受控粒子间相互作用下的相干布居俘获
Coherent Population Trapping with Controlled Interparticle Interactions
摘要:
本文研究了强相互作用超冷里德伯气体中的相干布居俘获。尽管有很强的范德华相互作用和粒子间的相关性,我们观察到的持久性与亚自然的线宽在单粒子共振频率的共振,因为我们调整的相互作用强度。这种狭窄的共振不能理解内的平均场描述的强里德伯-里德伯相互作用。相反,一个多体密度矩阵的方法,占粒子间的相关性的动力学,重现所观察到的光谱特征。
英文摘要:
We investigate Coherent Population Trapping in a strongly interacting ultracold Rydberg gas. Despite the strong van der Waals interactions and interparticle correlations, we observe the persistence of a resonance with subnatural linewidth at the single-particle resonance frequency as we tune the interaction strength. This narrow resonance cannot be understood within a meanfield description of the strong Rydberg--Rydberg interactions. Instead, a many-body density matrix approach, accounting for the dynamics of interparticle correlations, is shown to reproduce the observed spectral features.
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