Engineering frequency-time quantum correlation of narrow-band biphotons from cold atoms

Young Wook Cho, Kwang Kyoon Park, Jong Chan Lee, Yoon Ho Kim

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


The nonclassical photon pair, generated via a parametric process, is naturally endowed with a specific form of frequency-time quantum correlations. Here, we report complete control of frequency-time quantum correlations of narrow-band biphotons generated via spontaneous four-wave mixing in a cold atomic ensemble. We have experimentally confirmed the generation of frequency-anticorrelated, frequency-correlated, and frequency-uncorrelated narrow-band biphoton states, as well as verifying the strong nonclassicality of the correlations. Our work opens up new possibilities for engineering narrow-band entangled photons for various quantum optical and quantum information applications.

Original languageEnglish
Article number063602
JournalPhysical review letters
Issue number6
Publication statusPublished - 2014 Aug 5

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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