3 papers
cond-mat.mes-hall2026
Non-chiral ephemeral edge states and cascading of exceptional points in the non-reciprocal Haldane model
Aditi A. Prabhudesai, H. S. Chhabra, Suraj S. Hegde
We study a variant of the Haldane honeycomb model that has non-reciprocal hoppings between the next-nearest neighbours. The system on a torus hosts time-reversal symmetry protected…
cond-mat.mes-hall2025
Quantum geometry in the dynamics of band-projected operators
Chen Xu, Andreas Haller, Suraj Hegde +2
We study the dynamics of electrons in crystalline solids in the presence of inhomogeneous external electric and magnetic fields. We present a manifestly gauge-invariant operator-ba…
cond-mat.mes-hall2025
Chiral damping with persistent edge states: interplay of spectral topology and band topology in open quantum systems
Ronika Sarkar, Suraj S. Hegde, Awadhesh Narayan +1
We study the dynamical consequences of combining the non-Hermitian skin effect with topological edge states. Focusing on the paradigmatic dissipative Hofstadter model, we find that…