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arXiv 2202.04813quant-phphysics.atom-ph
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原子在行波光场中的行走

Atom walking in a traveling-wave light

Wenxi Lai

摘要:

本文研究了超慢单原子与行波光场相干耦合时的力学运动。该系统的主要噪声来源于原子波包中连续动量分布引起的多普勒展宽。本文证明了在强耦合区,多普勒展宽可以得到有效的抑制。在相干耦合作用下,单个中性原子周期性地沿一定方向运动。运动的方向取决于原子在与光学跃迁相关的两个内部状态中的占据,因为原子将受到取决于内部状态的吸引力或排斥力的影响。它类似于作用在带负电或带正电的粒子上的电力。我们解释了它们与自旋轨道耦合的原子,这是隐藏在我们的哈密顿。这些结果对未来原子器件的构建具有潜在的应用价值。

英文摘要:

In this paper, we investigate mechanical motion of ultra-slow single atoms considering each atom is coherently coupled to a traveling-wave light. The main noise in this system is originated from Doppler broadening due to the continuous momentum distribution in atom wave packet. Here, it is proved that the Doppler broadening could be effectively suppressed in strong coupling regime. Under the coherent coupling, individual neutral atoms periodically walk in a definite direction. Direction of the motion depends on occupation of the atom in its two internal states related to the optical transition, since the atom would be affected by attractive or repulsive forces depending on the internal states. It is analogous to the electric force acting on negatively or positively charged particles. We explain them with spin-orbit coupling of atoms which is hidden in our Hamiltonian. These results have potential applications for the construction of future atomic devices.

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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