A protocol, which essentially increases the efficiency of the quantum memory based on the atomic frequency comb (AFC), is proposed. It is well known that a weak short pulse, transmitted trough a medium with a periodic structure of absorption peaks separated by transparency windows (AFC), is transformed into prompt and delayed pulses. Time delay is equal to the inverse value of the frequency period of the peaks. It is proposed to send the prompt pulse again through the medium and to make both delayed pulses to interfere. This leads to the essential increase of the efficiency of the AFC storage protocol.

中文翻译：

---

基于原子频率梳提高量子存储器效率

提出了一种协议，该协议实质上提高了基于原子频率梳 (AFC) 的量子存储器的效率。众所周知，通过具有由透明窗 (AFC) 分隔的吸收峰的周期性结构的介质传输的弱短脉冲被转换为瞬发和延迟脉冲。时间延迟等于峰值频率周期的倒数。建议通过介质再次发送提示脉冲，并使两个延迟脉冲进行干扰。这导致 AFC 存储协议效率的本质提高。