Collaborators: Zhi-Xuan Li, Shuai Yin, Zi-Xiang Li
We propose a theoretical framework that pins down ground-state phase diagrams and quantum criticality before the notorious fermion sign problem even sets in. Building on this idea, we solve the ground-state phase diagram of the SU(3) Hubbard model for the first time and uncover a new universality class.
Paper: arXiv preprint
Talks: Slides (Hangzhou, Nov 2024) | Poster (Xi'an, Apr 2024)
Undergraduate thesis: Thesis: Studies of sign problems in nonequilibrium quantum criticality | Defense slides | Defense recording
Collaborators: Zhi Zeng, Yu-Rong Shu, Zi-Xiang Li, Shuai Yin
Exploring quantum criticality of strongly correlated fermions, a formidable challenge in modern condensed matter physics, has never been approached from a nonequilibrium perspective until now. We pioneer this exploration in Dirac systems, revealing rich nonequilibrium critical phenomena and a universal scaling theory. We unveil new critical initial slip exponent, challenging existing paradigms of quantum criticality. We propose a groundbreaking theoretical framework for studying nonequilibrium quantum criticality in fermionic systems. Our work initiates a novel direction of strongly correlated fermions studies: nonequilibrium quantum criticality. These insights will inspire a series of nonequilibrium theoretical studies and may catalyze experiments in quantum computers.
Collaborators: Zhi Zeng, Zi-Xiang Li, Shuai Yin