Non-Hermitian physics and PT symmetry

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Non-Hermitian Chern Bands. (2018, neutral): “This Hamiltonian is “η-pseudo-Hermitian” [94,95] (not PT-symmetric [38,58]), namely, it satisfies η−1H†η 1⁄4 H, where η is the direct product of spatial inversion and σz:”
Entanglement Phase Transition Induced by the Non-Hermitian Skin Effect (2022, background): “As another platform of open systems, the physics effectively described by non-Hermitian Hamiltonians has recently attracted growing interest [27, 28].”
Exceptional topology of non-Hermitian systems (2019, background): “trum of physical platforms ranges from classical systems, including optical settings, electrical circuits, and mechanical systems, which may be mapped to an effective NH Schrdinger equation, all the way to quantum materials (Bender, 2007; Datta, 2005; El-Ganainy et al., 2018; Miri and Alù, 2019; Oza”
Symmetry-protected nodal phases in non-Hermitian systems (2018, background): “cal situations, ranging from quasi-particles with a finite lifetime in strongly correlated solids to arrays of optical resonators subject to gain and loss [7, 45, 46].”
Edge States and Topological Invariants of Non-Hermitian Systems. (2018, neutral): “[43] Ramy El-Ganainy, Konstantinos G Makris, Mercedeh Khajavikhan, Ziad H Musslimani, Stefan Rotter, and Demetrios N Christodoulides, “Non-hermitian physics and pt symmetry,” Nature Physics 14, 11 (2018).”