Random decoupling schemes for quantum dynamical control and error suppression

被引：144
作者：
Viola, L [1 ]
Knill, E [1 ]
机构：
[1] Natl Inst Stand & Technol, Boulder, CO 80305 USA
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.94.060502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a general control-theoretic framework for constructing and analyzing random decoupling schemes, applicable to quantum dynamical control of arbitrary finite-dimensional composite systems. The basic idea is to design the control propagator according to a random rather than deterministic path on a group. We characterize the performance of random decoupling protocols, and identify control scenarios where they can significantly weaken time scale requirements as compared to cyclic counterparts. Implications for reliable quantum computation are discussed.
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页数：4
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