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题名: Quantifying Spontaneously Symmetry Breaking of Quantum Many-Body Systems
作者: Dong, GH ;  Fang, YN ;  Sun, CP
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2017
卷号: 68, 期号:4, 页码:405-411
关键词: spontaneous symmetry breaking ;  Bose-Einstein condensation ;  superconductor ;  group theory
学科分类: Physics
DOI: http://dx.doi.org/10.1088/0253-6102/68/4/405
通讯作者: Sun, CP (reprint author), Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China. ;  Sun, CP (reprint author), Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China.
文章类型: Article
英文摘要: Spontaneous symmetry breaking is related to the appearance of emergent phenomena, while a non-vanishing order parameter has been viewed as the sign of turning into such symmetry-breaking phase. We study the spontaneous symmetry breaking in the conventional superconductor and Bose Einstein condensation with a continuous measure of symmetry by showing that both the many-body systems can be mapped into the many spin model. We also formulate the underlying relation between the spontaneous symmetry breaking and the order parameter quantitatively. The degree of symmetry stays unity in the absence of the two emergent phenomena, while decreases exponentially at the appearance of the order parameter which indicates the inextricable relation between the spontaneous symmetry and the order parameter.
类目[WOS]: Physics, Multidisciplinary
关键词[WOS]: CLOCK SYNCHRONIZATION ;  ENTANGLEMENT ;  INFORMATION ;  ASYMMETRY ;  HELIUM ;  ORDER
项目资助者: National 973 Program [2014CB921403] ;  National Key Research and Development Program [2016YFA0301201] ;  National Natural Science Foundation of China [11421063, 11534002]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21955
Appears in Collections:理论物理所2017年知识产出_期刊论文

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Recommended Citation:
Dong, GH,Fang, YN,Sun, CP. Quantifying Spontaneously Symmetry Breaking of Quantum Many-Body Systems[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2017,68(4):405-411.
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