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In a parity-time (PT) symmetric photonic dimer structure, the authors analytically obtained the phase diagram with quantum jumps induced by loss and gain, defined a Hermitian exchange operator to characterize different PT phases, and engineered the quantum state and Hong-Ou-Mandel interferences. Their study paves the way for quantum state engineering, quantum interferences, and logic operations in non-Hermitian photonic systems.
Zhang et al. (Fri,) studied this question.
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