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Updated: May 12, 2026
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Gradient Echo Quantum Memory in Warm Atomic Vapor
Published on: November 11, 2013
Efficient quantum memory using a weakly absorbing sample
Mahmood Sabooni1, Qian Li, Stefan Kröll
1Department of Physics, Lund University, P. O. Box 118, SE-22100 Lund, Sweden.
Physical Review Letters
|April 16, 2013
Summary
Researchers achieved 56% efficiency in a light-storage experiment using the atomic frequency comb (AFC) technique. This demonstrates the potential for efficient, on-demand quantum memories with long storage times.
Area of Science:
- Quantum optics and photonics.
- Solid-state quantum memory research.
Background:
- The atomic frequency comb (AFC) technique offers high multimode capacity for quantum memories.
- Efficient light storage is crucial for quantum information processing and communication.
Purpose of the Study:
- To demonstrate a high-efficiency light-storage experiment using the AFC technique.
- To assess the feasibility of creating efficient, on-demand AFC quantum memories with long storage times.
Main Methods:
- An impedance-matched cavity was used to enclose a praseodymium-doped crystal (0.05%Pr(3+):Y2SiO5) with 10% single-pass absorption.
- Reflection coatings were directly deposited onto the crystal surfaces to create the cavity.
- The AFC technique was employed for light storage and retrieval.
Main Results:
- A total storage and retrieval efficiency of 56% was achieved.
- The experiment utilized a praseodymium-doped crystal within an impedance-matched cavity.
Conclusions:
- The study demonstrates the realistic potential for efficient, on-demand AFC quantum memories.
- Achieved efficiency suggests AFC memories can offer long storage times.
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