross-talk, high fidelity multi-qubit operations using the same ion species via the recently proposed "\(omg\) blueprint" for atomic quantum processing. We describe heralded state preparation, single qubit operations, and state measurement in the \(m\)-type qubit, achieving a SPAM infidelity of \(4^{+3}_{-2}\times 10^{-4}\) and provide empirical, quantitative limits on the effect of direct illumination by ground state ("\(g\)-type") qubit light. Additionally, we report our progress on spectroscopy, trapping and cooling of \(^{173}\mathrm{Yb}^{+}\), which will have six long-lived \(m\)-type hyperfine clock states at zero field.

Read this article online: https://doi.org/10.1103/PhysRevA.104.L060402

(Session 5 : Thursday from 5:00 pm - 7:00 pm)