Parity‐Time‐Symmetric Optical Lattice with Alternating Gain and Loss Atomic Configurations
Parity‐Time‐Symmetric Optical Lattice with Alternating Gain and Loss Atomic Configurations
Since the spatially extended periodic parity-time (PT) symmetric potential can possess certain unique properties compared to a single PT cell (with only a pair of coupled gain-loss components), various schemes have been proposed to realize periodic PT-symmetric potentials based on optical lattices. Here, we experimentally construct a spatially periodic PT-symmetric …