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Updated: May 24, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
Published on: November 11, 2013
Storage and retrieval of ghost images in hot atomic vapor
Young-Wook Cho1, Joo-Eon Oh, Yoon-Ho Kim
1Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, South Korea. choyoungwook81@gmail.com
Abstract:
Ghost imaging is an imaging technique in which the image of an object is revealed only in the correlation measurement between two beams of light, whereas the individual measurements contain no imaging information. Here, we experimentally demonstrate storage and retrieval of ghost images in hot atomic rubidium vapor. Since ghost imaging requires (quantum or classical) multimode spatial correlation between two beams of light, our experiment shows that the spatially multimode correlation, a second-order correlation property of light, can indeed be preserved during the storage-retrieval process. Our work, thus, opens up new possibilities for quantum and classical two-photon imaging, all-optical image processing, and quantum communication.
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