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Updated: Apr 25, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Engineering frequency-time quantum correlation of narrow-band biphotons from cold atoms
Young-Wook Cho1, Kwang-Kyoon Park1, Jong-Chan Lee1
1Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea.
Abstract:
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.
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