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题名: Quantum leakage of collective excitations of atomic ensemble induced by spatial motion
作者: Li, Y ;  Yi, S ;  You, L ;  Sun, CP
刊名: SCIENCE IN CHINA SERIES G-PHYSICS ASTRONOMY
出版日期: 2003
卷号: 46, 期号:6, 页码:580-588
关键词: ELECTROMAGNETICALLY INDUCED TRANSPARENCY ;  PODOLSKY-ROSEN CHANNELS ;  STATE ;  TELEPORTATION ;  ENTANGLEMENT ;  COMPUTATION
学科分类: Physics
通讯作者: Li, Y , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
英文摘要: We generalize the conception of quantum leakage for the atomic collective excitation states. By making use of the atomic coherence state approach, we study the influence of the atomic spatial motion on the symmetric collective states of 2-level atomic ensemble due to inhomogeneous coupling. In the macroscopic limit, we analyze the quantum decoherence of the collective atomic state by calculating the quantum leakage for a very large ensemble at a finite temperature. Our investigations show that the fidelity of the atomic system will not be good in the case of atom number N --> infinity. Therefore, quantum leakage is an inevitable problem in using the atomic ensemble as a quantum information memory. The detailed calculations shed theoretical light on quantum processing using atomic ensemble collective qubit.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000187496600003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14176
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li, Y,Yi, S,You, L,et al. Quantum leakage of collective excitations of atomic ensemble induced by spatial motion[J]. SCIENCE IN CHINA SERIES G-PHYSICS ASTRONOMY,2003,46(6):580-588.
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