Individual-Ion Addressing with Microwave Field Gradients
Ulrich Warring, C. Ospelkaus, Yves Colombe, Robert Jördens, Dietrich G. Leibfried, David J. Wineland · Physical Review Letters · 2013
Individual-qubit addressing is a prerequisite for many instances of quantum information processing. We demonstrate this capability on trapped-ion qubits with microwave near fields delivered by electrode structures integrated into a microfabricated surface-electrode trap. We describe four approaches that may be used in quantum information experiments with hyperfine levels as qubits. We implement individual control on two 25Mg+ ions separated by 4.3 μm and find spin-flip crosstalk errors on the order of 10(-3).