Phase transitions of wave packet dynamics in disordered non-Hermitian systems

Journal article (2024)

Authors

H. Spring Kavli institute of nanoscience Delft, QN/Akhmerov Group - AS
Viktor Könye IFW Dresden
F.A. Gerritsma Kavli institute of nanoscience Delft, QN/vanderSarlab - AS
Ion Cosma Fulga IFW Dresden
A.R. Akhmerov Kavli institute of nanoscience Delft, QN/Akhmerov Group - AS
Research Group
QN/vanderSarlab (AS) (TU Delft)
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Published Date

2024

Language

English

Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/vanderSarlab

Abstract

Disorder can localize the eigenstates of one-dimensional non-Hermitian systems, leading to an Anderson transition with a critical exponent of 1. We show that, due to the lack of energy conservation, the dynamics of individual, real-space wave packets follows a different behavior. Both transitions between localization and unidirectional amplification, as well as transitions between distinct propagating phases become possible. The critical exponent of the transition is close to 1/2 in propagating-propagating and (de)localization transitions.