Individual addressing of ions using magnetic field gradients in a surface-electrode ion trap

Wang, Shannon X.; Labaziewicz, Jaroslaw; Yufei Ge; Shewmon, Ruth; Chuang, Isaac L.
March 2009
Applied Physics Letters;3/2/2009, Vol. 94 Issue 9, pN.PAG
Academic Journal
A dense array of ions in microfabricated traps represents one possible way to scale up ion trap quantum computing. The ability to address individual ions is an important component of such a scheme. We demonstrate individual addressing of trapped ions in a microfabricated surface-electrode trap using a magnetic field gradient generated on-chip. A frequency splitting of 310(2) kHz for two ions separated by 5 μm is achieved. Selective single qubit operations are performed on one of two trapped ions with an average of 2.2(±1.0%) crosstalk. Coherence time is reduced by the magnetic field gradient, but the spin-echo technique effectively restores the coherence time.


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