4 papers
Criticality on Rényi defects at (2+1) O(3) quantum critical points
Yanzhang Zhu, Zhe Wang, Meng Cheng +1
At a quantum critical point, the universal scaling behavior of Rényi entanglement entropy is controlled by the universality class of the codimension-two Rényi (or conical) defects…
Corner Charge Fluctuations and Many-Body Quantum Geometry
Xiao-Chuan Wu, Kang-Le Cai, Meng Cheng +1
In many-body systems with U(1) global symmetry, the charge fluctuations in a subregion reveal important insights into entanglement and other global properties. For subregions with…
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…
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…