@article{elganainy2018,
  title={Non-Hermitian physics and PT symmetry},
  author={Ramy El‐Ganainy and Konstantinos G. Makris and Mercedeh Khajavikhan and Ziad H. Musslimani and Stefan Rotter and Demetrios N. Christodoulides},
  year={2018},
  journal={Nature Physics},
  doi={10.1038/nphys4323},
  url={https://doi.org/10.1038/nphys4323}
}