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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this article, we consider an interesting class of optical and othersystems in which the interaction or coupling makes the systems to be$\cal{PT}$-symmetric. We aim to compare their dynamical behaviors with that ofthe usual $\cal{PT}$ symmetric systems with intrinsic loss-gain terms. Inparticular, we focus on the interesting non-reciprocal nature of the $\cal{PT}$symmetric systems which has a promising application in optical diodes andoptical isolators. We check whether the non-reciprocal nature is common to all$\cal{PT}$ symmetric systems and, if not, what are the situations under whichit can be observed. Due to the recent interest in studying spontaneous symmetrybreaking in coupled waveguide systems, we here present such symmetry breakingbifurcations in certain reciprocal and non-reciprocal $\cal{PT}$ symmetricsystems.

Systems that become $\cal{PT}$ symmetric through interaction