Experimental Demonstration of Quantum Stationary Light Pulses in an Atomic Ensemble

Kwang Kyoon Park, Young Wook Cho, Young Tak Chough, Yoon Ho Kim

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We report an experimental demonstration of the nonclassical stationary light pulse (SLP) in a cold atomic ensemble. A single collective atomic excitation is created and heralded by detecting a Stokes photon in the spontaneous Raman scattering process. The heralded single atomic excitation is converted into a single stationary optical excitation or the single-photon SLP, whose effective group velocity is zero, effectively forming a trapped single-photon pulse within the cold atomic ensemble. The single-photon SLP is then released from the atomic ensemble as an anti-Stokes photon after a specified trapping time. The second-order correlation measurement between the Stokes and anti-Stokes photons reveals the nonclassical nature of the single-photon SLP. Our work paves the way toward quantum nonlinear optics without a cavity.

Original languageEnglish
Article number021016
JournalPhysical Review X
Issue number2
Publication statusPublished - 2018 Apr 13

Bibliographical note

Funding Information:
This work was supported by Samsung Science and Technology Foundation under Project No. SSTF-BA1402-07.

Publisher Copyright:
© 2018 authors. Published by the American Physical Society.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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