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Generation of a non-zero discord bipartite state with classical second-order interference

2017; Optica Publishing Group; Volume: 25; Issue: 3 Linguagem: Inglês

10.1364/oe.25.002540

1094-4087

Yujun Choi, Kang-Hee Hong, Hyang‐Tag Lim, Jiwon Yune, Osung Kwon, Sang-Wook Han, Kyunghwan Oh, Yoon-Ho Kim, Yong‐Su Kim, Sung Moon,

Laser-Matter Interactions and Applications

We report investigation on quantum discord in classical second-order interference.In particular, we theoretically show that a bipartite state with D = 0.311 of discord can be generated via classical second-order interference.We also experimentally verify the theory by obtaining D = 0.197 ± 0.060 of non-zero discord state.Together with the fact that non-classicalities originated from physical constraints and information theoretic perspectives are not equivalent, this result provides an insight to understand the nature of quantum discord.