Title
Crossing exceptional points without phase transition
Document Type
Article
Publication Date
1-15-2019
Abstract
We show that the theoretical framework linking exceptional points (EPs) to phase transitions in parity-time (PT) symmetric Hamiltonians is incomplete. Particularly, we demonstrate that the application of the squaring operator to a Jx PT lattice dramatically alter the topology of its Riemann surface, eventually resulting in a system that can cross an EP without undergoing a symmetry breaking. We elucidate on these rather surprising results by invoking the notion of phase diagrams in higher dimensional parameter space. Within this perspective, the canonical PT symmetry breaking paradigm arises only along certain projections of the Riemann surface in the parameter space.
Publication Title
Scienctific Reports
Recommended Citation
Zhong, Q.,
&
El-Ganainy, R.
(2019).
Crossing exceptional points without phase transition.
Scienctific Reports,
9.
http://doi.org/10.1038/s41598-018-36701-9
Retrieved from: https://digitalcommons.mtu.edu/physics-fp/154
Version
Publisher's PDF
Publisher's Statement
© The Author(s) 2019. Article deposited here in compliance with publisher policies. Publisher's version of record: https://doi.org/10.1038/s41598-018-36701-9