Observation of many-body quantum phase transitions beyond the Kibble-Zurek mechanism
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.
Keywords
Cite
@article{arxiv.2012.01734,
title = {Observation of many-body quantum phase transitions beyond the Kibble-Zurek mechanism},
author = {Qi Huang and Ruixiao Yao and Libo Liang and Shuai Wang and Qinpei Zheng and Dingping Li and Wei Xiong and Xiaoji Zhou and Wenlan Chen and Xuzong Chen and Jiazhong Hu},
journal= {arXiv preprint arXiv:2012.01734},
year = {2021}
}
Comments
6 pages, 4 figures for main text