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Scientists achieve ‘impossible task’ to control light while measuring trapped ion qubits
Researchers from the University of Waterloo have devised a way to precisely control the laser light used to manipulate qubits.
One of the most complex problems scientists face while working with quantum information is ensuring qubits remain protected. Even with perfect control over light, there is still a risk that these scattered photons could disturb the quantum states of nearby qubits, which limits how well we can protect them,” Rajibul Islam, senior study author and a professor at the University of Waterloo, said. “We demonstrate the feasibility of in-situ state-reset and state-measurement of trapped ions, achieving >99.9% fidelity in preserving an ‘asset’ ion-qubit while a neighboring ‘process’ qubit is reset, and >99.6% preservation fidelity while applying a detection beam for 11 μs on the same neighbor at a distance of 6 μm,” the study authors note.
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