论文标题
超速气体的二维电子光谱
Two-dimensional electronic spectroscopy of an ultracold gas
论文作者
论文摘要
飞秒连贯的多维光谱证明了超速气体。为此，使用相位调节光谱的设置来探测$ 3^2 \ mathrm {s} _ {1/2} - 2^2^2 \ Mathrm {p} _ {1/2，3/2，3/2} $在800 $ k-cold of $ k-cold of $ k-cold样品中的$^7 $ li li atoms intom contical in Magneto in a Magneto-intoce in a Magneto in a Magneto-lieptical-liepoct。观察双量子相干响应是颗粒间相互作用的特征，为使用该技术详细研究超速原子和分子气体中的几体和多体效应铺平了道路。该实验结合了3 GHz的频率分辨率，潜在的时间分辨率为200 fs，从而可以在频率和时域中对超低原子和分子进行高分辨率研究。
Femtosecond coherent multidimensional spectroscopy is demonstrated for an ultracold gas. For this, a setup for phase modulation spectroscopy is used to probe the $3^2\mathrm{S}_{1/2} - 2^2\mathrm{P}_{1/2, 3/2}$ transition in an 800 $μ$K-cold sample of $^7$Li atoms confined in a magneto-optical trap. The observation of a double quantum coherence response, a signature of interparticle interactions, paves the way for detailed investigations of few- and many-body effects in ultracold atomic and molecular gases using this technique. The experiment combines a frequency resolution of 3 GHz with a potential time resolution of 200 fs, which allows for high-resolution studies of ultracold atoms and molecules both in the frequency and in the time domain.
