Experimental Observation of the Ground-State Geometric Phase of Three-Spin XY Model

The geometric phase has become a fundamental concept in many fields of physics since it was revealed. Recently, the study of the geometric phase has attracted considerable attention in the context of quantum phase transition, where the ground state properties of the system experience a dramatic chan...

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Bibliographic Details
Published inChinese physics letters Vol. 33; no. 6; pp. 1 - 5
Main Author 周辉 李兆凯 王恒岩 陈宏伟 彭新华 杜江峰
Format Journal Article
LanguageEnglish
Published 01.06.2016
Subjects
XY模型
几何相位
基态性质
外部参数
多体系统
实验观察
核磁共振技术
自旋
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Summary:The geometric phase has become a fundamental concept in many fields of physics since it was revealed. Recently, the study of the geometric phase has attracted considerable attention in the context of quantum phase transition, where the ground state properties of the system experience a dramatic change induced by a variation of an external parameter. In this work, we experimentally measure the ground-state geometric phase of the three-spin XY model by utilizing the nuclear magnetic resonance technique. The experimental results indicate that the geometric phase could be used as a fingerprint of the ground-state quantum phase transition of many-body systems.
Bibliography:Hui Zhou, Zhao-Kai Li, Heng-Yan Wang, Hong-Wei Chen, Xin-Hua Peng, Jiang-Feng Du （1Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026;2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026 3 High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031）
11-1959/O4
The geometric phase has become a fundamental concept in many fields of physics since it was revealed. Recently, the study of the geometric phase has attracted considerable attention in the context of quantum phase transition, where the ground state properties of the system experience a dramatic change induced by a variation of an external parameter. In this work, we experimentally measure the ground-state geometric phase of the three-spin XY model by utilizing the nuclear magnetic resonance technique. The experimental results indicate that the geometric phase could be used as a fingerprint of the ground-state quantum phase transition of many-body systems.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/6/060301