defect lines 1o(3) model 1quantum criticality 1quantum Monte Carlo 1renyi entropy 1surface criticality 1
From the 1 of 3 linked papers with an AI index.
3 papers
cond-mat.str-el2026
Criticality on Rényi defects at (2+1) O(3) quantum critical points
Yanzhang Zhu, Zhe Wang, Meng Cheng +1
The paper uses large-scale quantum Monte Carlo simulations to study Rényi defect lines at (2+1)d O(3) quantum critical points, revealing multiple defect universality classes (ordin…
cond-mat.str-el2025
Disorder operators in two-dimensional Fermi and non-Fermi liquids through multidimensional bosonization
Kang-Le Cai, Meng Cheng
Disorder operators are a type of non-local observables for quantum many-body systems, measuring the fluctuations of symmetry charges inside a region. It has been shown that disorde…
cond-mat.str-el2025
Universal contributions to charge fluctuations in spin chains at finite temperature
Kang-Le Cai, Meng Cheng
At finite temperature, conserved charges undergo thermal fluctuations in a quantum many-body system in the grand canonical ensemble. The full structure of the fluctuations of the t…