10 papers
Topological Charge-2ne Superconductors
Zhi-Qiang Gao, Yan-Qi Wang, Hui Yang +1
Charge- superconductors are phases where quartets of electrons condense in the absence of Cooper pairing condensation. They exhibit distinctive signatures including fractional…
Effective Theory of Fermion Quartet Condensation
Qiao-Ru Xu, Congjun Wu
We develop a theory of superconductivity (or superfluidity) based on condensed fermion quartets focusing on the dilute spin- systems at zero temperature. In the spirit…
Two-Dimensional Space-Time Groups: Classification and Applications
Chenhang Ke, Congjun Wu
The concept of space group has long served as the fundamental framework to describe the physical properties of crystalline materials, from electronic bands to photonic dispersions.…
Collective Nuclear Polaritons with Coherent and Tunable Excitation Dynamics
Liufeng Yang, Jinling Wang, Huijun Li +3
We propose collective nuclear polaritons formed by hybridizing a 229Th nuclear ensemble with a vacuum-ultraviolet cavity mode generated via four-wave mixing, achieving a collective…
Kinetic Energy Driven Ferromagnetic Insulator
Jinyuan Ye, Yuchi He, Congjun Wu
We construct a minimal model of interacting fermions establishing a ferromagnetic insulating phase. It is based on the Hubbard model on a trimerized triangular lattice in the regim…
Incompressible quantum liquid on the four-dimensional sphere
Junwen Zhao, Xue Meng, Wei Zhu +1
The study of quantum Hall effect (QHE) is a foundation of topological physics, inspiring extensive explorations of its high-dimensional generalizations. Notably, the four dimension…