摘要
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.
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.
基金
Supported by the National Key Basic Research Program under Grant Nos 2013CB921800 and 2014CB848700
the National Science Fund for Distinguished Young Scholars under Grant No 11425523
the National Natural Science Foundation of China under Grant Nos 11375167,11227901,91021005 and 11575173
the Strategic Priority Research Program(B)of the Chinese Academy of Sciences under Grant No XDB01030400
the Research Fund for the Doctoral Program of Higher Education of China under Grant No 20113402110044
the China Postdoctoral Science Foundation
the Fundamental Research Funds for the Central Universities
