Non-Hermitian mobility edges in one-dimensional quasicrystals with parity-time symmetry
Non-Hermitian mobility edges in one-dimensional quasicrystals with parity-time symmetry
We investigate the localization-delocalization transition in one-dimensional non-Hermitian quasiperiodic lattices with exponential short-range hopping, which possess parity-time ($\mathcal{PT}$) symmetry. The localization transition induced by the non-Hermitian quasiperiodic potential is found to occur at the $\mathcal{PT}$-symmetry-breaking point. Our results also demonstrate the existence of energy-dependent mobility edges, which separate the extended …