3 papers
cond-mat.mes-hall2025
The Quadrupole Moment of Higher-Order Topological Insulator at Finite temperature
Yiting Deng, Yan He
We study the higher-order topological insulators at finite temperature based on a generalized real-space quadrupole moment, which extends the ground state expectations to ensemble…
cond-mat.supr-con2025
Vortices in Two-Dimensional Chiral Superfluids
Yan He, Wenxing Nie
We study the orbital angular momentum (OAM) of two-dimensional chiral -wave superfluids (SFs) in the presence of an axisymmetric multiply quantized vortex (MQV…
cond-mat.quant-gas2025
The Uhlmann Phase Winding in Bose-Einstein Condensates at Finite Temperature
Chang-Yan Wang, Yan He
We investigate the Uhlmann phase, a generalization of the celebrated Berry phase, for Bose-Einstein condensates (BECs) at finite temperature. The Uhlmann phase characterizes topolo…