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PT-symmetry breaking in multilayers with resonant loss and gain locks light propagation direction. (arXiv:1808.07477v1 [physics.optics]) http://arxiv.org/abs/1808.07477
PT-symmetry breaking in multilayers with resonant loss and gain locks light propagation direction. (arXiv:1808.07477v1 [physics.optics]) http://arxiv.org/abs/1808.07477