3 papers
quant-ph2025
Stabilizer Perturbation Theory: A Systematic Construction via Schrieffer-Wolff Transformation
Xuzhe Ying, Kangle Li, Hoi Chun Po
Perturbation theories provide valuable insights on quantum many-body systems. Systems of interacting particles, like electrons, are often treated perturbatively around exactly solv…
cond-mat.str-el2025
Symmetry-enforced minimal entanglement and correlation in quantum spin chains
Kangle Li, Liujun Zou
The interplay between symmetry, entanglement and correlation is an interesting and important topic in quantum many-body physics. Within the framework of matrix product states, in t…
cond-mat.str-el2024
Quantum metric driven transition between superfluid and incoherent fluid
Xuzhe Ying, Kangle Li
We study the interplay between repulsive interaction and superfluidity in flat band system. We consider spatially indirect excitons in the Lieb lattice bilayer as an example. We sh…