Hannah Price

Hannah Price

Theoretical Physics, University of Birmingham

Topological localization in time from parity-time symmetry

Published in Newton, 2026

Tom Sheppard, Carlos Camacho, Sebastian Weidemann, Alexander Szameit, Joshua Feis, Frank Schindler, Hannah M. Price
Newton 100622 (2026)

https://doi.org/10.1016/j.newton.2026.100622

https://arxiv.org/abs/2509.06679

We develop a framework for topologically protected localization at temporal interfaces without requiring periodic driving or a mapping to spatial topology. For parity-time-symmetric systems with two coupled modes or bands, suitable topologically distinct phases enforce temporal localization independently of spatial dimensionality. The framework accounts for existing observations, including photonic time crystals, and suggests further experimental platforms.