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<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="script">PT</mml:mi></mml:mrow></mml:math>-symmetric oligomers: Analytical solutions, linear stability, and nonlinear dynamics
In the present work we focus on the case of (few-site) configurations respecting the parity-time ($\mathcal{PT}$) symmetry, i.e., with a spatially odd gain-loss profile. We examine the case of such ``oligomers'' with not only two sites, as in earlier works, but also the cases of three and four sites. While …