主讲人：余雪佳 副教授（福州大学）

题目：Emergent self-duality in long range critical spin chain: from deconfined criticality to first order transition

时间：2023年10月19日（周四）上午10：00

地点：理工楼1215

联系人：钟寅

报告摘要：

Over the past few decades, tremendous efforts have been devoted to understanding self-duality at the quantum critical point, which enlarges the global symmetry and constrains the dynamics. In this letter, we employ large-scale density matrix renormalization group simulations to investigate the critical spin chain with long-range interaction V(r) \sim 1/r^{\alpha}. Remarkably, we reveal that the long-range interaction drives the deconfined criticality towards a first-order phase transition as \alpha decreases. More strikingly, the emergent self-duality leads to an emergent symmetry and manifests at these first-order critical points. This discovery is reminiscent of self-duality protected multicritical points and provides the example of the critical line with generalized symmetry. Our work has far-reaching implications for ongoing experimental efforts in Rydberg atom quantum simulators.

参考文献:

[1] Sheng Yang, Zhiming Pan, Da-Chuan Lu, and Xue-Jia Yu. arXiv:2309.01652.

[2] Xue-Jia Yu, Chengxiang Ding, and Limei Xu, Phys. Rev. E 107, 054122 (2023)

个人简介：

Xue-Jia Yu is an Associate professor at Fuzhou University. He earned the Ph.D. in Peking University with Prof. Limei Xu and a B.S. in Xiangtan University. He is interested in statistical physics related to the frontiers of quantum matter.