Combating dephasing decoherence by periodically performing tracking control and projective measurement
文献类型：期刊论文
| 作者 | Zhang, Ming1,2; Dai, Hong Yi3; Xi, Zairong2; Xie, Hong Wei1; Hu, Dewen1 |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2007-10-01 |
| 卷号 | 76期号:4页码:7 |
| ISSN号 | 1050-2947 |
| DOI | 10.1103/PhysRevA.76.042335 |
| 英文摘要 | We propose a scheme to overcome phase damping decoherence by periodically performing open loop tracking control and projective measurement. Although it is impossible to stabilize a qubit subject to Markovian dynamics only by open loop coherent control, one can attain a "softened" control goal with the help of periodical projective measurement. The "softened" control objective in our scheme is to keep the state of the controlled qubit to stay near a reference pure state with a high probability for a sufficiently long time. Two suboptimal control problems are given in the sense of trace distance and fidelity, respectively, and they are eventually reduced to the design of a period T. In our scheme, one can choose the period T as long as possible if the "softened" control goal is attained. This is in contrast to the observation that quantum Zeno effect takes place only if measurements are performed in a very frequent manner, i.e., the period T must be extremely small. |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000250619700078 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://ir.amss.ac.cn/handle/2S8OKBNM/4288]  |
| 专题 | 中国科学院数学与系统科学研究院 |
| 通讯作者 | Zhang, Ming |
| 作者单位 | 1.Natl Univ Def Technol, Coll Mechatron & Automat, Changsha 410073, Peoples R China 2.Chinese Acad Sci, Key Lab Syst & Control, Beijing 100080, Peoples R China 3.Natl Univ Def Technol, Coll Sci, Changsha 410073, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Ming,Dai, Hong Yi,Xi, Zairong,et al. Combating dephasing decoherence by periodically performing tracking control and projective measurement[J]. PHYSICAL REVIEW A,2007,76(4):7. |
| APA | Zhang, Ming,Dai, Hong Yi,Xi, Zairong,Xie, Hong Wei,&Hu, Dewen.(2007).Combating dephasing decoherence by periodically performing tracking control and projective measurement.PHYSICAL REVIEW A,76(4),7. |
| MLA | Zhang, Ming,et al."Combating dephasing decoherence by periodically performing tracking control and projective measurement".PHYSICAL REVIEW A 76.4(2007):7. |
入库方式： OAI收割
来源：数学与系统科学研究院
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