Dynamical suppression of stochastic dephasing of a qubit

被引：6
|
作者：
Ban, Masashi
Shibata, Fumiaki
Kitajima, Sachiko
机构：
[1] Hitachi Ltd, Adv Res Lab, Hatoyama, Saitama 3500395, Japan
[2] Japan Sci & Technol JST Agcy, CREST, Chuo Ku, Tokyo 1030028, Japan
[3] Ochanomizu Univ, Fac Sci, Dept Phys, Bunkyo Ku, Tokyo 1128610, Japan
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2007年 / 40卷 / 09期
关键词：
D O I：
10.1088/0953-4075/40/9/S15
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
It is shown that the stochastic dephasing of a qubit caused by the random frequency modulation in which the stochastic variable obeys the stationary Gauss-Markov process can be suppressed by applying a sequence of pi pulses to the qubit. It is found that the application of around ten pi pulses within the correlation time of the stochastic variable is enough to suppress the decoherence of the qubit. The recovery of the entanglement of the Werner state by means of pi pulses is also discussed.
引用
收藏
页码：S229 / S238
页数：10
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