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arXiv 1801.02804quant-ph
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矩形截面波导中运动原子的自发发射

Spontaneous emission of a moving atom in a waveguide of rectangular cross section

Jing Zeng, Jing Lu, Lan Zhou

摘要:

研究了矩形截面波导中受激二能级非相对论系统与真空相互作用系统的自发发射。所有TLS的过渡和TLS的质心运动被考虑在内。得到了TLS初始静止时发射光子的SE率和载频,发现它在质心(c. m.)发射光子的频率可以小于或大于TLS的跃迁频率,但SE率小于固定在同一波导中的TLS的SE率$Γ_{f}$。在一阶c.m.下得到了TLS初始运动时发射光子的SE率和携带频率。SE速率大于$Γ_{f}$,但与初始动量无关。当发射光子沿初始动量方向传播时,其携带频率增加,而当其沿初始动量的相反方向传播时,其携带频率减小。

英文摘要:

We study the spontaneous emission (SE) of an excited two-level nonrelativistic system (TLS) interacting with the vacuum in a waveguide of rectangular cross section. All TLS's transitions and the center-of-mass motion of the TLS are taken into account. The SE rate and the carried frequency of the emitted photon for the TLS initial being at rest is obtained, it is found in the first order of the center of mass (c.m.) that the frequency of the emitted photon could be smaller or larger than the transition frequency of the TLS but the SE rate is smaller than the SE rate $Γ_{f}$ of the TLS fixed in the same waveguide. The SE rate and the carried frequency of the emitted photon for the TLS initial being moving is also obtained in the first order of the c.m.. The SE rate is larger than $Γ_{f}$ but it is independent of the initial momentum. The carried frequency of the emitted photon is creased when it travels along the direction of the initial momentum and is decreased when it travels in the opposite direction of the initial momentum.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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