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Reflection and transmission in a neutron-spin test of the quantum Zeno effect
Machida, K; Nakazato, H; Pascazio, S; Rauch, H; Yu, S; Machida, K , Waseda Univ, Dept Phys, Tokyo 1698555, Japan.
1999
发表期刊PHYSICAL REVIEW A
ISSN1050-2947
卷号60期号:5页码:3448-3460
摘要The dynamics of a quantum system undergoing frequent "measurements," leading to the so-called quantum Zeno effect, is examined on the basis of a neutron-spin experiment recently proposed for its demonstration. Unlike in all previous studies, the spatial degrees of freedom of the neutron are duly taken into account. Their inclusion in the analysis is important for two reasons: first, neutron-reflection effects are shown to be very important; second, the evolution may rum out to be totally different from the ideal case. Our results can be interpreted in terms of a rigorous theorem due to Misra and Sudarshan: indeed we clarify that, in contrast with a widespread belief, a quantum Zeno effect does not halt the evolution of a quantum system; it rather modifies it, by forcing the system to remain in a certain subspace, defined by the very measurement performed. [S1050-2947(99)00811-2].
部门归属Waseda Univ, Dept Phys, Tokyo 1698555, Japan; Univ Bari, Dipartimento Fis, I-70126 Bari, Italy; Ist Nazl Fis Nucl, I-70126 Bari, Italy; Univ Vienna, Atominst, A-1020 Vienna, Austria; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Time Evolution Paradox Systems Storage Decay
学科领域Physics
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收录类别SCI
WOS记录号WOS:000083768800023
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13071
专题理论物理所SCI论文
通讯作者Machida, K , Waseda Univ, Dept Phys, Tokyo 1698555, Japan.
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Machida, K,Nakazato, H,Pascazio, S,et al. Reflection and transmission in a neutron-spin test of the quantum Zeno effect[J]. PHYSICAL REVIEW A,1999,60(5):3448-3460.
APA Machida, K,Nakazato, H,Pascazio, S,Rauch, H,Yu, S,&Machida, K , Waseda Univ, Dept Phys, Tokyo 1698555, Japan..(1999).Reflection and transmission in a neutron-spin test of the quantum Zeno effect.PHYSICAL REVIEW A,60(5),3448-3460.
MLA Machida, K,et al."Reflection and transmission in a neutron-spin test of the quantum Zeno effect".PHYSICAL REVIEW A 60.5(1999):3448-3460.
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