Observation of many-body quantum phase transitions beyond the Kibble-Zurek mechanism

• URL: http://arxiv.org/abs/2012.01734v3
• Date: Wed, 3 Nov 2021 02:35:35 GMT
• Title: Observation of many-body quantum phase transitions beyond the Kibble-Zurek mechanism
• Authors: Qi Huang, Ruixiao Yao, Libo Liang, Shuai Wang, Qinpei Zheng, Dingping Li, Wei Xiong, Xiaoji Zhou, Wenlan Chen, Xuzong Chen, Jiazhong Hu
• Abstract summary: We improve the band-mapping method to investigate the quantum phase transition from superfluid to Mott insulators. We observe the critical behaviors of quantum phase transitions in both dynamical steady-state-relaxation region and phase-oscillation region.
• Score: 4.911749334377798
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum critical behavior of many-body phase transitions is one of the most fascinating yet challenging questions in quantum physics. Here, we improved the band-mapping method to investigate the quantum phase transition from superfluid to Mott insulators, and we observed the critical behaviors of quantum phase transitions in both dynamical steady-state-relaxation region and phase-oscillation region. Based on various observables, two different values for the same quantum critical parameter are observed. This result is beyond a universal-scaling-law description of quantum phase transitions known as the Kibble-Zurek mechanism, and suggests that multiple quantum critical mechanisms are competing in many-body quantum phase transition experiments in inhomogeneous systems.

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