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Experimental demonstration on the quantum coherence evolution of two-mode squeezed state
As one of the most remarkable features of quantum mechanics, quantum coherence is regarded as an important quantum resource in the quantum information processing. The one-mode squeezed state and the two-mode squeezed state (Einstein-Podolsky-Rosen entangled states) as the most representative examples of nonclassical states both have quantum coherence. The squeezing property of the squeezed state is described by the variance of quadrature components and the positive partial transposition (PPT)doi:10.7498/aps.72.20221923 fatcat:e46t6ynidjf3hamjxqikli57om