Experimental study demonstrates state preparation, rotation, and high-fidelity readout in barium-137 ion qubits, highlighting versatile pathways for scalable trapped-ion quantum computing.
State preparation, qubit rotation, and high fidelity readout are demonstrated for two different ¹³⁷Ba⁺ qubit types. First, an optical qubit on the narrow 6S1/2 to 5D5/2 transition at 1.76 μm is implemented. Then, leveraging the techniques developed there for readout, a ground-state hyperfine qubit using the magnetically insensitive transition at 8 GHz is accomplished.
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Dietrich et al. (2010) studied this question.