Stimulated Emission of Superradiant Atoms in Waveguide Quantum Electrodynamics
Stimulated Emission of Superradiant Atoms in Waveguide Quantum Electrodynamics
复制标题
波导量子电动力学中超辐射原子的受激发射
DOI：
10.1103/physrevapplied.18.064006
复制
发表时间：
2022
影响因子：
4.6
通讯作者：
Koshino Kazuki
中科院分区：
文献类型：
--
作者：
Asaoka Rui;Gea-Banacloche Julio;Tokunaga Yuuki;Koshino Kazuki
我们研究了由相干态光子脉冲引起的耦合到波导的超辐射原子的受激发射。我们提供了短脉冲入射时的分析结果，表明原子相干地将光子发射到输出脉冲中，输出脉冲在短脉冲极限下保持相干状态。入射脉冲以保相方式放大，其中噪声几乎完全添加在相空间的相位方向上。对于足够短的脉冲，该特性提高了放大后的强度信号与噪声的比率。这是与一般保相线性放大器不同的独特之处，一般保相线性放大器在放大过程中信噪比会恶化。我们还讨论了光子发射概率对脉冲参数（例如脉冲面积和持续时间）的依赖性。
We investigate the stimulated emission of superradiant atoms coupled to a waveguide induced by a coherent-state photon pulse. We provide an analytical result when a shortpulse is incident, which shows that the atoms emit photons coherently into the output pulse, which remains a coherent state in the short pulse limit. An incident pulse is amplified in a phase-preserving manner, where noise is added almost entirely in the phase direction in phase space. This property improves the ratio of the intensity signal to noise after the amplification for sufficiently short pulses. This is a unique feature different from general phase-preserving linear amplifiers, where the signal-to-noise ratio deteriorates in the amplification process. We also discuss the dependence of the photon-emission probability on pulse parameters, such as the pulse area and the duration.