Non-Hermiticity is usually considered detrimental to quasiparticle physics. Here, the authors show that such an assumption of Hermiticity can be lifted in the context of a lattice model containing two non-Hermitian Dirac cones, with one hosting amplifying Dirac quasiparticles and the other hosting decaying ones.
- Xinrong Xie
- Fei Ma
- Haoran Xue