Engineering Frequency-Time Quantum Correlation of Narrow-Band Biphotons from Cold Atoms
- Engineering Frequency-Time Quantum Correlation of Narrow-Band Biphotons from Cold Atoms
- 조영욱; K.-K. Park; J.-C. Lee; Y.-H. Kim
- Issue Date
- Physical review letters
- VOL 113, NO 6, 063602
- 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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