irreversibilityofaquantumwalkinducedbycontrollabledecoherenceemployingrandomunitaryoperations
文献类型：期刊论文
| 作者 | Xu Youyang1; Zhou Fei2; Chen Liang2; Xie Yi2; Xue Peng3; Feng Mang2 |
| 刊名 | chinesephysicsb
 |
| 出版日期 | 2012 |
| 卷号 | 21期号:4页码:040304 |
| ISSN号 | 1674-1056 |
| 英文摘要 | Quantum walk is different from random walk in reversibility and interference. Observation of the reduced re- versibility in a realistic quantum walk is of scientific interest in understanding the unique quantum behavior. We propose an idea to experimentally investigate the decoherence-induced irreversibility of quantum walks with trapped ions in phase space via the average fidelity decay. By introducing two controllable decoherence sources, i.e., the phase damping channel (i.e., dephasing) and the high temperature amplitude reservoir (i.e., dissipation), in the intervals between the steps of quantum walk, we find that the high temperature amplitude reservoir shows more detrimental effects than the phase damping channel on quantum walks. Our study also shows that the average fidelity decay works better than the position variance for characterizing the transition from quantum walks to random walk. Experimental feasibility to monitor the irreversibility is justified using currently available techniques. |
| 语种 | 英语 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/17765]  |
| 专题 | 中国科学院武汉物理与数学研究所 |
| 作者单位 | 1.昆明理工大学 2.中国科学院武汉物理与数学研究所 3.东南大学 |
| 推荐引用方式 GB/T 7714 | Xu Youyang,Zhou Fei,Chen Liang,et al. irreversibilityofaquantumwalkinducedbycontrollabledecoherenceemployingrandomunitaryoperations[J]. chinesephysicsb,2012,21(4):040304. |
| APA | Xu Youyang,Zhou Fei,Chen Liang,Xie Yi,Xue Peng,&Feng Mang.(2012).irreversibilityofaquantumwalkinducedbycontrollabledecoherenceemployingrandomunitaryoperations.chinesephysicsb,21(4),040304. |
| MLA | Xu Youyang,et al."irreversibilityofaquantumwalkinducedbycontrollabledecoherenceemployingrandomunitaryoperations".chinesephysicsb 21.4(2012):040304. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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