High fidelity electron shelving for cw and background free state detection in 171Yb+
Abstract
We present a method for improving state detection of 171Yb+ hyperfine qubits through dissipative shelving of one qubit state to the metastable 2F7/2o manifold. Narrowband optical pumping to the 2F7/2o state is accomplished on the 2S1/2 to 2D5/2 electric quadrupole transition. With an extremely long lifetime (∼ 5 years), shelved population is functionally disconnected from the detection cycle and off resonant effects during fluorescence detection are no longer limiting factors. We improve total state preparation and measurement fidelity in 171Yb+ to 0.9999. Additionally, the optical separation after electron shelving allows for implementation of a novel background free state detection technique with resonant mode locked laser pulses, increasing the signal to noise during detection by more than two orders of magnitude in the presence of considerable laser scatter.
ARO and NSF.- Publication:
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APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DMPD03007R