arXiv 0910.17712009-10-09quant-phphysics.atom-ph

冻结里德伯气体中对涨落引起的谱线宽度展宽

Spectral Line Width Broadening from Pair Fluctuation in a Frozen Rydberg Gas

B. Sun, F. Robicheaux

发表信息：: Phys. Rev. A 78, 040701 (2008)
DOI：: 10.1103/PhysRevA.78.040701

摘要：

里德伯气体的谱线宽度增宽是近十年前在实验上观察到的一种现象，以前被认为是多体效应的结果。观察到的线宽通常是80-100倍大于从二元相互作用预测的平均相互作用强度。对这种现象的解释通常基于所谓的扩散模型，其中线宽加宽主要源于激发的扩散。本文提出了一个模型计算，表明扩散不是线宽展宽的主要机制。我们发现，在小间距的罕见对波动是占主导地位的因素，这种扩大。我们的结果给出了一个比平均相互作用强度大20-30倍的宽度。更重要的是，通过关闭扩散过程，我们没有观察到谱线宽度的数量级变化。

英文摘要：

Spectral line width broadening in Rydberg gases, a phenomenon previously attributed to the many-body effect, was observed experimentally almost a decade ago. The observed line width was typically 80-100 times larger than the average interaction strength predicted from a binary interaction. The interpretation of such a phenomenon is usually based on the so-called diffusion model, where the line width broadening mostly originates from the diffusion of excitations. In this paper, we present a model calculation to show that diffusion is not the main mechanism to the line width broadening. We find that the rare pair fluctuation at small separation is the dominant factor contributing to this broadening. Our results give a width of about 20-30 times larger than the average interaction strength. More importantly, by turning off the diffusion process, we do not observe order of magnitude change in the spectral line width.

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。

摘要：

英文摘要：

相关论文