Elliptical ion traps and trap arrays for quantum computation

被引:45
作者
DeVoe, RG [1 ]
机构
[1] IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA
来源
PHYSICAL REVIEW A | 1998年 / 58卷 / 02期
关键词
D O I
10.1103/PhysRevA.58.910
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The properties of a rf quadrupole trap, the elliptical ion trap, are derived. Elliptical traps can confine large numbers of ions in the Lamb-Dicke regime due to a hitherto unrecognized mechanism unique to one-dimensional Coulomb crystals, implicit in the theories of Dubin and Schiffer. This follows from a linear crystal stability condition, which uniquely relates the crystal size to ellipticity, and a micromotion relation, which reveals a 1/5-root dependence on the number of trapped ions. Elliptical traps offer several advantages over linear traps in the Cirac-Zoller model of quantum computing, both for initial tests and as a potential method of creating a full-scale quantum computer. Numerical solutions of a one-electrode structure show that microscopic elliptical traps, each containing approximate to 100 ions, can be constructed at a density of 100 traps/cm(2), making possible arrays containing >10(6) ions in the Lamb-Dicke regime for precision spectroscopy or quantum computation. [S1050-2947(98)08008-1].
引用
收藏
页码:910 / 914
页数:5
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