3 papers
cond-mat.str-el2026
Nullspace-guided Adaptive Bootstrap of Quantum Many-body Systems
Xu-Cheng Wang, Yang Qi
We introduce a nullspace-guided adaptive (NGA) bootstrap method that improves the energy lower bounds of quantum many-body ground states by refining the bootstrap basis in a dynami…
cond-mat.str-el2026
Quantum geometric localization length and localization criticality in an ideally flat Chern band
Xu-Cheng Wang, Yang Qi
We propose that the localization length in an isolated, ideally flat Chern band is set by quantum geometry. We explore the corresponding localization transition and its critical sc…
cond-mat.supr-con2026
Emergent magnetic pseudogap from phase fluctuations and hierarchy of scales in two-dimensional superconductors
Xu-Cheng Wang, Yang Qi
Preformed pairs and phase fluctuations are believed to play a vital role in predicting the charge pseudogap in the normal state of two-dimensional superconductors. In this work, we…