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 …
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 …
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 …
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 …
topological invariant upon tuning a certain system parameter defines a topological phase …
Correlation length, universality classes, and scaling laws associated with topological phase transitions
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 …
lattice models described by 2× 2 Dirac Hamiltonians are discussed. In one dimension, the …
Unconventional scaling at non-Hermitian critical points
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 …
tied to thermodynamic quantities through scaling relations. Yet, these notions are …
Multi-critical topological transition at quantum criticality
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 …
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 …
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 …
multicriticality in the presence of an appropriate periodic driving: a linear Dirac-like transition …
Fidelity susceptibility near topological phase transitions in quantum walks
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 …
has been an important quantity to characterize the criticality near quantum phase transitions …