English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Non-Hermitian skin effect and critical skin effect are unique features ofnon-Hermitian systems. In this Letter, we study an open system with itsdynamics of single-particle correlation function effectively dominated by anon-Hermitian damping matrix, which exhibits $\mathbb{Z}_2$ skin effect, anduncover the existence of a novel phenomenon of helical damping. When addingperturbations that break anomalous time reversal symmetry to the system, thecritical skin effect occurs, which causes the disappearance of the helicaldamping in the thermodynamic limit although it can exist in small size systems.We also demonstrate the existence of anomalous critical skin effect when wecouple two identical systems with $\mathbb{Z}_2$ skin effect. With the help ofnon-Bloch band theory, we unveil that the change of generalized Brillouin zoneequation is the necessary condition of critical skin effect.

Helical damping and anomalous critical non-Hermitian skin effect