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

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

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We report an 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 the nonclassicalities originated from physical constraints and information theoretic perspectives are not equivalent, this result provides an insight to understand the nature of quantum discord.

Original languageEnglish
Pages (from-to)2540-2551
Number of pages12
JournalOptics Express
Issue number3
Publication statusPublished - 2017 Feb 6

Bibliographical note

Funding Information:
ICT RandD programs of MSIP/IITP (B0101-16-1355, R0101-15-0060); National Research Foundation of Korea (2015K2A1B8047228, 2016R1A2A1A05005202); KIST Research Programs (2E27231, 2V05340, 2E26680-16-P024).

Publisher Copyright:
© 2017 Optical Society of America.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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