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Updated: Feb 9, 2026
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Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
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Light storage for one second in room-temperature alkali vapor
Or Katz1,2, Ofer Firstenberg3
1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, 76100, Israel. or.katz@weizmann.ac.il.
Nature Communications
|June 1, 2018
Summary
Researchers developed a novel quantum memory using cesium vapor, achieving a record 1-second light storage time. This breakthrough overcomes atomic collision limitations, paving the way for more robust optical quantum networks.
Area of Science:
- Quantum Information Science
- Atomic Physics
- Optics
Background:
- Light storage in alkali vapors is crucial for quantum networks.
- Atomic collisions currently limit spin coherence and storage time to milliseconds.
- Existing schemes struggle with high atomic densities.
Purpose of the Study:
- To demonstrate a light storage scheme insensitive to spin-exchange collisions.
- To achieve long storage times at high atomic densities.
- To improve quantum memory performance in optical networks.
Main Methods:
- Mapping light fields onto spin orientation within a decoherence-free subspace.
- Utilizing room-temperature cesium vapor as the storage medium.
- Experimentally demonstrating the novel storage scheme.
Main Results:
- Achieved a record light storage time of 1 second in cesium vapor.
- Demonstrated insensitivity to spin-exchange collisions.
- Enabled long storage times at high atomic densities, a 100-fold improvement.
Conclusions:
- The developed scheme significantly enhances quantum memory storage times.
- This approach overcomes major limitations in current quantum storage technologies.
- The findings lay the groundwork for hour-long quantum memories using rare-gas nuclear spins.
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