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, 103 (9), 093902

Observation of PT-symmetry Breaking in Complex Optical Potentials

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Observation of PT-symmetry Breaking in Complex Optical Potentials

A Guo et al. Phys Rev Lett.

Abstract

In 1998, Bender and Boettcher found that a wide class of Hamiltonians, even though non-Hermitian, can still exhibit entirely real spectra provided that they obey parity-time requirements or PT symmetry. Here we demonstrate experimentally passive PT-symmetry breaking within the realm of optics. This phase transition leads to a loss induced optical transparency in specially designed pseudo-Hermitian guiding potentials.

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