A mechanism for asymmetric transport which is based on parity-time- symmetric nonlinearities is presented. We show that in contrast to the case of conservative nonlinearities, an increase of the complementary conductance strength leads to a simultaneous increase of asymmetry and transmittance intensity. We experimentally demonstrate the phenomenon using a pair of coupled Van der Pol oscillators as a reference system, each with complementary anharmonic gain and loss conductances, connected to transmission lines. An equivalent optical setup is also proposed. Â© 2013 American Physical Society.
N. Bender, et. al., (2013) Observation of asymmetric transport in structures with active nonlinearities.Physical Review Letters110:23. DOI: http://doi.org/10.1103/PhysRevLett.110.234101
Physical Review Letters