Dynamics of quantum zeno and anti-zeno effects in an open system
文献类型：期刊论文
| 作者 | Sun, CP ; Zhang, P
|
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2014 |
| 卷号 | 57期号:2页码:194-207 |
| 关键词 | PROJECTION POSTULATE PARADOX COLLAPSE DECAY ATOM |
| ISSN号 | 1674-7348 |
| 通讯作者 | Sun, CP (reprint author), Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China. |
| 英文摘要 | We provide a general dynamical approach for the quantum Zeno and anti-Zeno effects in an open quantum system under repeated non-demolition measurements. In our approach the repeated measurements are described by a general dynamical model without the wave function collapse postulation. Based on that model, we further study both the short-time and long-time evolutions of the open quantum system under repeated non-demolition measurements, and derive the measurement-modified decay rates of the excited state. In the cases with frequent ideal measurements at zero-temperature, we re-obtain the same decay rate as that from the wave function collapse postulation (Nature, 2000, 405: 546). The correction to the ideal decay rate is also obtained under the non-ideal measurements. Especially, we find that the quantum Zeno and anti-Zeno effects are possibly enhanced by the non-ideal natures of measurements. For the open system under measurements with arbitrary period, we generally derive the rate equation for the long-time evolution for the cases with arbitrary temperature and noise spectrum, and show that in the long-time evolution the noise spectrum is effectively tuned by the repeated measurements. Our approach is also able to describe the quantum Zeno and anti-Zeno effects given by the phase modulation pulses, as well as the relevant quantum control schemes. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [11074305, 10935010, 11074261, 11121403]; National Basic Research Program of China [2012CB922104, 2014CB921402] |
| 原文出处 | http://dx.doi.org/10.1007/s11433-013-5377-x |
| 语种 | 英语 |
| WOS记录号 | WOS:000329997700002 |
| 公开日期 | 2014-04-25 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15489]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Sun, CP,Zhang, P. Dynamics of quantum zeno and anti-zeno effects in an open system[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2014,57(2):194-207. |
| APA | Sun, CP,&Zhang, P.(2014).Dynamics of quantum zeno and anti-zeno effects in an open system.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,57(2),194-207. |
| MLA | Sun, CP,et al."Dynamics of quantum zeno and anti-zeno effects in an open system".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 57.2(2014):194-207. |
入库方式： OAI收割
来源：理论物理研究所
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