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Decay of Loschmidt echo enhanced by quantum criticality
Quan, HT; Song, Z; Liu, XF; Zanardi, P; Sun, CP; Quan, HT , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
2006
发表期刊PHYSICAL REVIEW LETTERS
ISSN0031-9007
卷号96期号:14页码:-
摘要We study the transition of a quantum system S from a pure state to a mixed one, which is induced by the quantum criticality of the surrounding system E coupled to it. To characterize this transition quantitatively, we carefully examine the behavior of the Loschmidt echo (LE) of E modeled as an Ising model in a transverse field, which behaves as a measuring apparatus in quantum measurement. It is found that the quantum critical behavior of E strongly affects its capability of enhancing the decay of LE: near the critical value of the transverse field entailing the happening of quantum phase transition, the off-diagonal elements of the reduced density matrix describing S vanish sharply.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; Peking Univ, Dept Math, Beijing 100871, Peoples R China; Inst Sci Interchange Fdn, I-10133 Turin, Italy
关键词Decoherence Model Transition Reduction Collapse
学科领域Physics
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收录类别SCI
WOS记录号WOS:000236797200009
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被引频次:399[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/6003
专题理论物理所1978-2010年知识产出
通讯作者Quan, HT , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
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GB/T 7714
Quan, HT,Song, Z,Liu, XF,et al. Decay of Loschmidt echo enhanced by quantum criticality[J]. PHYSICAL REVIEW LETTERS,2006,96(14):-.
APA Quan, HT,Song, Z,Liu, XF,Zanardi, P,Sun, CP,&Quan, HT , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.(2006).Decay of Loschmidt echo enhanced by quantum criticality.PHYSICAL REVIEW LETTERS,96(14),-.
MLA Quan, HT,et al."Decay of Loschmidt echo enhanced by quantum criticality".PHYSICAL REVIEW LETTERS 96.14(2006):-.
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