研究目的
Investigating the minimal conditions to store coherently a RF pulse in a material medium and connecting different types of memories in the RF and optical domain for quantum information processing.
研究成果
The study successfully implements a coherent memory using a quartz as a high-Q resonator, achieving an efficiency of 26% and a storage time of 209 μs. The coherent character of the memory is verified, and the work emphasizes the fundamental aspect of light storage in a material medium by dynamically varying the coupling constant.
研究不足
The storage time is limited by the intrinsic Q-factor of the quartz. The efficiency is theoretically limited to 25% in the forward configuration, with slight discrepancies due to transient responses of the analog switch. The scheme is limited to storing a single bit or temporal mode.
1：Experimental Design and Method Selection:
The study uses a commercial quartz as a memory support, exploiting its high Q-factor. The storage of RF pulses is achieved by dynamically varying the light–matter coupling with an analog switch, interpreted as a stopped-light experiment.
2：Sample Selection and Data Sources:
A commercial quartz is chosen for its availability and high Q-factor. The experimental setup includes an analog switch to vary the coupling dynamically.
3：List of Experimental Equipment and Materials:
The setup includes a commercial quartz, an analog switch (Texas Instruments TS12A12511), and compensation branches with inductors (Coilcraft 1812CS-472XJLC and 1812CS-183XJLC).
4：Experimental Procedures and Operational Workflow:
The experiment involves exciting the quartz with an RF pulse, dynamically varying the coupling to store the pulse, and then releasing it by re-establishing the coupling. The pulse shape is optimized for storage efficiency.
5：Data Analysis Methods:
The efficiency of storage is evaluated by integrating the square of the output pulse envelope after retrieval. The coherent character of the storage is demonstrated through phase relation and interference experiments.
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