Universal topological marker

W Chen - Physical Review B, 2023 - APS
We elaborate that for topological insulators and topological superconductors described by
Dirac models in any dimension and symmetry class, the topological order can be mapped to …

Measurement of topological order based on metric-curvature correspondence

G von Gersdorff, W Chen - Physical Review B, 2021 - APS
A unified expression for topological invariants was proposed recently to describe the
topological order in Dirac models belonging to any dimension and symmetry class. We …

Mapping quantum geometry and quantum phase transitions to real space by a fidelity marker

MSM de Sousa, AL Cruz, W Chen - Physical Review B, 2023 - APS
The quantum geometry in the momentum space of semiconductors and insulators,
described by the quantum metric of the valence-band Bloch state, has been an intriguing …

Universality classes of topological phase transitions with higher-order band crossing

W Chen, AP Schnyder - New Journal of Physics, 2019 - iopscience.iop.org
In topological insulators and topological superconductors, the discrete jump of the
topological invariant upon tuning a certain system parameter defines a topological phase …

Correlation length, universality classes, and scaling laws associated with topological phase transitions

W Chen, M Legner, A Rüegg, M Sigrist - Physical Review B, 2017 - APS
The correlation functions related to topological phase transitions in inversion-symmetric
lattice models described by 2× 2 Dirac Hamiltonians are discussed. In one dimension, the …

Unconventional scaling at non-Hermitian critical points

R Arouca, CH Lee, C Morais Smith - Physical Review B, 2020 - APS
Critical phase transitions contain a variety of deep and universal physics and are intimately
tied to thermodynamic quantities through scaling relations. Yet, these notions are …

Multi-critical topological transition at quantum criticality

RR Kumar, YR Kartik, S Rahul, S Sarkar - Scientific Reports, 2021 - nature.com
The investigation and characterization of topological quantum phase transition between
gapless phases is one of the recent interest of research in topological states of matter. We …

Quench dynamics and scaling laws in topological nodal loop semimetals

K Sim, R Chitra, P Molignini - Physical Review B, 2022 - APS
We employ quench dynamics as an effective tool to probe different universality classes of
topological phase transitions. Specifically, we study a model encompassing both Dirac-like …

Generating quantum multicriticality in topological insulators by periodic driving

P Molignini, W Chen, R Chitra - Physical Review B, 2020 - APS
We demonstrate that the prototypical two-dimensional Chern insulator hosts exotic quantum
multicriticality in the presence of an appropriate periodic driving: a linear Dirac-like transition …

Fidelity susceptibility near topological phase transitions in quantum walks

S Panahiyan, W Chen, S Fritzsche - Physical Review B, 2020 - APS
The notion of fidelity susceptibility, introduced within the context of quantum metric tensor,
has been an important quantity to characterize the criticality near quantum phase transitions …