Dynamically Induced Exceptional Phases in Quenched Interacting Semimetals
Mesoscale and Nanoscale Physics
2021-09-08 v1 Quantum Gases
Strongly Correlated Electrons
Quantum Physics
Abstract
We report on the dynamical formation of exceptional degeneracies in basic correlation functions of non-integrable one- and two-dimensional systems quenched to the vicinity of a critical point. Remarkably, fine-tuned semi-metallic points in the phase diagram of the considered systems are thereby promoted to topologically robust non-Hermitian (NH) nodal phases emerging in the coherent long-time evolution of a dynamically equilibrating system. In the framework of non-equilibrium Green's function methods within the conserving second Born approximation, we predict observable signatures of these novel NH nodal phases in simple spectral functions as well as in the time-evolution of momentum distribution functions.
Cite
@article{arxiv.2103.12079,
title = {Dynamically Induced Exceptional Phases in Quenched Interacting Semimetals},
author = {Carl Lehmann and Michael Schüler and Jan Carl Budich},
journal= {arXiv preprint arXiv:2103.12079},
year = {2021}
}