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Experimental investigation of planar ion traps

2006; American Physical Society; Volume: 73; Issue: 3 Linguagem: Inglês

10.1103/physreva.73.032307

1538-4446

C. E. Pearson, David R. Leibrandt, Waseem Bakr, William Mallard, Kenneth R. Brown, Isaac L. Chuang,

Quantum Information and Cryptography

Chiaverini et al. [Quantum Inf. Comput. 5, 419 (2005)] recently suggested a linear Paul trap geometry for ion-trap quantum computation that places all of the electrodes in a plane. Such planar ion traps are compatible with modern semiconductor fabrication techniques and can be scaled to make compact, many-zone traps. In this paper we present an experimental realization of planar ion traps using electrodes on a printed circuit board to trap linear chains of tens of charged particles of $0.44\phantom{\rule{0.3em}{0ex}}\mathrm{\ensuremath{\mu}}\mathrm{m}$ diameter in a vacuum of $15\phantom{\rule{0.3em}{0ex}}\mathrm{Pa}\phantom{\rule{0.3em}{0ex}}({10}^{\ensuremath{-}1}\phantom{\rule{0.3em}{0ex}}\mathrm{torr})$. With these traps we address concerns about the low trap depth of planar ion traps and develop control electrode layouts for moving ions between trap zones without facing some of the technical difficulties involved in an atomic ion-trap experiment. Specifically, we use a trap with 36 zones (77 electrodes) arranged in a cross to demonstrate loading from a traditional four-rod linear Paul trap, linear ion movement, splitting and joining of ion chains, and movement of ions through intersections. We further propose an additional dc-biased electrode above the trap which increases the trap depth dramatically, and a planar ion-trap geometry that generates a two-dimensional lattice of point Paul traps.