Experimental observation of the dual behavior of PT -symmetric scattering
نویسندگان
چکیده
We investigate experimentally parity-time (PT ) symmetric scattering using LRC circuits in an inductively coupled PT -symmetric pair connected to transmission line leads. In the single-lead case, the PT -symmetric circuit acts as a simple dual device—an amplifier or an absorber depending on the orientation of the lead. When a second lead is attached, the system exhibits unidirectional transparency for some characteristic frequencies. This nonreciprocal behavior is a consequence of generalized (nonunitary) conservation relations satisfied by the scattering matrix.
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