PT-symmetric optical potentials in a coherent atomic medium

Jiteng Sheng, Mohammad-Ali Miri, Demetrios N. Christodoulides, Min Xiao

We demonstrate that a coherently-prepared four-level atomic medium can provide a versatile platform for realizing parity-time (PT) symmetric optical potentials. Different types of PT-symmetric potentials are proposed by appropriately tuning the exciting optical fields and the pertinent atomic parameters. Such reconfigurable and controllable systems can open up new avenues in observing PT-related phenomena with appreciable gain/loss contrast in coherent atomic media.
Optics (physics.optics)

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